英制管螺纹对照表4篇

2022-10-23 19:20:02| 浏览次数：

篇一：英制管螺纹对照表

　　英制普通螺纹 (惠氏螺纹) -- 粗牙 (BSW) 名义尺大径螺距每英寸牙中径小径寸牙型代 mm mm 数 mm 外螺纹 Ww 号 d=D p tpi d2=D2 d3 1/16＂ BSW 1.587 0.423 60 1.315 1.050 3/32＂ BSW 2.381 0.529 48 2.041 1.703 1/8＂ BSW 3.175 0.635 40 2.768 2.362 5/32＂ BSW 3.969 0.793 32 3.459 2.952 3/16＂ BSW 4.762 1.058 24 4.084 3.407 7/32＂ BSW 5.556 1.058 24 4.878 4.201 1/4＂ BSW 6.350 1.270 20 5.537 4.724 5/16＂ BSW 7.938 1.411 18 7.034 6.131 3/8＂ BSW 9.525 1.588 16 8.509 7.492 7/16＂ BSW 11.113 1.814 14 9.951 8.789 1/2＂ BSW 12.700 2.117 12 11.345 9.990 5/8＂ BSW 15.876 2.309 11 14.397 12.918 3/4＂ BSW 19.051 2.540 10 17.424 15.798 7/8＂ BSW 22.226 2.822 9 20.419 18.611 1＂ BSW 25.400 3.175 8 23.368 21.335 1 1/8＂ BSW 28.576 3.629 7 26.253 23.929 1 1/4＂ BSW 31.751 3.629 7 29.428 27.104 1 3/8＂ BSW 34.926 4.233 6 32.215 29.505 1 1/2＂ BSW 38.100 4.233 6 35.391 32.680 1 5/8＂ BSW 41.277 5.080 5 38.024 34.771 1 3/4＂ BSW 44.452 5.080 5 41.199 37.946 1 7/8＂ BSW 47.627 5.645 4 1/2 44.012 40.398 2＂ BSW 50.802 5.645 4 1/2 47.187 43.573 2 1/4＂ BSW 57.152 6.350 4 53.086 49.020 2 1/2＂ BSW 63.502 6.350 4 59.436 55.370 2 3/4＂ BSW 69.853 7.257 3 1/2 65.205 60.558 3＂ BSW 76.203 7.257 3 1/2 71.556 66.909 3 1/4＂ BSW 82.553 7.816 3 1/4 77.548 72.544 3 1/2＂ BSW 88.903 7.816 3 1/4 83.899 78.894 3 3/4＂ BSW 95.254 8.467 3 89.832 84.410 4＂ BSW 101.604 8.467 3 96.182 90.760 4 1/4＂ BSW 107.954 8.835 2 7/8 102.297 96.639 4 1/2＂ BSW 114.304 8.835 2 7/8 108.647 102.990 4 3/4＂ BSW 120.665 9.237 2 3/4 114.740 108.625 5＂ BSW 127.005 9.237 2 3/4 121.090 115.176 5 1/4＂ BSW 133.355 9.677 2 5/8 127.159 120.963 5 1/2＂ BSW 139.705 9.677 2 5/8 133.509 127.313 5 3/4＂ BSW 146.055 10.160 2 1/2 139.549 133.043 6＂ BSW 152.406 10.160 2 1/2 145.900 139.394

　　牙型高 H1 0.270 0.338 0.406 0.507 0.677 0.677 0.813 0.904 1.017 1.162 1.355 1.479 1.627 1.807 2.033 2.324 2.324 2.711 2.711 3.253 3.253 3.614 3.614 4.066 4.066 4.647 4.647 5.005 5.005 5.422 5.422 5.657 5.657 5.915 5.915 6.196 6.196 6.506 6.506

　　底孔直径 mm 1.15 1.90 2.50 3.20 3.70 4.50 5.10 6.50 7.90 9.20 10.40 13.40 16.25 19.25 22.00 24.50 27.25 30.25 33.50 35.50 38.50 41.25 44.50 50.00 56.00 61.50 68.00 73.75 80.00 85.50 92.00 98.00 104.20 110.00 116.50 122.50 128.50 134.50 141.00

　　英制普通螺纹英制普通螺纹 -- 细牙 -- BSF

　　英制普通螺纹 (惠氏螺纹) -- 细牙 (BSW) 大径螺距中径小径名义尺寸 mm mm 每英寸牙数 mm 外螺纹牙型高底孔直径 BSF 牙型代号 d=D p tpi d2=D2 d3 H1 mm 3/16 BSF 4.763 0.794 32 4.255 3.747 0.508 4.00 7/32 BSF 5.556 0.907 28 4.975 4.394 0.581 4.60 1/4 BSF 6.350 0.977 26 5.725 5.100 0.625 5.30 9/32 BSF 7.142 0.977 26 6.518 5.893 0.625 6.10 5/16 BSF 7.938 1.156 22 7.199 6.459 0.739 6.80 3/8 BSF 9.525 1.27 20 8.712 7.899 0.813 8.30 7/16 BSF 11.113 1.411 18 10.209 9.304 0.904 9.70 1/2 BSF 12.700 1.588 16 11.684 10.668 1.017 11.10 9/16 BSF 14.288 1.588 16 13.272 12.256 1.017 12.70 5/8 BSF 15.875 1.814 14 14.712 13.549 1.162 14.00 11/16 BSF 17.463 1.814 14 16.300 15.137 1.162 15.50 3/4 BSF 19.050 2.117 12 17.693 16.336 1.355 16.75 13/16 BSF 20.638 2.117 12 19.281 17.924 1.355 18.25 7/8 BSF 22.225 2.309 11 20.747 19.269 1.479 19.75 1 BSF 25.400 2.54 10 23.774 22.148 1.627 22.75 1 1/8 BSF 28.575 2.822 9 26.769 24.963 1.807 26.50 1 1/4 BSF 31.750 2.822 9 29.944 28.138 1.807 28.75 1 3/8 BSF 34.925 3.175 8 32.893 30.861 2.033 31.50 1 1/2 BSF 38.100 3.175 8 36.068 34.036 2.033 34.50 1 5/8 BSF 41.275 3.175 8 39.243 37.211 2.033 38.00 1 3/4 BSF 44.450 3.629 7 42.126 39.802 2.324 40.50 2 BSF 50.800 3.629 7 48.476 46.152 2.324 47.00 2 1/4 BSF 57.150 4.234 6 54.440 51.730 2.711 53.00 2 1/2 BSF 63.500 4.234 6 60.790 58.080 2.711 59.00 2 3/4 BSF 69.850 4.234 6 67.140 64.430 2.711 3 BSF 76.200 5.08 5 72.946 69.692 3.253 3 1/4 BSF 82.550 5.08 5 79.296 76.042 3.253 3 1/2 BSF 88.900 5.645 4 1/2 85.285 81.670 3.614 3 3/4 BSF 95.250 5.645 4 1/2 91.635 88.020 3.614 4 BSF 101.600 5.645 4 1/2 97.985 94.370 3.614 4 1/4 BSF 107.950 6.35 4 103.886 99.822 4.066 -

篇二：英制管螺纹对照表

　　螺纹标准的一种，按外形分圆柱、圆锥两种；按牙型角分 55°、60°两种。螺纹中的 1/4、1/2、1/8 标记是指螺纹尺寸的直径，单位是英寸。一寸等于 8 分， 1/4 寸就是 2 分，如此类推。

　　美国标准 ANSI B1.10 一般用途螺纹牙型角 60°，牙底是平的或圆弧的内、外螺纹。

　　圆弧牙底的只用于外螺纹，没有内螺纹 UN 恒定螺距系列的统一螺纹 UNC 粗牙系列的统一螺纹 UNF 细牙系列的统一螺纹 UNEF 超细牙系列的统一螺纹 UNS① 特殊系列的统一螺纹 UNR 圆弧牙底恒定螺距系列的统一螺纹 UNRC 圆弧牙底粗牙系列统一螺纹 UNRF 圆弧牙底细牙系列统一螺纹 UNREF 圆弧牙底超细牙系列统一螺纹 UNRS 圆弧牙底特殊系列统一螺纹表中螺距单位为每英寸牙数。钻孔直径为攻丝推荐钻孔尺寸，单位为毫米。

　　公称直径（英寸〖毫米〗）

　　粗牙螺距（UNC）

　　细牙螺距（UNF）

　　超细牙螺距（UNEF）

　　钻孔直径（粗牙）

　　钻孔直径（细牙）

　　0.060

　　〖1.524〗

　　1.2

　　0.073

　　〖1.854〗

　　1.5

　　0.086

　　〖2.184〗

　　1.8

　　0.099

　　〖2.515〗

　　2.0

　　2.1

　　0.112

　　〖2.845〗

　　2.3

　　2.4

　　0.125

　　〖3.175〗

　　2.5

　　2.6

　　0.138

　　〖3.505〗

　　2.7

　　2.9

　　0.164

　　〖4.166〗

　　3.4

　　3.5

　　#10 0.190

　　〖4.826〗

　　3.7

　　4.0

　　#12 0.216

　　〖5.486〗

　　4.5

　　4.6

　　1/4

　　〖6.35〗

　　5.1

　　5.4

　　5/16

　　〖7.938〗

　　6.5

　　6.9

　　3/8

　　〖9.525〗

　　8.0

　　8.4

　　7/16

　　〖11.113〗

　　9.3

　　10.0

　　1/2

　　〖12.7〗

　　10.7

　　11.5

　　9/16

　　〖14.288〗

　　12.3

　　13.1

　　5/8

　　〖15.875〗

　　13.5

　　14.7

　　3/4

　　〖19.05〗

　　16.7

　　17.5

　　7/8

　　〖22.225〗

　　19.4

　　20.6

　　〖25.4〗

　　22.2

　　23.4

篇三：英制管螺纹对照表

　　External Thread /Internal Thread a For Class 2A threads with coating (plating) the max. is increased by the allowance, to the basic size. This is the same value as Class 3A. b For uncoated hot-rolled, but not standard fasteners with cold rolled threads c UN series external thread, Max.Diameter =Basic - Allowance, for Class 1A and 2A =Basic for Class 3A

　　Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext.

　　Nominal Size, TPI, Series 0-80 UNF 0-80 UNF 1-64 UNC 1-64 UNC 1-72 UNF 1-72 UNF 2-56 UNC 2-56 UNC 2-64 UNF 2-64 UNF 3-48 UNC 3-48 UNC 3-56 UNF 3-56 UNF 4-40 UNC 4-40 UNC 4-48 UNF 4-48 UNF 5-40 UNC

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　Min

　　2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A

　　0.0127 0 0 0 0.01524 0 0 0 0.01524 0 0 0 0.01524 0 0 0 0.01524 0 0 0 0.01778 0 0 0 0.01778 0 0 0 0.02032 0 0 0 0.01778 0 0 0 0.02032

　　1.511 1.306 1.524 1.306 1.839 1.582 1.854 1.582 1.839 1.613 1.854 1.613 2.169 1.872 2.184 1.872 2.169 1.913 2.184 1.913 2.497 2.146 2.515 2.146 2.497 2.197 2.515 2.197 2.824 2.385 2.845 2.385 2.827 2.459 2.845 2.459 3.155

　　1.430 1.181 1.443 1.181 1.742 1.425 1.758 1.425 1.750 1.473 1.765 1.473 2.065 1.694 2.080 1.694 2.073 1.755 2.088 1.755 2.383 1.941 2.400 1.941 2.393 2.024 2.410 2.024 2.695 2.156 2.715 2.156 2.713 2.271 2.731 2.271 3.025

　　Maxa Major Min Pitch Dia(Min) Pitch 1.306 1.260 1.133 1.377 1.318 1.524 1.318 1.285 1.146 1.361 1.318 1.524 1.582 1.532 1.367 1.664 1.598 1.854 1.598 1.560 1.382 1.646 1.598 1.854 1.610 1.562 1.420 1.689 1.626 1.854 1.626 1.590 1.435 1.674 1.626 1.854 1.875 1.821 1.631 1.961 1.890 2.184 1.890 1.849 1.646 1.943 1.890 2.184 1.913 1.862 1.697 1.996 1.928 2.184 1.928 1.890 1.712 1.979 1.928 2.184 2.154 2.096 1.864 2.248 2.172 2.515 2.172 2.129 1.882 2.228 2.172 2.515 2.202 2.146 1.958 2.291 2.220 2.515 2.220 2.179 1.976 2.273 2.220 2.515 2.413 2.350 2.068 2.517 2.433 2.845 2.433 2.385 2.088 2.494 2.433 2.845 2.484 2.423 2.195 2.581 2.502 2.845 2.502 2.456 2.212 2.560 2.502 2.845 2.743 2.677 2.398

　　UNRc Minor Dia

　　陈拓延2004共33页第1页

　　Nominal Size, TPI, Series Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. 5-40 UNC 5-44 UNF 5-44 UNF 6-32 UNC 6-32 UNC 6-40 UNF 6-40 UNF 8-32 UNC 8-32 UNC 8-36 UNF 8-36 UNF 10-24 UNC 10-24 UNC 10-28 UNS 10-32UNF 10-32UNF 10-36 UNS 10-40 UNS 10-48 UNS 10-56 UNS 12-24 UNC

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　Min

　　2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 2A 2B 2A 2B 2A 2B 2A 2B

　　0 0 0 0.01778 0 0 0 0.02032 0 0 0 0.02032 0 0 0 0.02286 0 0 0 0.02032 0 0 0 0.0254 0 0 0 0.0254 0 0.02286 0 0 0 0.02286 0 0.02286 0 0.02032 0 0.01778 0 0.0254 0

　　2.697 3.175 2.697 3.157 2.741 3.175 2.741 3.485 2.896 3.505 2.896 3.485 3.023 3.505 3.012 4.143 3.531 4.166 3.528 4.145 3.607 4.166 3.597 4.801 3.962 4.826 3.950 4.801 4.064 4.803 4.166 4.826 4.168 4.803 4.216 4.803 4.293 4.806 4.369 4.808 4.445 5.461 4.597

　　2.487 3.045 2.487 3.035 2.550 3.053 2.550 3.332 2.642 3.353 2.642 3.355 2.819 3.376 2.819 3.990 3.302 4.013 3.302 4.006 3.404 4.026 3.404 4.618 3.683 4.643 3.683 4.636 3.835 4.651 3.962 4.674 3.962 4.663 4.064 4.674 4.140 4.691 4.242 4.704 4.343 5.278 4.343

　　Maxa Major Min Pitch Dia(Min) Pitch 2.847 2.764 3.175 2.764 2.715 2.418 2.827 2.764 3.175 2.781 2.718 2.469 2.880 2.799 3.175 2.799 2.751 2.487 2.860 2.799 3.175 2.969 2.898 2.540 3.084 2.990 3.505 2.990 2.936 2.560 3.058 2.990 3.505 3.073 3.007 2.728 3.180 3.094 3.505 3.094 3.043 2.748 3.157 3.094 3.505 3.627 3.553 3.198 3.747 3.650 4.166 3.650 3.594 3.221 3.721 3.650 4.166 3.688 3.617 3.305 3.800 3.708 4.166 4.166 3.655 3.325 3.777 3.708 4.166 4.112 4.028 3.541 4.247 4.138 4.826 4.138 4.074 3.566 4.219 4.138 4.826 4.211 4.128 3.719 4.346 4.237 4.826 4.288 4.211 3.858 4.409 4.310 4.826 4.310 4.252 3.881 4.384 4.310 4.826 4.346 4.270 3.962 4.468 4.369 4.826 4.392 4.318 4.044 4.509 4.415 4.826 4.463 4.397 4.176 4.569 4.483 4.826 4.514 4.450 4.270 4.613 4.531 4.826 4.773 4.686 4.201 4.910 4.798 5.486

　　UNRc Minor Dia

　　陈拓延2004共33页第2页

　　Ext. Int. Ext. 12-28 UNF Int. Ext. 12-28 UNF Int. Ext. 12-32 UNEF Int. Ext. 12-32 UNEF Int. Ext. 12-36 UNS Int. Ext. 12-40 UNS Int. Ext. 12-48 UNS Int. Ext. 12-56 UNS Int. Ext. 1/4-20 UNC Int. Ext. 1/4-20 UNC Int. Ext. 1/4-20 UNC Int. Ext. 1/4-24 UNS Int. Ext. 1/4-27 UNS Int. Ext. 1/4-28 UNF Int. Ext. 1/4-28 UNF Int. Ext. 1/4-28 UNF Int. Ext. 1/4-32 UNEF Int. Ext. 1/4-32 UNEF Int. Ext. 1/4-36 UNS Int. Ext. Int.

　　Nominal Size, TPI, Series 12-24 UNC

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　/4-40 UNS

　　3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 2A 2B 2A 2B 1A 1B 2A 2B 3A 3B 2A 2B 2A 2B 1A 1B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B

　　0 5.486 0 4.590 0.0254 5.461 0 4.724 0 5.486 0 4.717 0.02286 5.464 0 4.826 0 5.486 0 4.813 0.02286 5.464 0 4.877 0.02286 5.464 0 4.953 0.02032 5.466 0 5.029 0.01778 5.469 0 5.105 0.02794 6.322 0 5.258 0.02794 6.322 0 5.258 0 6.350 0 5.250 0.02794 6.322 0 5.461 0.0254 6.325 0 5.563 0.0254 6.325 0 5.588 0.0254 6.325 0 5.588 0 6.350 0 5.563 0.0254 6.325 0 5.690 0 6.350 0 5.662 0.02286 31.727 0 5.740 0.02286 6.327 0 5.817

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 5.304 4.798 4.732 4.227 4.343 4.882 4.798 5.486 5.296 4.872 4.790 4.379 4.496 5.004 4.897 5.486 5.321 4.897 4.836 4.404 4.496 4.976 4.897 5.486 5.311 4.948 4.869 4.519 4.623 5.075 4.971 5.486 5.334 4.971 4.910 4.542 4.623 5.050 4.971 5.486 5.324 5.006 4.930 4.625 4.724 5.128 5.029 5.486 5.334 5.052 4.978 4.661 4.801 5.169 5.075 5.486 5.352 5.123 5.057 4.836 4.902 5.230 5.144 5.486 5.364 5.174 5.110 4.930 5.004 5.273 5.192 5.486 6.012 5.497 5.354 4.811 4.978 5.710 5.525 6.350 6.116 0.2367 5.497 5.403 4.811 4.978 5.649 5.525 6.350 6.144 5.525 5.453 4.839 4.978 5.616 5.525 6.350 6.139 5.634 5.540 5.062 5.207 5.784 5.662 6.350 6.154 5.712 5.624 5.204 5.334 5.852 5.738 6.350 6.076 5.735 5.608 5.243 5.359 5.926 5.761 6.350 6.160 5.735 5.652 5.243 5.359 5.870 5.761 6.350 6.185 5.761 5.697 5.268 5.359 5.842 5.761 6.350 6.172 5.809 5.728 5.380 5.486 5.941 5.834 6.350 6.198 5.834 5.773 5.405 5.486 5.913 5.834 6.350 6.187 5.870 5.791 5.489 5.588 5.994 5.893 6.350 6.198 5.916 5.842 5.570 5.664 6.035 5.939 6.350

　　UNRc Minor Dia

　　陈拓延2004共33页第3页

　　Nominal Size, TPI, Series Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int.

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　2A 2B 1 /4-56 UNS 2A 2B 5 /16-18 UNC 1A 1B 5 /16-18 UNC 2A 2B 5 /16-18 UNC 3A 3B 5 /16-20 UN 2A 2B 5 /16-20 UN 3A 3B 5 /16-24 UNF 1A 1B 5 /16-24 UNF 2A 2B 5 /16-24 UNF 3A 3B 5 /16-27 UNS 2A 2B 5 /16-28 UN 2A 2B 5 /16-28 UN 3A 3B 5 /16-32 UNEF 2A 2B 5 /16-32 UNEF 3A 3B 5 /16-36 UNS 2A 2B 5 /16-40 UNS 2A 2B 5 /16-48 UNS 2A 2B 3 /8-16 UNC 1A 1B 3 /8-16 UNC 2A 2B 3 /8-16 UNC 3A 3B

　　/4-48 UNS

　　0.02032 0 0.02032 0 0.03048 0 0.03048 0 0 0 0.03048 0 0 0 0.02794 0 0.02794 0 0 0 0.0254 0 0.0254 0 0 0 0.0254 0 0 0 0.02286 0 0.02286 0 0.02032 0 0.03302 0 0.03302 0 0 0

　　6.330 5.893 6.330 5.969 7.907 6.731 7.907 6.731 7.938 6.680 7.907 6.858 7.938 6.807 7.910 7.036 7.910 7.036 7.938 6.995 7.912 7.137 7.912 7.163 7.938 7.130 7.912 7.264 7.938 7.231 7.915 7.341 7.915 7.391 7.917 7.493 9.492 8.153 9.492 8.153 9.525 8.082

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 6.215 5.987 5.918 5.697 5.766 6.099 6.007 6.350 6.226 6.035 5.969 5.791 5.867 6.139 6.055 6.350 7.574 6.990 6.835 6.228 6.401 7.221 7.021 7.938 7.686 0.2982 6.990 6.888 6.228 6.401 7.155 7.021 7.938 7.717 7.021 6.944 6.259 6.401 7.120 7.021 7.938 7.701 7.082 6.980 6.396 6.553 7.244 7.112 7.938 7.732 7.112 7.036 6.426 6.553 7.211 7.112 7.938 7.635 7.221 7.082 6.650 6.782 7.430 7.249 7.938 7.727 7.221 7.127 6.650 6.782 7.371 7.249 7.938 7.755 7.249 7.181 6.678 6.782 7.341 7.249 7.938 7.742 7.300 7.211 6.792 6.909 7.440 7.325 7.938 7.747 7.323 7.236 6.830 6.960 7.460 7.348 7.938 7.772 7.348 7.282 6.855 6.960 7.432 7.348 7.938 7.760 7.396 7.315 6.967 7.087 7.529 7.422 7.938 7.785 7.422 7.361 6.993 7.087 7.501 7.422 7.938 7.775 7.457 7.379 7.074 7.163 7.582 7.480 7.938 7.785 7.503 7.430 7.158 7.239 7.623 7.526 7.938 7.803 7.574 7.506 7.287 7.366 7.686 7.595 7.938 9.131 8.461 8.296 7.600 7.798 8.710 8.494 9.525 9.253 0.3595 8.461 8.349 7.600 7.798 8.639 8.494 9.525 9.286 8.494 8.410 7.633 7.798 8.603 8.494 9.525

　　UNRc Minor Dia

　　陈拓延2004共33页第4页

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　2A 2B 3 /8-20 UN 2A 2B 3 /8-20 UN 3A 3B 3 /8-24 UNF 1A 1B 3 /8-24 UNF 2A 2B 3 /8-24 UNF 3A 3B 3 /8-27 UNS 2A 2B 3 /8-28 UN 2A 2B 3 /8-28 UN 3A 3B 3 /8-32 UNEF 2A 2B 3 /8-32 UNEF 3A 3B 3 /8-36 UNS 2A 2B 3 /8-40 UNS 2A 2B 0.390?7 UNS 2A 2B 7 /16-14 UNC 1A 1B 7 /16-14 UNC 2A 2B 7 /16-14 UNC 3A 3B 7 /16-16 UN 2A 2B 7 /16-16 UN 3A 3B 7 /16-18 UNS 2A 2B 7 /16-20 UNF 1A 1B

　　/8-18 UNS

　　0.03302 0 0.03048 0 0 0 0.02794 0 0.02794 0 0 0 0.02794 0 0.02794 0 0 0 0.0254 0 0 0 0.0254 0 0.02286 0 0.02794 0 0.03556 0 0.03556 0 0 0 0.03556 0 0 0 0.03302 0 0.03302 0

　　9.492 8.331 9.495 8.433 9.525 8.374 9.497 8.636 9.497 8.636 9.525 8.565 9.497 8.738 9.497 8.763 9.525 8.702 9.500 8.865 9.525 8.811 9.500 8.941 9.502 8.992 9.878 9.119 11.077 9.550 11.077 9.550 11.113 9.441 11.077 9.754 11.113 9.652 11.079 9.906 11.079 10.033

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 9.271 8.575 8.466 7.813 8.001 8.750 8.608 9.525 9.289 8.669 8.565 7.983 8.153 8.837 8.700 9.525 9.319 8.700 8.621 8.014 8.153 8.801 8.700 9.525 9.223 8.809 8.664 8.237 8.382 9.025 8.837 9.525 9.314 8.809 8.712 8.237 8.382 8.961 8.837 9.525 9.342 8.837 8.763 8.265 8.382 8.931 8.837 9.525 9.327 8.885 8.793 8.377 8.509 9.032 8.913 9.525 9.332 8.908 8.816 8.415 8.534 9.053 8.936 9.525 9.360 8.936 8.867 8.443 8.534 9.025 8.936 9.525 9.347 8.984 8.898 8.555 8.661 9.121 9.009 9.525 9.373 9.009 8.946 8.580 8.661 9.093 9.009 9.525 9.360 9.042 8.961 8.659 8.763 9.174 9.068 9.525 9.373 9.091 9.012 8.745 8.839 9.215 9.114 9.525 9.708 9.266 9.174 8.758 8.890 9.413 9.294 9.906 10.683 9.898 9.718 8.918 9.144 10.168 9.934 11.113 0.4206 10.815 9.898 9.779 8.918 9.144 10.089 9.934 11.113 36.251 9.934 9.845 8.954 9.144 10.051 9.934 11.113 10.838 10.046 9.929 9.185 9.398 10.231 10.081 11.113 10.874 10.081 9.995 9.220 9.398 10.196 10.081 11.113 10.859 10.163 10.053 9.401 9.576 10.338 10.196 11.113 10.770 10.254 10.097 9.568 9.728 10.493 10.287 11.113

　　UNRc Minor Dia

　　陈拓延2004共33页第5页

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　2A 2B 7 /16-20 UNF 3A 3B 7 /16-24 UNS 2A 2B 7 /16-27 UNS 2A 2B 7 /16-28 UNEF 2A 2B 7 /16-28 UNEF 3A 3B 7 /16-32 UN 2A 2B 7 /16-32 UN 3A 3B 1 /2-12 UNS 2A 2B 1 /2-12 UNS 3A 3B 1 /2-13 UNC 1A 1B 1 /2-13 UNC 2A 2B 1 /2-13 UNC 3A 3B 1 /2-14 UNS 2A 2B 1 /2-16 UN 2A 2B 1 /2-16 UN 3A 3B 1 /2-18 UNS 2A 2B 1 /2-20 UNF 1A 1B 1 /2-20 UNF 2A 2B 1 /2-20 UNF 3A 3B 1 /2-24 UNS 2A 2B

　　/16-20 UNF

　　0.03302 0 0 0 0.02794 0 0.02794 0 0.02794 0 0 0 0.0254 0 0 0 0.04064 0 0 0 0.0381 0 0.0381 0 0 0 0.0381 0 0 0 0 0 0.03302 0 0.03302 0 0.03302 0 0 0 0.03048 0

　　11.079 10.033 11.113 9.947 11.085 10.211 11.085 10.312 11.085 10.338 11.113 10.290 11.087 10.439 11.113 10.399 12.659 10.871 12.700 10.726 12.662 11.024 12.662 11.024 12.700 10.881 12.662 11.125 12.664 11.328 12.700 11.224 12.667 11.506 12.667 11.608 12.667 11.608 12.700 11.524 12.670 11.811

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 10.874 10.254 10.147 9.568 9.728 10.424 10.287 11.113 10.907 10.287 10.208 9.601 9.728 10.391 10.287 11.113 10.902 10.396 10.300 9.825 9.957 10.549 10.424 11.113 10.914 10.472 10.381 9.964 10.084 10.620 10.500 11.113 10.919 10.495 10.404 9.749 10.135 10.640 10.523 11.113 10.947 10.523 10.455 10.030 10.135 10.612 10.523 11.113 10.935 10.571 10.485 10.142 10.262 10.709 10.597 11.113 10.960 10.597 10.533 10.168 10.262 10.681 10.597 11.113 12.370 11.285 11.148 10.140 10.414 11.504 11.326 12.700 12.410 11.326 11.224 10.180 10.414 11.458 11.326 12.700 12.248 11.392 11.204 10.335 10.592 11.676 11.430 12.700 12.385 0.4822 11.392 11.265 10.335 10.592 11.595 11.430 12.700 12.423 11.430 11.336 10.373 10.592 11.552 11.430 12.700 12.400 11.483 11.356 10.503 10.744 11.687 11.521 12.700 12.426 11.633 11.514 10.772 10.973 11.824 11.669 12.700 12.461 11.669 11.580 10.808 10.973 11.786 11.669 12.700 12.446 11.750 11.638 10.988 11.176 11.930 11.783 12.700 12.357 11.841 11.156 11.156 11.328 12.088 11.875 12.700 12.461 11.841 11.732 11.156 11.328 12.017 11.875 12.700 12.494 11.875 11.793 11.189 11.328 11.981 11.875 12.700 12.487 11.981 11.882 11.410 11.557 12.141 12.012 12.700

　　UNRc Minor Dia

　　陈拓延2004共33页第6页

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　2A 2B 1 /2-28 UNEF 2A 2B 1 /2-28 UNEF 3A 3B 1 /2-32 UN 2A 2B 1 /2-32 UN 3A 3B 9 /16-12 UNC 1A 1B 9 /16-12 UNC 2A 2B 9 /16-12 UNC 3A 3B 9 /16-14 UNS 2A 2B 9 /16-16 UN 2A 2B 9 /16-16 UN 3A 3B 9 /16-18 UNF 1A 1B 9 /16-18 UNF 2A 2B 9 /16-18 UNF 3A 3B 9 /16-20 UN 2A 2B 9 /16-20 UN 3A 3B 9 /16-24 UNEF 2A 2B 9 /16-24 UNEF 3A 3B 9 /16-27 UNS 2A 2B 9 /16-28 UN 2A 2B 9 /16-28 UN 3A 3B

　　/2-27 UNS

　　0.02794 0 0.02794 0 0 0 0.0254 0 0 0 0.04064 0 0.04064 0 0 0 0.0381 0 0.03556 0 0 0 0.03556 0 0.03556 0 0 0 0.03302 0 0 0 0.03048 0 0 0 0.02794 0 0.02794 0 0 0

　　12.672 11.913 12.672 11.938 12.700 11.877 12.675 12.040 12.700 11.986 14.247 12.446 14.247 12.446 14.288 12.301 14.249 12.725 14.252 12.929 14.288 12.802 14.252 13.081 14.252 13.081 14.288 12.969 14.254 13.208 14.288 13.111 14.257 13.386 14.288 13.320 14.260 13.487 14.260 13.513 14.288 13.465

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 12.502 12.060 11.966 11.552 11.684 12.210 12.088 12.700 12.507 12.083 11.989 11.590 11.709 12.233 12.111 12.700 12.535 12.111 12.040 11.618 11.709 12.202 12.111 12.700 12.522 12.159 12.070 11.730 11.836 12.299 12.184 12.700 12.548 12.184 12.118 11.755 11.836 12.271 12.184 12.700 13.810 12.873 12.675 11.727 11.989 13.172 12.913 14.288 13.957 0.5437 12.873 12.741 11.727 11.989 13.086 12.913 14.288 13.998 12.913 12.814 11.768 11.989 13.043 12.913 14.288 13.988 13.071 12.944 12.090 12.319 13.274 13.109 14.288 14.013 13.221 13.101 12.360 12.573 13.411 13.256 14.288 14.049 13.256 13.167 12.395 12.573 13.373 13.256 14.288 13.919 13.335 13.162 12.573 12.751 13.597 13.371 14.288 14.031 13.335 13.221 12.573 12.751 13.520 13.371 14.288 14.067 13.371 13.284 12.609 12.751 13.482 13.371 14.288 14.049 13.429 13.322 12.743 12.903 13.602 13.462 14.288 14.082 13.462 13.381 12.776 12.903 13.566 13.462 14.288 14.074 13.569 13.470 12.997 13.132 13.729 13.599 14.288 14.105 13.599 13.526 13.028 13.132 13.696 13.599 14.288 14.089 13.647 13.553 13.139 13.259 13.797 13.675 14.288 14.094 13.670 13.576 13.178 13.310 13.820 13.698 14.288 14.122 13.698 13.627 13.205 13.310 13.790 13.698 14.288

　　UNRc Minor Dia

　　陈拓延2004共33页第7页

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　/16-32 UN /16-32 UN

　　/8-11 UNC /8-11 UNC /8-11 UNC /8-12 UN /8-12 UN

　　/8-14 UNS /8-16 UN /8-16 UN

　　/8-18 UNF /8-18 UNF /8-18 UNF /8-20 UN /8-20 UN

　　/8-24 UNEF /8-24 UNEF /8-27 UNS /8-28 UN /8-28 UN /8-32 UN

　　2A 2B 3A 3B 1A 1B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 1A 1B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B

　　0.0254 0 0 0 0.04064 0 0.04064 0 0 0 0.04064 0 0 0 0.0381 0 0.03556 0 0 0 0.03556 0 0.03556 0 0 0 0.03302 0 0 0 0.03048 0 0 0 0.02794 0 0.02794 0 0 0 0.02794 0

　　14.262 13.614 14.288 13.574 15.834 13.868 15.834 13.868 15.875 13.693 15.834 14.046 15.875 13.876 15.837 14.326 15.839 14.503 15.875 14.381 15.839 14.681 15.839 14.681 15.875 14.554 15.842 14.783 15.875 14.699 15.845 14.986 15.875 14.907 15.847 15.088 15.847 15.113 15.875 15.052 15.847 15.215

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 14.110 13.746 13.658 13.317 13.437 13.886 13.772 14.288 14.135 13.772 13.706 13.343 13.437 13.858 13.772 14.288 15.372 14.336 14.125 13.086 13.386 14.648 14.376 15.875 15.527 0.6052 14.336 14.196 13.086 13.386 14.559 14.376 15.875 15.568 14.376 14.272 13.127 13.386 14.514 14.376 15.875 15.545 14.460 14.323 13.315 13.589 14.681 14.501 15.875 15.585 14.501 14.397 13.355 13.589 14.635 14.501 15.875 15.575 14.658 14.529 13.678 13.919 14.864 14.696 15.875 15.601 14.808 14.686 13.947 14.148 15.001 14.844 15.875 15.636 14.844 14.752 13.983 14.148 14.961 14.844 15.875 15.507 14.923 14.745 14.161 14.351 15.189 14.958 15.875 15.618 14.923 14.803 14.161 14.351 15.110 14.958 15.875 15.654 14.958 14.869 14.196 14.351 15.072 14.958 15.875 15.636 15.016 14.907 14.331 14.503 15.192 15.050 15.875 15.669 15.050 14.968 14.364 14.503 15.156 15.050 15.875 15.662 15.156 15.055 14.585 14.732 15.319 15.187 15.875 15.692 15.187 15.110 14.615 14.732 15.286 15.187 15.875 15.677 15.235 15.138 14.727 14.859 15.390 15.263 15.875 15.682 15.258 15.161 14.765 14.884 15.410 15.286 15.875 15.710 15.286 15.215 14.793 14.884 15.380 15.286 15.875 15.695 15.331 15.240 14.902 15.011 15.476 15.359 15.875

　　UNRc Minor Dia

　　陈拓延2004共33页第8页

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　3A 3B 11 /16-12 UN 2A 2B 11 /16-12 UN 3A 3B 11 /16-16 UN 2A 2B 11 /16-16 UN 3A 3B 11 /16-20 UN 2A 2B 11 /16-20 UN 3A 3B 11 /16-24 UNEF 2A 2B 11 /16-24 UNEF 3A 3B 11 /16-28 UN 2A 2B 11 /16-28 UN 3A 3B 11 /16-32 UN 2A 2B 11 /16-32 UN 3A 3B 3 /4-10 UNC 1A 1B 3 /4-10 UNC 2A 2B 3 /4-10 UNC 3A 3B 3 /4-12 UN 2A 2B 3 /4-12 UN 3A 3B 3 /4-14 UNS 2A 2B 3 /4-16 UNF 1A 1B 3 /4-16 UNF 2A 2B

　　/8-32 UN

　　0 0 0.04064 0 0 0 0.03556 0 0 0 0.03302 0 0 0 0.03048 0 0 0 0.02794 0 0 0 0.02794 0 0 0 0.04572 0 0.04572 0 0 0 0.04318 0 0 0 0.0381 0 0.0381 0 0.0381 0

　　15.875 15.161 17.422 15.621 17.463 15.456 17.427 16.104 17.463 15.961 17.429 16.383 17.463 16.286 17.432 16.561 17.463 16.495 17.435 16.688 17.463 16.640 17.435 16.789 17.463 16.749 19.004 16.840 19.004 16.840 19.050 16.624 19.007 17.221 19.050 17.036 19.012 17.475 19.012 17.678 19.012 17.678

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 15.723 15.359 15.291 14.930 15.011 15.448 15.359 15.875 17.132 16.048 15.911 14.902 15.164 16.269 16.088 17.463 17.173 16.088 15.984 14.943 15.164 16.223 16.088 17.463 17.188 16.396 16.274 15.535 15.748 16.589 16.431 17.463 17.224 16.431 16.340 15.570 15.748 16.548 16.431 17.463 17.224 16.604 16.495 15.918 16.078 16.779 16.637 17.463 17.257 16.637 16.556 15.951 16.078 16.744 16.637 17.463 17.249 16.744 16.642 16.172 16.307 16.906 16.774 17.463 17.280 16.774 16.698 16.203 16.307 16.873 16.774 17.463 17.269 16.845 16.749 16.353 16.485 16.998 16.873 17.463 17.297 16.873 16.802 16.380 16.485 16.967 16.873 17.463 17.282 16.919 16.828 16.490 16.612 17.064 16.947 17.463 17.310 16.947 16.878 16.518 16.612 17.036 16.947 17.463 18.512 17.353 17.130 15.979 16.307 17.691 17.399 19.050 18.677 0.7288 17.353 17.203 15.979 16.307 17.595 17.399 19.050 18.722 17.399 17.287 16.025 16.307 17.544 17.399 19.050 18.717 17.633 17.493 16.487 16.764 17.859 17.676 19.050 18.760 17.676 17.572 16.530 16.764 18.042 17.676 19.050 18.750 17.833 17.704 16.853 17.094 18.042 17.871 19.050 18.651 17.981 17.790 17.120 17.323 18.268 18.019 19.050 18.773 17.981 17.854 17.120 17.323 18.184 18.019 19.050

　　UNRc Minor Dia

　　陈拓延2004共33页第9页

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　Min

　　3A 3B 3 /4-18 UNS 2A 2B 3 /4-20 UNEF 2A 2B 3 /4-20 UNEF 3A 3B 3 /4-24 UNS 2A 2B 3 /4-27 UNS 2A 2B 3 /4-28 UN 2A 2B 3 /4-28 UN 3A 3B 3 /4-32 UN 2A 2B 3 /4-32 UN 3A 3B 13 /16-12 UN 2A 2B 13 /16-12 UN 3A 3B 13 /16-16 UN 2A 2B 13 /16-16 UN 3A 3B 13 /16-20 UNEF 2A 2B 13 /16-20 UNEF 3A 3B 13 /16-28 UN 2A 2B 13 /16-28 UN 3A 3B 13 /16-32 UN 2A 2B 13 /16-32 UN 3A 3B 7 /8-9 UNC 1A 1B

　　/4-16 UNF

　　0 0 0.03556 0 0.03302 0 0 0 0.03048 0 0.03048 0 0.03048 0 0 0 0.02794 0 0 0 0.04318 0 0 0 0.0381 0 0 0 0.03302 0 0 0 0.03048 0 0 0 0.02794 0 0 0 0.04826 0

　　19.050 17.546 19.014 17.856 19.017 17.958 19.050 17.874 19.020 18.161 19.020 18.263 19.020 18.288 19.050 18.227 19.022 18.390 19.050 18.336 20.594 18.796 20.638 18.616 20.599 19.279 20.638 19.134 20.604 19.558 20.638 19.461 20.607 19.863 20.638 19.815 20.610 19.964 20.638 19.924 22.177 19.761

　　18.811 17.323 18.793 17.526 18.811 17.678 18.844 17.678 18.837 17.907 18.849 18.034 18.854 18.059 18.885 18.059 18.870 18.186 18.898 18.186 20.305 18.339 20.348 18.339 20.361 18.923 20.399 18.923 20.399 19.253 20.432 19.253 20.442 19.660 20.472 19.660 20.457 19.787 20.485 19.787 21.648 19.177

　　Maxa Major Min Pitch Dia(Min) Pitch 18.019 17.922 17.158 18.143 18.019 19.050 18.098 17.981 17.336 18.285 18.133 19.050 18.191 18.080 17.506 18.369 18.225 19.050 18.225 18.141 17.539 18.334 18.225 19.050 18.331 18.227 17.760 18.496 18.362 19.050 18.407 18.308 17.899 18.567 18.438 19.050 18.430 18.334 17.937 18.588 18.461 19.050 18.461 18.387 17.968 18.555 18.461 19.050 18.506 18.415 18.070 18.654 18.534 19.050 18.534 18.466 18.105 18.626 18.534 19.050 19.220 19.080 18.075 19.446 19.263 20.638 19.263 19.159 18.118 19.401 19.263 20.638 19.568 19.444 18.707 19.766 19.606 20.638 19.606 19.515 18.745 19.726 19.606 20.638 19.779 19.667 19.093 19.957 19.812 20.638 19.812 19.728 19.126 19.921 19.812 20.638 20.018 19.921 19.525 20.175 20.048 20.638 20.048 19.975 19.555 20.142 20.048 20.638 20.094 20.003 19.665 20.241 20.122 20.638 20.122 20.053 19.693 20.213 20.122 20.638 20.343 20.102 18.816 20.704 20.391 22.225

　　UNRc Minor Dia

　　陈拓延2004共33页第10页

　　7 7

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　/8-9 UNC /8-9 UNC

　　/8-10 UNS /8-12 UN /8-12 UN

　　/8-14 UNF /8-14 UNF /8-14 UNF /8-16 UN /8-16 UN

　　/8-18 UNS

　　/8-20 UNEF /8-20 UNEF /8-24 UNS /8-27 UNS /8-28 UN /8-28 UN /8-32 UN /8-32 UN /16-12 UN /16-12 UN

　　2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 1A 1B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 2A 2B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B

　　0.04826 0 0 0 0.04572 0 0.04318 0 0 0 0.04064 0 0.04064 0 0 0 0.0381 0 0 0 0.03556 0 0.03302 0 0 0 0.03048 0 0.03048 0 0.03048 0 0 0 0.02794 0 0 0 0.04318 0 0 0

　　22.177 19.761 22.225 19.510 22.179 20.015 22.182 20.396 22.225 20.188 22.184 20.676 22.184 20.676 22.225 20.493 22.187 20.853 22.225 20.721 22.189 21.031 22.192 21.133 22.225 21.049 22.195 21.336 22.195 21.438 22.195 21.463 22.225 21.402 22.197 21.565 22.225 21.511 23.769 21.971 23.813 21.781

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 0.8523 21.824 20.343 20.183 18.816 19.177 20.599 20.391 22.225 21.872 20.391 20.272 18.865 19.177 20.546 20.391 22.225 21.852 20.528 20.376 19.157 19.482 20.772 20.574 22.225 21.892 20.808 20.668 19.662 19.939 21.034 20.851 22.225 21.935 20.851 20.747 19.705 19.939 20.988 20.851 22.225 21.791 21.006 20.800 20.025 20.269 21.316 21.046 22.225 21.923 21.006 20.869 20.025 20.269 21.224 21.046 22.225 21.963 21.046 20.942 20.066 20.269 21.181 21.046 22.225 21.948 21.156 21.031 20.066 20.498 21.354 21.194 22.225 21.986 21.194 21.102 20.333 20.498 21.313 21.194 22.225 21.968 21.273 21.156 20.511 20.701 21.460 21.308 22.225 21.986 21.366 21.255 20.681 20.853 21.544 21.400 22.225 22.019 21.400 21.316 20.714 20.853 21.509 21.400 22.225 22.012 21.506 21.402 20.935 21.082 21.671 21.537 22.225 22.024 21.582 21.483 21.074 21.209 21.742 21.613 22.225 22.029 21.605 21.509 21.112 21.234 21.763 21.636 22.225 22.060 21.636 21.562 21.143 21.234 21.730 21.636 22.225 22.045 21.681 21.590 21.252 21.361 21.829 21.709 22.225 22.073 21.709 21.641 21.280 21.361 21.801 21.709 22.225 23.480 22.395 22.250 21.250 21.514 22.626 22.438 23.813 23.523 22.438 22.334 21.293 21.514 22.578 22.438 23.813

　　UNRc Minor Dia

　　陈拓延2004共33页第11页

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　2A 2B 15 /16-16 UN 3A 3B 15 /16-20 UNEF 2A 2B 15 /16-20 UNEF 3A 3B 15 /16-28 UN 2A 2B 15 /16-28 UN 3A 3B 15 /16-32 UN 2A 2B 15 /16-32 UN 3A 3B 1-8 UNC 1A 1B 1-8 UNC 2A 2B 1-8 UNC 3A 3B 1-10 UNS 2A 2B 1-12 UNF 1A 1B 1-12 UNF 2A 2B 1-12 UNF 3A 3B 1-14UNS 1A 1B 1-14UNS 2A 2B 1-14UNS 3A 3B 1-16 UN 2A 2B 1-16 UN 3A 3B 1-18 UNS 2A 2B 1-20 UNEF 2A

　　/16-16 UN

　　0.0381 0 0 0 0.03556 0 0 0 0.03048 0 0 0 0.02794 0 0 0 0.0508 0 0.0508 0 0 0 0.04572 0 0.04572 0 0.04572 0 0 0 0.04318 0 0.04318 0 0 0 0.0381 0 0 0 0.03556 0 0.03556

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 23.774 23.536 22.743 22.616 21.882 22.454 22.098 22.946 22.781 23.813 23.813 23.574 22.781 22.687 21.920 22.309 22.098 22.906 22.781 23.813 23.777 23.571 22.951 22.837 22.266 22.733 22.428 23.137 22.987 23.813 23.813 23.607 22.987 22.901 22.301 22.636 22.428 23.099 22.987 23.813 23.782 23.617 23.193 23.091 22.700 23.038 22.835 23.355 23.223 23.813 23.813 23.647 23.223 23.147 22.730 22.990 22.835 23.322 23.223 23.813 23.785 23.632 23.269 23.172 22.840 23.139 22.962 23.421 23.297 23.813 23.813 23.660 23.297 23.226 22.868 23.099 22.962 23.391 23.297 23.813 25.349 24.778 23.287 23.030 21.570 22.606 21.971 23.673 23.338 25.400 25.349 24.968 0.9755 23.287 23.114 21.570 22.606 21.971 23.561 23.338 25.400 25.400 25.019 23.338 23.208 21.620 22.344 21.971 23.505 23.338 25.400 25.354 25.027 23.703 23.546 22.332 23.190 22.657 23.952 23.749 25.400 25.354 24.917 23.980 23.757 22.835 23.571 23.114 24.315 24.026 25.400 25.354 25.065 23.980 23.830 22.835 23.571 23.114 24.219 24.026 25.400 25.400 25.110 24.026 23.914 22.880 23.363 23.114 24.171 24.026 25.400 25.357 24.963 24.178 23.965 23.195 23.825 23.444 24.498 24.221 25.400 25.357 25.095 24.178 24.036 23.195 23.825 23.444 24.407 24.221 25.400 25.400 25.138 24.221 24.115 23.238 23.660 23.444 24.359 24.221 25.400 25.362 25.123 24.331 24.204 23.470 24.028 23.673 24.534 24.369 25.400 25.400 25.161 24.369 24.275 23.508 23.896 23.673 24.493 24.369 25.400 25.364 25.143 24.448 24.328 23.686 24.206 23.876 24.641 24.483 25.400 25.364 25.159 24.539 24.425 23.853 陈拓延2004共33页第12页

　　Min Major Min Minor

　　UNRc Minor Dia

　　Nominal Size, TPI, Series Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. 1-20 UNEF

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　2B 3A 3B 1-24 UNS 2A 2B 1-27 UNS 2A 2B 1-28 UN 2A 2B 1-28 UN 3A 3B 1-32 UN 2A 2B 1-32 UN 3A 3B 1 1 /16-8 UN 2A 2B 1 1 /16-8 UN 3A 3B 1 1 /16-12 UN 2A 2B 1 1 /16-12 UN 3A 3B 1 1 /16-16 UN 2A 2B 1 1 /16-16 UN 3A 3B 1 1 /16-18 UNEF 2A 2B 11/16-18 UNEF 3A Int. 3B Ext. 11/16-20 UN 2A Int. 2B 1 Ext. 1 /16-20 UN 3A Int. 3B 1 Ext. 1 /16-28 UN 2A Int. 2B 1 Ext. 1 /16-28 UN 3A Int. 3B 1 Ext. 1 /8-7 UNC 1A Int. 1B 1 Ext. 1 /8-7 UNC 2A

　　0 0 0 0.03302 0 0.03048 0 0.03048 0 0 0 0.02794 0 0 0 0.0508 0 0 0 0.04318 0 0 0 0.0381 0 0 0 0.03556 0 0 0 0.03556 0 0 0 0.03048 0 0 0 0.05588 0 0.05588

　　24.308 25.400 24.224 25.367 24.511 25.370 24.613 25.370 24.638 25.400 24.577 25.372 24.740 25.400 24.686 26.937 24.181 26.988 23.932 26.944 25.146 26.988 24.950 26.949 25.629 26.988 25.484 26.952 25.781 26.988 25.667 26.952 25.908 26.988 25.811 26.957 26.213 26.988 26.165 28.519 25.349 28.519

　　24.028 25.194 24.028 25.184 24.257 25.199 24.384 25.204 24.409 25.235 24.409 25.220 24.536 25.248 24.536 26.556 23.546 26.607 23.546 26.655 24.689 26.698 24.689 26.711 25.273 26.749 25.273 26.731 25.451 26.767 25.451 26.746 25.603 26.782 25.603 26.792 26.010 1.422 26.010 27.894 24.638 28.103

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 24.724 24.575 25.400 24.575 24.488 23.889 24.686 24.575 25.400 24.679 24.572 24.107 24.851 24.712 25.400 24.757 24.656 24.249 24.920 24.788 25.400 24.780 24.679 24.287 24.943 24.811 25.400 24.811 24.735 24.318 24.910 24.811 25.400 24.856 24.760 24.427 25.009 24.884 25.400 24.884 24.813 24.455 24.978 24.884 25.400 24.874 24.702 23.157 25.151 24.925 26.988 24.925 24.795 23.208 25.095 24.925 26.988 25.570 25.425 24.425 25.801 25.613 26.988 25.613 25.507 24.468 25.753 25.613 26.988 25.918 25.791 25.057 26.121 25.956 26.988 25.956 25.862 25.095 26.081 26.071 26.988 26.035 25.916 25.273 26.228 26.071 26.988 26.071 25.979 25.309 26.187 26.071 26.988 26.126 26.012 25.441 26.312 26.162 26.988 26.162 26.076 25.476 26.274 26.162 26.988 26.368 26.266 25.875 26.530 0.998 26.988 26.398 26.322 25.905 26.497 26.398 26.988 26.162 25.885 24.199 26.457 26.218 28.575 1.0982 26.162 25.979 24.199

　　UNRc Minor Dia

　　陈拓延2004共33页第13页

　　Nominal Size, TPI, Series Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. 1 /8-7 UNC 11/8-8 UN 1 /8-8 UN

　　1 1 /8-10 UNS 1 1 1

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　1 /8-12 UNF 11/8-12 UNF 11/8-12 UNF 11/8-14 UNS 11/8-16 UN 11/8-16 UN 11/8-18 UNEF

　　1 1 /8-18 UNEF

　　11/8-20 UN 11/8-20 UN

　　Ext. 11/8-24 UNS Int. Ext. 11/8-28 UN Int. Ext. 11/8-28 UN Int. Ext. 13/16-8 UN Int. Ext. 13/16-8 UN Int. Ext. 13/16-12 UN Int. Ext. 13/16-12 UN

　　2B 3A 3B 2A 2B 3A 3B 2A 2B 1A 1B 2A 2B 3A 3B 2A 2B 2A 2B 3A 2B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A

　　0 0 0 0.05334 0 0 0 0.04572 0 0.04572 0 0.04572 0 0 0 0.04064 0 0.0381 0 0 0 0.03556 0 0 0 0.03556 0 0 0 0.03302 0 0.03048 0 0 0 0.05334 0 0 0 25.4432 0 0

　　25.349 28.575 25.083 28.522 25.781 28.575 25.519 28.529 26.365 28.529 26.746 28.529 26.746 28.575 26.538 28.534 27.026 28.537 27.203 28.575 27.071 28.539 27.381 28.575 27.254 28.539 27.483 28.575 27.399 28.542 27.686 28.545 27.813 28.575 27.752 30.109 27.356 30.163 27.107 30.119 28.321 30.155

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 24.638 26.398 26.218 28.575 28.158 26.218 26.081 24.254 24.638 24.498 26.218 28.575 1.1004 28.141 26.459 26.284 24.742 25.146 26.741 26.513 28.575 28.194 26.513 26.380 24.795 25.146 26.683 26.513 28.575 28.202 26.878 26.721 25.507 25.832 27.127 26.924 28.575 28.092 27.155 26.927 26.010 26.289 27.498 27.201 28.575 28.240 27.155 27.003 26.010 26.289 27.399 27.201 28.575 28.285 27.201 27.087 26.055 26.289 27.351 27.201 28.575 28.273 27.356 27.221 26.375 26.619 27.572 27.396 28.575 28.298 27.506 27.379 26.645 26.848 27.709 27.544 28.575 28.336 27.544 27.450 26.683 26.848 27.668 27.544 28.575 28.318 27.623 27.503 26.861 27.051 27.816 27.658 28.575 28.354 27.658 27.567 26.896 27.051 27.775 27.658 28.575 28.334 27.714 27.600 27.028 27.203 27.899 27.750 28.575 28.369 27.750 27.663 27.064 27.203 27.861 27.750 28.575 28.359 27.854 27.747 27.285 27.432 28.026 27.887 28.575 28.379 27.955 27.854 27.462 27.584 28.118 27.986 28.575 28.410 27.986 27.910 27.493 27.584 28.085 27.986 28.575 29.728 28.047 27.869 26.330 26.721 28.331 28.100 30.163 29.782 28.100 27.968 26.383 26.721 28.273 28.100 30.163 29.830 28.745 28.598 27.600 27.864 28.979 28.788 30.163 29.873 28.788 28.679 27.643

　　UNRc Minor Dia

　　陈拓延2004共33页第14页

　　Nominal Size, TPI, Series Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. 1 /16-16 UN 13/16-16 UN 1 /16-18 UNEF

　　3 3

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　3B 2A 2B 3A 3B 2B

　　1 /16-18 UNEF

　　1 /16-20 UN

　　1 /16-28 UN

　　1 /16-28 UN 11/4-7 UNC

　　3B 1A 1B 11/4-7 UNC 2A 2B 1 1 /4-7 UNC 3A 3B 1 1 /4-8 UN 2A 2B 1 1 /4-8 UN 3A 3B 1 1 /4-10 UNS 2A Int. 2B 1 Ext. 1 /4-12 UNF 1A Int. 1B 1 Ext. 1 /4-12 UNF 2A Int. 2B Ext. 11/4-12 UNF 3A Int. 3B Ext. 11/4-14 UNS 2A Int. 2B 1 Ext. 1 /4-16 UN 2A Int. 2B 1 Ext. 1 /4-16 UN 3A Int. 3B 1 Ext. 1 /4-18 UNEF 2A

　　0 0.0381 0 0 0 0.0381 0 0 0 0.03556 0 0 0 0.03048 0 0 0 0.05588 0 0.05588 0 0 0 0.05334 0 0 0 0.04826 0 0.04572 0 0.04572 0 0 0 0.04064 0 0.0381 0 0 0 0.0381

　　28.125 30.124 28.804 30.163 28.659 30.124 28.956 30.163 28.842 30.127 29.083 30.163 28.986 30.132 29.388 30.163 29.340 31.694 28.524 31.694 28.524 31.750 28.258 31.697 28.956 31.750 28.694 31.702 29.540 31.704 29.921 31.704 29.921 31.750 29.713 31.709 30.175 31.712 30.378 31.750 30.246 31.712

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 27.864 28.931 28.788 30.163 29.886 29.093 28.964 28.232 28.448 29.299 29.131 30.163 29.924 29.131 29.035 28.270 28.448 29.258 29.131 30.163 29.903 29.207 29.083 28.445 28.626 29.406 29.246 30.163 29.942 29.246 29.154 28.484 28.626 29.365 29.246 30.163 29.921 29.301 29.182 28.616 28.778 29.492 29.337 30.163 29.957 29.337 29.248 28.651 28.778 29.451 29.337 30.163 29.967 29.543 29.439 29.050 29.185 29.708 29.573 30.163 29.997 29.573 4.094 29.080 29.185 29.675 29.573 30.163 31.069 29.337 29.055 27.374 27.813 29.759 29.393 31.750 31.278 1.2232 29.337 29.149 27.374 27.813 29.637 29.393 31.750 31.333 29.393 29.253 27.429 27.813 29.576 29.393 31.750 31.316 1.2254 29.634 29.456 27.917 28.321 29.921 29.688 31.750 31.369 29.688 29.553 27.970 28.321 29.863 29.688 31.750 31.374 30.051 29.891 28.679 29.007 30.307 30.099 31.750 31.267 30.330 30.096 29.185 29.464 30.681 30.376 31.750 31.415 30.330 30.173 29.185 29.464 30.579 30.376 31.750 31.460 30.376 30.259 29.230 29.464 30.528 30.376 31.750 31.448 30.531 30.394 29.550 29.794 30.749 30.571 31.750 31.473 30.681 30.551 29.820 30.023 30.886 30.719 31.750 31.511 30.719 30.622 29.858 30.023 30.846 30.719 31.750 31.491 30.795 30.671 30.033

　　UNRc Minor Dia

　　陈拓延2004共33页第15页

　　Nominal Size, TPI, Series Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. 1 /4-18 UNEF 11/4-20 UN 1 /4-20 UN

　　1 1 /4-24 UNS 1 1 1

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　1 /4-28 UN 11/4-28 UN 15/16-8 UN 15/16-8 UN 15/16-12 UN 15/16-12 UN 15/16-16 UN

　　5 1 /16-16 UN

　　15/16-18 UNEF

　　Ext. 15/16-18 UNEF Int. Ext. 15/16-20 UN Int. Ext. 15/16-20 UN Int. Ext. 15/16-28 UN Int. Ext. 15/16-28 UN Int. Ext. 13/8-6 UNC Int. Ext. 13/8-6 UNC Int. Ext. 13/8-6 UNC

　　2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 1A 1B 2A 2B 3A

　　0 0 0 0.03556 0 0 0 0.03302 0 0.03048 0 0 0 0.05334 0 0 0 0.04318 0 0 0 0.0381 0 0 0 0.0381 0 0 0 0.03556 0 0 0 0.03048 0 0 0 0.06096 0 0.06096 0 0

　　30.556 31.750 30.429 31.714 30.658 31.750 30.574 31.717 30.861 31.720 30.988 31.585 30.927 33.284 30.531 33.338 30.282 33.294 31.496 33.338 31.300 33.299 31.979 33.338 31.834 33.299 32.131 33.338 32.017 33.302 32.258 33.338 32.161 33.307 32.563 33.338 32.515 34.864 56.515 34.864 56.515 34.925

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 30.226 30.993 30.833 31.750 31.529 30.833 30.742 30.071 30.226 30.952 30.833 31.750 31.509 30.889 30.770 30.203 30.378 31.079 30.925 31.750 31.544 30.925 30.836 30.239 30.378 31.039 30.925 31.750 31.534 31.029 30.919 30.457 30.607 31.204 31.062 31.750 31.554 31.130 31.026 30.637 30.759 31.295 31.161 31.750 31.585 31.161 31.082 30.668 30.759 31.262 31.161 31.750 32.903 31.222 31.041 29.505 29.896 31.509 31.275 33.338 32.957 31.275 31.140 29.558 29.896 31.450 31.275 33.338 33.005 31.920 31.773 30.775 31.039 32.154 31.963 33.338 33.048 31.963 31.854 30.818 31.039 32.106 31.963 33.338 33.061 32.268 32.139 31.407 31.623 32.474 32.306 33.338 33.099 32.306 32.210 31.445 31.623 32.433 32.306 33.338 33.078 32.382 32.258 31.620 31.801 32.581 32.421 33.338 33.117 32.421 32.329 31.659 31.801 32.540 32.421 33.338 33.096 32.476 32.357 31.791 31.953 32.667 32.512 33.338 33.132 32.512 32.423 31.826 31.953 32.626 32.512 33.338 33.142 32.718 32.614 32.225 32.360 32.883 32.748 33.338 33.172 32.748 32.669 32.255 32.360 32.850 32.748 33.338 34.171 32.113 31.808 29.825 30.353 32.568 32.174 34.925 34.402 1.3453 32.113 31.910 29.825 30.353 32.438 32.174 34.925 34.463 32.174 32.022 29.886

　　UNRc Minor Dia

　　陈拓延2004共33页第16页

　　Nominal Size, TPI, Series Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. 13/8-24 UNS Int. Ext. 13/8-28 UN Int. Ext. 13/8-28 UN Int. Ext. 17/16-6 UN Int. Ext. 17/16-6 UN Int. Ext. 17/16-8 UN Int. Ext. 17/16-8 UN Int. Ext. 17/16-12 UN 1 /8-8 UN 13/8-8 UN 1 /8-10 UNS

　　3 1 /8-12 UNF 3 3 3

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　1 /8-12 UNF 13/8-12 UNF 13/8-14 UNS 13/8-16 UN 13/8-16 UN 13/8-18 UNEF 13/8-18 UNEF

　　3 1 /8-20 UN

　　13/8-20 UN

　　3B 2A 2B 3A 3B 2A 2B 1A 1B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A

　　0 0.05588 0 0 0 0.04826 0 0.04826 0 0.04826 0 0 0 0.04064 0 0.0381 0 0 0 0.0381 0 0 0 0.03556 0 0 0 0.03302 0 0.03048 0 0 0 0.06096 0 0 0 0.05588 0 0 0 0.04572

　　30.851 34.869 32.131 34.925 31.869 34.877 32.715 34.877 33.096 34.877 33.096 34.925 32.888 34.884 33.376 34.887 33.553 34.925 33.421 34.887 33.731 34.925 33.604 34.889 33.833 34.925 33.749 34.892 34.036 34.895 34.163 34.925 34.102 36.452 32.715 36.513 32.438 36.457 33.706 36.513 33.457 36.467

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 30.353 32.372 32.174 34.925 1.3503 34.488 32.807 32.624 31.090 31.496 33.099 32.863 34.925 34.544 32.863 32.725 31.145 31.496 33.040 32.863 34.925 34.549 33.226 33.066 31.854 32.182 33.482 33.274 34.925 34.440 33.503 33.264 32.357 32.639 33.863 33.551 34.925 34.587 33.503 33.343 32.357 32.639 33.759 33.551 34.925 34.635 33.551 33.431 32.405 32.639 33.706 33.551 34.925 34.623 33.706 33.569 32.725 32.969 33.924 33.746 34.925 34.648 33.856 33.726 32.995 33.198 34.061 33.894 34.925 34.686 33.894 33.797 33.033 33.198 34.021 33.894 34.925 34.666 33.970 33.846 33.208 33.401 34.168 34.008 34.925 34.704 34.008 33.917 33.246 33.401 34.127 34.008 34.925 34.684 34.064 33.945 33.378 33.553 34.254 34.100 34.925 34.719 34.100 34.011 33.414 33.553 34.214 34.100 34.925 34.709 34.204 34.094 33.632 33.782 34.379 34.237 34.925 34.729 34.305 34.201 33.812 33.934 34.470 34.336 34.925 34.760 34.336 34.257 33.843 33.934 34.437 34.336 34.925 35.989 33.701 33.498 31.412 31.928 34.026 33.762 36.513 36.050 33.762 33.609 31.473 31.928 33.960 33.762 36.513 36.076 34.394 34.211 32.677 33.071 34.689 34.450 36.513 36.132 34.450 34.313 32.733 33.071 34.630 34.450 36.513 36.177 35.093 34.943 33.947

　　UNRc Minor Dia

　　陈拓延2004共33页第17页

　　7 1 /16-18 UNEF 7 7 7

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　1 /16-18 UNEF 17/16-20 UN 17/16-20 UN 17/16-28 UN 17/16-28 UN 11/2-6 UNC 11/2-6 UNC

　　1 1 /2-6 UNC

　　11/2-8 UN 11/2-8 UN 11/2-10 UNS 11/2-12 UNF 11/2-12 UNF 11/2-12 UNF 11/2-14 UNS 11/2-16 UN 11/2-16 UN

　　2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 1A 1B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 1A 1B 2A 2B 3A 3B 2A 2B 2A 2B 3A

　　0 0 0 0.04064 0 0 0 0.0381 0 0 0 0.03556 0 0 0 0.03302 0 0 0 0.06096 0 0.06096 0 0 0 0.05588 0 0 0 0.04826 0 0.04826 0 0.04826 0 0 0 0.04318 0 0.04064 0 0

　　34.671 36.513 34.475 36.472 35.154 36.513 35.009 36.474 35.306 36.513 35.192 36.477 35.433 36.513 35.336 36.479 35.738 36.513 35.690 38.039 34.290 38.039 34.290 38.100 34.026 38.044 35.306 38.100 35.044 38.052 35.890 38.052 36.271 38.052 36.271 38.100 36.063 38.057 36.525 38.059 36.728 38.100

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 34.214 35.331 35.138 36.513 36.223 35.138 35.027 33.993 34.214 35.283 35.138 36.513 36.233 35.441 35.309 34.580 34.798 35.654 35.481 36.513 36.274 35.481 35.382 34.620 34.798 35.611 35.481 36.513 36.253 35.557 35.430 34.795 34.976 35.761 35.596 36.513 36.292 35.596 35.502 34.834 34.976 35.717 35.596 36.513 36.271 35.651 35.530 34.966 35.128 35.844 35.687 36.513 36.307 35.687 35.596 35.001 35.128 35.804 35.687 36.513 36.314 35.890 35.784 35.397 35.535 36.063 35.923 36.513 36.347 35.923 35.844 35.430 35.535 36.027 35.923 36.513 37.346 35.288 34.981 33.000 33.528 35.751 35.349 38.100 37.577 1.4703 35.288 35.082 33.000 33.528 35.616 35.349 38.100 37.638 35.349 35.194 33.061 33.528 35.550 35.349 38.100 37.663 1.4753 35.982 35.796 34.265 34.671 36.279 36.038 38.100 37.719 36.038 35.898 34.320 34.671 36.218 36.038 38.100 37.724 36.401 36.238 35.029 35.357 36.660 36.449 38.100 37.615 36.678 36.434 35.532 35.814 37.043 36.726 38.100 37.762 36.678 36.515 35.532 35.814 36.937 36.726 38.100 37.810 36.726 36.604 35.580 35.814 36.886 36.726 38.100 37.795 36.878 36.739 35.898 36.144 37.104 36.921 38.100 37.821 37.028 36.896 36.167 36.373 37.241 37.069 38.100 37.861 37.069 36.970 36.208

　　UNRc Minor Dia

　　陈拓延2004共33页第18页

　　Nominal Size, TPI, Series Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. 19/16-12 UN 19/16-16 UN 19/16-16 UN 19/16-18 UNEF 19/16-18 UNEF 19/16-20 UN 19/16-20 UN 15/8-6 UN 15/8-6 UN 1 /2-18 UNEF 11/2-18 UNEF 1 /2-20 UN

　　1 1 /2-20 UN 1 1 1

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　Min

　　1 /2-24 UNS 11/2-28 UN 11/2-28 UN 19/16-6 UN 19/16-6 UN 19/16-8 UN 19/16-8 UN

　　9 1 /16-12 UN

　　3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A

　　0 0.0381 0 0 0 0.03556 0 0 0 0.03302 0 0.03302 0 0 0 0.06096 0 0 0 0.05588 0 0 0 0.04572 0 0 0 0.04064 0 0 0 0.0381 0 0 0 0.03556 0 0 0 0.0635 0 0

　　36.596 38.062 36.881 38.100 36.779 38.064 37.008 38.100 36.924 38.067 37.211 38.067 37.338 38.100 113.477 39.627 35.890 39.688 35.613 39.632 36.881 39.688 36.632 39.642 37.846 39.688 37.650 39.647 38.329 39.688 38.184 39.649 38.481 39.688 38.367 39.652 38.608 39.688 38.511 41.212 37.465 41.275

　　36.373 37.841 36.576 37.879 36.576 37.859 36.728 37.894 36.728 37.884 36.957 37.902 37.109 37.935 37.109 39.164 35.103 39.225 35.103 39.251 36.246 39.307 36.246 39.352 37.389 39.398 37.389 39.408 37.973 39.449 37.973 39.428 38.151 39.467 38.151 39.446 38.303 39.482 38.303 40.749 36.703 40.813

　　Maxa Major Min Pitch Dia(Min) Pitch 37.198 37.069 38.100 37.145 37.018 36.383 37.348 37.183 38.100 37.183 37.089 36.421 37.305 37.183 38.100 37.239 37.117 36.553 37.432 37.275 38.100 37.275 37.183 36.589 37.391 37.275 38.100 37.379 37.267 38.077 37.559 37.412 38.100 37.478 37.371 36.985 37.650 37.511 38.100 37.511 37.432 37.018 37.615 37.511 38.100 36.876 36.667 34.587 37.206 36.937 39.688 36.937 36.782 34.648 37.140 36.937 39.688 37.569 37.381 35.852 37.869 37.625 39.688 37.625 37.485 35.908 37.808 37.625 39.688 38.268 38.118 37.122 38.506 38.313 39.688 38.313 38.202 37.168 38.458 38.313 39.688 38.616 38.484 37.755 38.829 38.656 39.688 38.656 38.557 37.795 38.786 38.656 39.688 38.732 38.605 37.970 38.936 38.771 39.688 38.771 38.677 38.009 38.892 38.771 39.688 38.826 38.705 38.141 39.019 38.862 39.688 38.862 38.771 38.176 38.979 38.862 39.688 38.461 38.252 36.185 38.796 38.524 41.275 38.524 38.367 36.248

　　UNRc Minor Dia

　　陈拓延2004共33页第19页

　　5 1 /8-12 UN 5 5 5

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　1 /8-12 UN 15/8-14 UNS 15/8-16 UN 15/8-16 UN 15/8-18 UNEF 15/8-18 UNEF 15/8-20 UN 15/8-20 UN 15/8-24 UNS 111/16-6 UN 111/16-6 UN 111/16-8 UN 111/16-8 UN 111/16-12 UN 111/16-12 UN 111/16-16 UN

　　Ext. 111/16-16 UN

　　3B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A

　　0 0.05588 0 0 0 0.04826 0 0.04572 0 0 0 0.04318 0 0.04064 0 0 0 0.0381 0 0 0 0.03556 0 0 0 0.03302 0 0.0635 0 0 0 0.05588 0 0 0 0.04572 0 0 0 0.04064 0 0

　　37.201 41.219 38.481 41.275 38.219 41.227 39.065 41.229 39.446 41.275 39.238 41.232 39.726 41.234 39.903 41.275 39.771 41.237 40.081 41.275 39.954 41.239 40.183 41.275 40.099 41.242 40.386 42.799 39.065 42.863 38.788 42.807 40.056 42.863 39.807 42.817 41.021 42.863 40.825 42.822 41.504 42.863

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 36.703 38.727 38.524 41.275 1.6003 40.838 39.157 38.969 37.551 37.846 39.459 39.213 41.275 40.894 39.213 39.070 37.607 37.846 39.395 39.213 41.275 40.899 39.576 39.413 38.204 38.532 39.835 39.624 41.275 40.940 39.855 39.705 38.710 38.989 40.094 39.901 41.275 40.985 39.901 39.789 38.755 38.989 40.046 39.901 41.275 40.970 40.053 39.914 39.073 39.319 40.279 40.096 41.275 40.996 40.203 40.071 39.342 39.548 40.416 40.244 41.275 41.036 40.244 40.145 39.383 39.548 40.373 40.244 41.275 41.016 40.320 40.193 39.558 39.751 40.523 40.358 41.275 41.054 40.358 40.264 39.596 39.751 40.480 40.358 41.275 41.034 40.414 40.292 39.728 39.903 40.607 40.450 41.275 41.069 40.450 40.358 39.764 39.903 40.566 40.450 41.275 41.059 40.554 40.442 39.982 40.132 40.734 40.587 41.275 42.337 40.048 39.837 37.760 38.278 40.386 40.112 42.863 42.400 40.112 39.954 37.823 38.278 40.317 40.112 42.863 42.426 40.744 40.554 39.027 39.421 41.046 40.800 42.863 42.482 40.800 40.658 39.083 39.421 40.985 40.800 42.863 42.527 41.443 41.290 40.297 40.564 41.686 41.488 42.863 42.573 41.488 41.374 40.343 40.564 41.636 41.488 42.863 42.583 41.791 41.656 40.930 41.148 42.007 41.831 42.863 42.624 41.831 41.730 40.970

　　UNRc Minor Dia

　　陈拓延2004共33页第20页

　　Nominal Size, TPI, Series Int. Ext. 111/16-18 UNEF Int. Ext. 111/16-18 UNEF Int. Ext. 111/16-20 UN Int. Ext. 111/16-20 UN Int. Ext. 13/4-5 UNC Int. Ext. 13/4-5 UNC Int. Ext. 13/4-5 UNC Int. Ext. 13/4-6 UN Int. Ext. 13/4-6 UN Int. Ext. 13/4-8 UN Int. Ext. 13/4-8 UN

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　3B 2A 2B 3A 3B 2A 2B 3A 3B 1A 1B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A Int. 3B 3 Ext. 1 /4-10 UNS 2A Int. 2B 3 Ext. 1 /4-12 UN 2A Int. 2B 3 Ext. 1 /4-12 UN 3A Int. 3B 3 Ext. 1 /4-14 UNS 2A Int. 2B 3 Ext. 1 /4-16 UN 2A Int. 2B Ext. 13/4-16 UN 3A Int. 3B Ext. 13/4-18 UNS 2A Int. 2B 3 Ext. 1 /4-20 UN 2A Int. 2B 3 Ext. 1 /4-20 UN 3A Int. 3B 13 Ext. 1 /16-6 UN 2A

　　0 0.0381 0 0 0 0.0381 0 0 0 0.06858 0 0.06858 0 0 0 0.0635 0 0 0 0.05842 0 0 0 0.04826 0 0.04572 0 0 0 0.04318 0 0.04064 0 0 0 0.0381 0 0.0381 0 0 0 0.0635

　　41.359 42.824 41.656 42.863 41.542 42.824 41.783 42.863 41.686 44.381 39.827 44.381 39.827 44.450 39.561 44.387 40.640 44.450 40.376 44.392 41.656 44.450 41.394 44.402 42.240 44.404 42.621 44.450 42.413 44.407 42.875 44.409 43.078 44.450 42.946 44.412 43.256 44.412 43.358 44.450 43.274 45.974

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 41.148 41.963 41.831 42.863 42.603 41.907 41.778 41.145 41.326 42.113 41.946 42.863 42.642 41.946 41.849 41.184 41.326 42.070 41.946 42.863 42.619 41.999 41.877 41.313 41.478 42.197 42.037 42.863 42.657 42.037 41.946 41.351 41.478 42.156 42.037 42.863 43.599 41.082 40.742 38.334 38.964 41.593 41.151 44.450 43.861 1.7165 41.082 40.856 38.334 38.964 41.445 41.151 44.450 43.929 41.151 40.980 38.402 38.964 41.372 41.151 44.450 43.924 41.636 41.425 39.347 39.878 41.974 41.699 44.450 43.988 41.699 41.539 39.411 39.878 41.905 41.699 44.450 44.011 1.7252 42.329 42.139 40.612 41.021 42.636 42.388 44.450 44.069 42.388 42.245 40.670 41.021 42.575 42.388 44.450 44.074 42.751 42.586 41.379 41.707 43.012 42.799 44.450 44.115 43.030 42.878 41.885 42.164 43.274 43.076 44.450 44.160 43.076 42.962 41.930 42.164 43.223 43.076 44.450 44.145 43.228 43.086 42.245 42.494 43.457 43.271 44.450 44.171 43.378 43.244 42.517 42.723 43.594 43.419 44.450 44.211 43.419 43.317 42.558 42.723 43.551 43.419 44.450 44.191 43.495 43.365 42.733 42.926 43.701 43.533 44.450 44.206 43.586 43.464 42.901 43.078 43.785 43.625 44.450 44.244 43.625 43.533 42.939 43.078 43.744 43.625 44.450 45.512 43.223 43.010 40.935

　　UNRc Minor Dia

　　陈拓延2004共33页第21页

　　Nominal Size, TPI, Series Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. 1 /16-6 UN 113/16-8 UN 1 /16-8 UN

　　13 1 /16-12 UN 13 13 13

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　1 /16-12 UN 113/16-16 UN 113/16-16 UN 113/16-20 UN 113/16-20 UN 17/8-6 UN 17/8-6 UN

　　Int. Ext. 17/8-8 UN Int. Ext. 17/8-8 UN Int. Ext. 17/8-10 UNS Int. Ext. 17/8-12 UN Int. Ext. 17/8-12 UN Int. Ext. 17/8-14 UNS Int. Ext. 17/8-16 UN Int. Ext. 17/8-16 UN Int. Ext. 17/8-18 UNS Int. Ext. 17/8-20 UN

　　2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 2A

　　0 0 0 0.05842 0 0 0 0.04572 0 0 0 0.04064 0 0 0 0.0381 0 0 0 0.0635 0 0 0 0.05842 0 0 0 0.04826 0 0.04572 0 0 0 0.04318 0 0.04064 0 0 0 0.0381 0 0.0381

　　42.240 46.038 41.963 45.979 43.231 46.038 42.982 45.992 44.196 46.038 44.000 45.997 44.679 46.038 44.534 45.999 44.958 46.038 44.861 47.562 43.815 47.625 43.551 47.567 44.831 47.625 44.569 47.577 45.415 47.579 45.796 47.625 45.588 47.582 46.076 47.584 46.253 47.625 46.121 47.587 46.431 47.587

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 41.453 43.564 43.287 46.038 45.575 43.287 43.127 40.998 41.453 43.495 43.287 46.038 45.598 43.917 43.724 42.200 42.596 44.226 43.975 46.038 45.657 43.975 43.830 42.258 42.596 44.163 43.975 46.038 45.702 44.618 44.465 43.472 43.739 44.861 44.663 46.038 45.748 44.663 44.549 43.518 43.739 44.811 44.663 46.038 45.758 44.966 44.831 44.105 44.323 45.182 45.006 46.038 45.799 45.006 44.905 44.145 44.323 45.138 45.006 46.038 45.794 45.174 45.052 44.488 44.653 45.372 45.212 46.038 45.832 45.212 45.121 44.526 44.653 45.331 45.212 46.038 47.099 44.811 44.597 42.522 43.053 45.154 44.874 47.625 47.163 44.874 44.714 42.586 43.053 45.082 44.874 47.625 47.186 1.8502 45.504 45.309 43.787 44.196 45.817 45.563 47.625 47.244 45.563 45.418 43.845 44.196 45.753 45.563 47.625 47.249 45.926 45.761 44.554 44.882 46.187 45.974 47.625 47.290 46.205 46.053 45.060 45.339 46.449 46.251 47.625 47.335 46.251 46.137 45.105 45.339 46.398 46.251 47.625 47.320 46.403 46.261 45.423 45.669 46.632 46.446 47.625 47.346 46.553 46.419 45.692 45.898 46.769 46.594 47.625 47.386 46.594 46.492 45.733 45.898 46.726 46.594 47.625 47.366 46.670 46.540 45.908 46.101 46.876 46.708 47.625 47.381 46.761 46.639 46.076

　　UNRc Minor Dia

　　陈拓延2004共33页第22页

　　Nominal Size, TPI, Series Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. 115/16-20 UN Int. Ext. 2-41/2 UNC Int. Ext. 2-41/2 UNC Int. Ext. 2-41/2 UNC Int. Ext. 2-6 UN Int. Ext. 2-6 UN Int. Ext. 2-8 UN Int. Ext. 2-8 UN Int. Ext. 2-10 UNS Int. Ext. 2-12 UN Int. Ext. 2-12 UN 1 /8-20 UN 115/16-6 UN 1 /16-6 UN

　　15 1 /16-8 UN 15 15 7

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　1 /16-8 UN 115/16-12 UN 115/16-12 UN 115/16-16 UN 115/16-16 UN 115/16-20 UN

　　2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 1A 1B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 3A

　　0 0 0 0.06604 0 0 0 0.05842 0 0 0 0.04572 0 0 0 0.04064 0 0 0 0.0381 0 0 0 0.07366 0 0.07366 0 0 0 0.06604 0 0 0 0.05842 0 0 0 0.0508 0 0.04572 0 0

　　46.533 47.625 46.449 49.146 45.415 49.213 45.138 49.154 46.406 49.213 46.157 49.167 47.371 49.213 47.175 49.172 47.854 49.213 47.709 49.174 48.133 49.213 48.036 50.726 45.593 50.726 45.593 50.800 45.367 50.734 46.990 50.800 46.726 50.742 48.006 50.800 47.744 50.749 48.590 50.754 48.971 50.800

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 46.253 46.960 46.800 47.625 47.419 46.800 46.708 46.114 46.253 46.919 46.800 47.625 48.684 46.396 46.180 44.107 44.628 46.744 46.462 49.213 48.750 46.462 46.299 44.173 44.628 46.673 46.462 49.213 48.773 47.092 46.896 45.375 45.771 47.404 47.150 49.213 48.832 47.150 47.003 45.433 45.771 47.341 47.150 49.213 48.877 47.793 47.638 46.647 46.914 48.039 47.838 49.213 48.923 47.838 47.724 46.693 46.914 47.988 47.838 49.213 48.933 48.141 48.003 47.280 47.498 48.359 48.181 49.213 48.974 48.181 48.080 47.320 47.498 48.313 48.181 49.213 48.969 48.349 48.224 47.663 47.828 48.550 48.387 49.213 49.007 48.387 48.293 47.701 47.828 48.509 48.387 49.213 49.888 47.061 46.698 44.003 44.679 47.607 47.135 50.800 50.168 1.9641 47.061 46.820 44.003 44.679 47.450 47.135 50.800 50.241 47.135 46.954 44.077 44.679 47.371 47.135 50.800 50.272 47.983 47.765 45.695 46.228 48.331 48.049 50.800 50.338 48.049 47.887 45.761 46.228 48.260 48.049 50.800 50.361 1.9752 48.679 48.481 46.962 47.371 48.994 48.738 50.800 50.419 48.738 48.590 47.020 47.371 48.931 48.738 50.800 50.422 49.098 48.933 47.727 48.057 49.365 49.149 50.800 50.465 49.380 49.225 48.235 48.514 49.627 49.426 50.800 50.510 49.426 49.312 48.280

　　UNRc Minor Dia

　　陈拓延2004共33页第23页

　　Nominal Size, TPI, Series Int. Ext. 2-14 UNS Int. Ext. 2-16 UN Int. Ext. 2-16 UN Int. Ext. 2-18 UNS Int. Ext. 2-20 UN Int. Ext. 2-20 UN Int. Ext. 21/16-16 UNS Int. Ext. 21/16-16 UNS Int. Ext. 21/8-6 UN Int. Ext. 21/8-6 UN Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext.

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　3B 2A 2B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 1 2 /8-8 UN 2A 2B 1 2 /8-8 UN 3A 3B 1 2 /8-12 UN 2A 2B 1 2 /8-12 UN 3A 3B 1 2 /8-16 UN 2A 2B 1 2 /8-16 UN 3A 3B 21/8-20 UN 2A 2B 21/8-20 UN 3A 3B 3 2 /16-16 UNS 2A 2B 3 2 /16-16 UNS 3A 3B 1 1 2 /4-4 /2 UNC 1A

　　0 0.04318 0 0.04064 0 0 0 0.0381 0 0.0381 0 0 0 0.04064 0 0 0 0.06604 0 0 0 0.06096 0 0 0 0.04572 0 0 0 0.04064 0 0 0 0.0381 0 0 0 0.04064 0 0 0 0.07366

　　48.763 50.757 49.225 50.759 49.428 50.800 49.296 50.762 49.606 50.762 49.708 50.800 49.624 52.347 51.029 52.388 50.884 53.909 50.165 53.975 49.901 53.914 51.181 53.975 50.919 53.929 52.146 53.975 51.938 53.934 52.603 53.975 52.471 53.937 52.883 53.975 52.799 55.522 54.204 55.563 54.059 57.076

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 48.514 49.576 49.426 50.800 50.495 49.578 49.433 48.598 48.844 49.809 49.621 50.800 50.521 49.728 49.591 48.867 49.073 49.947 49.769 50.800 50.561 49.769 49.667 48.908 49.073 49.901 49.769 50.800 50.541 49.845 49.715 49.083 49.276 50.053 49.883 50.800 50.556 49.936 49.812 49.251 49.428 50.137 49.975 50.800 50.594 49.975 49.881 49.289 49.428 50.096 49.975 50.800 52.108 51.316 51.178 50.455 50.673 51.534 51.356 52.388 52.149 51.356 51.255 50.495 50.673 51.488 51.356 52.388 53.447 51.158 50.937 48.870 49.403 51.511 51.224 53.975 53.513 51.224 51.059 48.936 49.403 51.438 51.224 53.975 53.533 2.1001 51.852 51.651 50.135 50.546 52.172 51.913 53.975 53.594 51.913 51.763 50.195 50.546 52.108 51.913 53.975 53.640 52.555 52.400 51.410 51.689 52.802 52.601 53.975 53.685 52.601 52.487 51.455 51.689 52.751 52.601 53.975 53.696 52.903 52.766 52.042 52.248 53.122 52.944 53.975 53.736 52.944 52.840 52.083 52.248 53.076 52.944 53.975 53.731 53.111 52.987 52.426 52.603 53.312 53.150 53.975 53.769 53.150 53.056 52.464 52.603 53.271 53.150 53.975 55.283 54.491 54.353 53.630 53.848 54.709 54.531 55.563 55.324 54.531 54.427 53.670 53.848 54.663 54.531 55.563 56.238 53.411 53.040 50.353

　　UNRc Minor Dia

　　陈拓延2004共33页第24页

　　Nominal Size, TPI, Series Int. Ext. 21/4-41/2 UNC Int. Ext. 21/4-41/2 UNC Int. 1 Ext. 2 /4-6 UN Int. 1 Ext. 2 /4-6 UN Int. 1 Ext. 2 /4-8 UN Int. Ext. 21/4-8 UN Int. Ext. 21/4-10 UNS Int. Ext. 21/4-12 UN Int. Ext. 21/4-12 UN Int. Ext. 21/4-14 UNS Int. Ext. 21/4-16 UN Int. Ext. 21/4-16 UN Int. Ext. 21/4-18 UNS Int. Ext. 21/4-20 UN Int. Ext. 21/4-20 UN Int. Ext. 25/16-16 UNS Int. Ext. 25/16-16 UNS Int. Ext. 23/8-6 UN Int. Ext. 23/8-6 UN Int. Ext. 23/8-8 UN Int. Ext. 23/8-8 UN

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　1B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A

　　0 0.07366 0 0 0 0.06604 0 0 0 0.06096 0 0 0 0.0508 0 0.04572 0 0 0 0.04318 0 0.04064 0 0 0 0.0381 0 0.0381 0 0 0 0.04318 0 0 0 0.06858 0 0 0 0.06096 0 0

　　51.943 57.076 51.943 57.150 51.717 57.084 53.340 57.150 53.076 57.089 54.356 57.150 54.094 57.099 54.940 57.104 55.321 57.150 55.113 57.107 55.575 57.109 55.778 57.150 55.646 57.112 55.956 57.112 56.058 57.150 55.974 58.694 57.379 58.738 57.234 60.256 56.540 60.325 56.251 60.264 57.531 60.325

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 51.029 53.967 53.485 57.150 2.2141 56.518 53.411 53.165 50.353 51.029 53.805 53.485 57.150 56.591 53.485 53.299 50.427 51.029 53.726 53.485 57.150 56.622 54.333 54.110 52.045 52.578 54.689 54.399 57.150 56.688 54.399 54.232 52.111 52.578 54.615 54.399 57.150 56.708 2.2251 55.027 54.823 53.310 53.721 55.352 55.088 57.150 56.769 55.088 54.935 53.370 53.721 55.286 55.088 57.150 56.772 55.448 55.283 54.077 54.407 55.715 55.499 57.150 56.815 55.730 55.575 54.585 54.864 55.977 55.776 57.150 56.860 55.776 55.662 54.630 54.864 55.926 55.776 57.150 56.845 55.928 55.783 54.948 55.194 56.159 55.971 57.150 56.871 56.078 55.941 55.217 55.423 56.297 56.119 57.150 56.911 56.119 56.015 55.258 55.423 56.251 56.119 57.150 56.891 56.195 56.065 55.433 55.626 56.403 56.233 57.150 56.906 56.286 56.162 55.601 55.778 56.487 56.325 57.150 56.944 56.325 56.228 55.639 55.778 56.446 56.325 57.150 58.456 57.663 57.523 56.802 57.023 57.889 57.706 58.738 58.499 57.706 57.602 56.845 57.023 57.843 57.706 58.738 59.794 57.506 57.280 55.217 55.753 57.866 57.574 60.325 59.863 57.574 57.407 55.286 55.753 57.793 57.574 60.325 59.883 58.202 57.996 56.485 56.896 58.529 58.263 60.325 59.944 58.263 58.110 56.545

　　UNRc Minor Dia

　　陈拓延2004共33页第25页

　　Nominal Size, TPI, Series Int. Ext. 23/8-12 UN Int. Ext. 23/8-12 UN Int. Ext. 23/8-16 UN Int. Ext. 23/8-16 UN Int. Ext. 23/8-20 UN Int. Ext. 23/8-20 UN Int. Ext. 27/16-16 UNS Int. Ext. 27/16-16 UNS Int. Ext. 21/2-4 UNC Int.

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 1A 1B Ext. 21/2-4 UNC 2A Int. 2B Ext. 21/2-4 UNC 3A Int. 3B 1 Ext. 2 /2-6 UN 2A Int. 2B 1 Ext. 2 /2-6 UN 3A Int. 3B 1 Ext. 2 /2-8 UN 2A Int. 2B 1 Ext. 2 /2-8 UN 3A Int. 3B 1 Ext. 2 /2-10 UNS 2A Int. 2B Ext. 21/2-12 UN 2A Int. 2B Ext. 21/2-12 UN 3A Int. 3B 1 Ext. 2 /2-14 UNS 2A Int. 2B 1 Ext. 2 /2-16 UN 2A Int. 2B 1 Ext. 2 /2-16 UN 3A

　　0 0.04826 0 0 0 0.04318 0 0 0 0.0381 0 0 0 0.04318 0 0 0 0.07874 0 0.07874 0 0 0 0.06858 0 0 0 0.06096 0 0 0 0.0508 0 0.04826 0 0 0 0.04318 0 0.04318 0 0

　　57.269 60.277 58.496 60.325 58.288 60.282 58.953 60.325 58.821 60.287 59.233 60.325 59.149 61.869 60.554 61.913 60.409 63.421 57.582 63.421 57.582 63.500 57.389 63.431 59.690 63.500 59.426 63.439 60.706 63.500 60.444 63.449 61.290 63.452 61.671 63.500 61.463 63.457 61.925 63.457 62.128 63.500

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 56.896 58.463 58.263 60.325 59.987 58.903 58.745 57.757 58.039 59.157 58.951 60.325 60.035 58.951 58.834 57.805 58.039 59.103 58.951 60.325 60.043 59.251 59.111 58.390 58.598 59.477 59.294 60.325 60.086 59.294 59.190 58.433 58.598 59.431 59.294 60.325 60.081 59.461 59.332 58.776 58.953 59.667 59.500 60.325 60.119 59.500 59.403 58.814 58.953 59.627 59.500 60.325 61.631 60.838 60.698 59.977 60.198 61.064 60.881 61.913 61.674 60.881 60.777 60.020 60.198 61.018 60.881 61.913 62.514 59.296 58.903 55.860 56.617 59.888 59.375 63.500 2.4612 62.817 59.296 59.032 55.860 56.617 59.718 59.375 63.500 62.895 59.375 59.177 55.938 56.617 59.632 59.375 63.500 62.969 60.681 60.452 58.392 58.928 61.044 60.749 63.500 63.038 60.749 60.579 58.461 58.928 60.970 60.749 63.500 63.058 2.4751 61.377 61.168 59.660 60.071 61.707 61.438 63.500 63.119 61.438 61.283 59.720 60.071 61.641 61.438 63.500 63.122 61.798 61.628 60.427 60.757 62.070 61.849 63.500 63.162 62.078 61.920 60.932 61.214 62.332 62.126 63.500 63.210 62.126 62.009 60.980 61.214 62.278 62.126 63.500 63.195 62.278 62.131 61.298 61.544 62.514 62.321 63.500 63.218 62.426 62.286 61.565 61.773 62.652 62.469 63.500 63.261 62.469 62.365 61.608

　　UNRc Minor Dia

　　陈拓延2004共33页第26页

　　Nominal Size, TPI, Series Int. Ext. 21/2-18 UNS Int. Ext. 21/2-20 UN Int. Ext. 21/2-20 UN Int. 5 Ext. 2 /8-6 UN Int. 5 Ext. 2 /8-6 UN Int. Ext. 25/8-8 UN Int. Ext. 25/8-8 UN Int. Ext. 25/8-12 UN Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext.

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　3B 2A 2B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 25/8-12 UN 3A 3B 5 2 /8-16 UN 2A 2B 5 2 /8-16 UN 3A 3B 5 2 /8-20 UN 2A 2B 5 2 /8-20 UN 3A 3B 3 2 /4-4 UNC 1A 1B 3 2 /4-4 UNC 2A 2B 3 2 /4-4 UNC 3A 3B 3 2 /4-6 UN 2A 2B 23/4-6 UN 3A 3B 3 2 /4-8 UN 2A 2B 3 2 /4-8 UN 3A 3B 3 2 /4-10 UNS 2A

　　0 0.04064 0 0.0381 0 0 0 0.06858 0 0 0 0.0635 0 0 0 0.04826 0 0 0 0.04318 0 0 0 0.0381 0 0 0 0.08128 0 0.08128 0 0 0 0.06858 0 0 0 0.0635 0 0 0 0.0508

　　61.996 63.459 62.306 63.462 62.408 63.500 62.324 66.606 62.865 66.675 62.601 66.612 63.881 66.675 63.619 66.627 64.846 66.675 64.638 66.632 65.303 66.675 65.171 66.637 65.583 66.675 65.499 69.769 63.932 69.769 63.932 69.850 63.739 69.781 66.040 69.850 65.776 69.787 67.056 69.850 66.794 69.799

　　Maxa Major b Min Pitch Dia(Min) Min Pitch 61.773 62.606 62.469 63.500 63.238 62.542 62.408 61.780 61.976 62.758 62.583 63.500 63.256 62.636 62.507 61.951 62.128 62.842 62.675 63.500 63.294 62.675 62.578 61.989 62.128 62.802 62.675 63.500 66.144 63.856 63.627 61.567 62.103 64.224 63.924 66.675 66.213 63.924 63.751 61.636 62.103 64.148 63.924 66.675 66.231 64.549 64.341 62.832 63.246 64.884 64.613 66.675 66.294 64.613 64.455 62.895 63.246 64.816 64.613 66.675 66.337 65.253 65.095 64.107 64.389 65.507 65.301 66.675 66.385 65.301 65.184 64.155 64.389 65.453 65.301 66.675 66.393 65.601 65.461 64.740 64.948 65.827 65.644 66.675 66.436 65.644 65.540 64.783 64.948 65.781 65.644 66.675 66.431 65.811 65.682 65.126 65.303 66.017 65.850 66.675 66.469 65.850 65.753 65.164 65.303 65.977 65.850 66.675 68.862 65.644 65.242 62.207 62.967 66.248 65.725 69.850 69.164 2.7111 65.644 65.377 62.207 62.967 66.073 65.725 69.850 69.245 65.725 65.524 62.288 62.967 65.987 65.725 69.850 69.319 67.031 66.799 64.742 65.278 67.401 67.099 69.850 69.388 67.099 66.926 64.811 65.278 67.325 67.099 69.850 69.406 2.725 67.724 67.513 66.007 66.421 68.062 67.788 69.850 69.469 67.788 67.628 66.070 66.421 67.993 67.788 69.850 69.472 68.148 67.978 66.777

　　UNRc Minor Dia

　　陈拓延2004共33页第27页

　　Nominal Size, TPI, Series Int. Ext. 23/4-12 UN Int. Ext. 23/4-12 UN Int. Ext. 23/4-14 UNS Int. Ext. 23/4-16 UN Int. Ext. 23/4-16 UN Int. Ext. 23/4-18 UNS Int. Ext. 23/4-20 UN Int. Ext. 23/4-20 UN Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext. Int. Ext.

　　7 2 /8-6 UN

　　Maxa Major

　　Cla Allowa Max Minor ss nce

　　Min Major Min Minor

　　27/8-6 UN 27/8-8 UN 27/8-8 UN 27/8-12 UN 27/8-12 UN 27/8-16 UN 27/8-16 UN 27/8-20 UN 27/8-20 UN 3-4 UNC 3-4 UNC 3-4 UNC

　　2B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 2A 2B 3A 3B 1A 1B 2A 2B 3A

　　0 0.04826 0 0 0 0.04318 0 0.04318 0 0 0 0.04064 0 0.0381 0 0 0 0.07112 0 0 0 0.0635 0 0 0 0.04826 0 0 0 0.04318 0 0 0 0.04064 0 0 0 0.08128 0 0.08128 0 0

　　67.640 69.802 68.021 69.850 67.813 69.807 68.275 69.807 68.478 69.850 68.346 69.809 68.656 69.812 68.758 69.850 68.674 72.954 69.215 73.025 68.951 72.962 70.231 73.025 69.969 72.977 71.196 73.025 70.988 72.982 71.653 73.025 71.521 72.984 71.933 73.025 71.849 76.119 70.282 76.119 70.282 76.200

篇四：英制管螺纹对照表

　　英制螺纹对照表.

　　尺寸代号每英寸牙数螺距

　　螺纹直径大径 D、d 7.723 9.728 13.157 16.662 20.955 22.911 26.441 30.201 33.249 37.897 41.91 47.803 53.746 59.614 小径 D1、d1 6.561 8.566 11.445 14.95 18.631 20.587 24.117 27.877 30.291 34.939 38.952 44.845 50.788 56.656

　　（in) 1/16 1/8 1/4 3/8 1/2 5/8 3/4 7/8 1 1-1/8 1-1/4 1-1/2 1-3/4 2

　　n 28 28 19 19 14 14 14 14 11 11 11 11 11 11

　　p 0.907 0.907 1.337 1.337 1.814 1.814 1.814 1.814 2.309 2.309 2.309 2.309 2.309 2.309

　　2-1/4 2-1/2 2-3/4 3 3-1/2 4 5 6

　　11 11 11 11 11 11 11 11

　　2.309 2.309 2.309 2.309 2.309 2.309 2.309 2.309

　　65.71 75.184 81.534 87.884 100.33 113.03 138.43 163.83

　　62.752 72.226 78.578 84.926 97.372 110.072 135.472 160.872

　　注：1in=25.4mm

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篇四：英制管螺纹对照表

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