常用螺纹尺寸与公差汇总表

公制螺纹

大径 基本直径 中径 小径 6H 中径公差 M10*1 M12*1 M14*1 10 12 14 9.35 11.35 13.35 8.917 10.917 小径公差 内螺纹公差等级 7H 中径公0,差 小径公差 6g 中径公差 小径公差 外螺纹公差 0,+0.150 0,+0.236 0,+0.190 0,+0.300 -0.026,-0.138 -0.026,0.206 0,+0.160 0,+0.236 0,+0.200 0,+0.300 -0.026,-0.144 -0.026,0.206 122.917 0,+0.160 0,+0.236 0,+0.200 0,+0.300 -0.026,-0.144 -0.026,0.206 0,+0.180 0,+0.265 0,+0.224 0,+0.335 -0.028,-0.160 -0.028,-0.240 0,+0.180 0,+0.265 0,+0.224 0,+0.335 -0.028,-0.160 -0.028,-0.240 0,+0.190 0,+0.300 0,+0.236 0,+0.375 -0.032,-0.172 -0.032,-0.268 0,+0.190 0,+0.300 0,+0.236 0,+0.375 -0.032,-0.172 -0.032,-0.268 0,+0.190 0,+0.300 0,+0.236 0,+0.375 -0.032,-0.172 -0.032,-0.268 0,+0.190 0,+0.300 0,+0.236 0,+0.375 -0.032,-0.172 -0.032,-0.268 0,+0.190 0,+0.300 0,+0.236 0,+0.375 -0.032,-0.172 -0.032,-0.268 0,+0.190 0,+0.300 0,+0.236 0,+0.375 -0.032,-0.172 -0.032,-0.268 0,+0.200 0,+0.300 0,+0.250 0,+0.375 -0.032,-0.182 -0.032,-0.268 0,+0.200 0,+0.300 0,+0.250 0,+0.375 -0.032,-0.182 -0.032,-0.268 0,+0.200 0,+0.300 0,+0.250 0,+0.375 -0.032,-0.182 -0.032,-0.268 0,+0.200 0,+0.300 0,+0.250 0,+0.375 -0.032,-0.182 -0.032,-0.268 0,+0.200 0,+0.300 0,+0.250 0,+0.375 -0.032,-0.182 -0.032,-0.268 0,+0.200 0,+0.300 0,+0.250 0,+0.375 -0.032,-0.182 -0.032,-0.268 M12*1.25 12 M14*1.25 14 M12*1.5 M14*1.5 M16*1.5 M18*1.5 M20*1.5 M22*1.5 M24*1.5 M26*1.5 M27*1.5 M30*1.5 M33*1.5 M36*1.5 12 14 16 18 20 22 14 26 27 30 33 36 11.188 10.7 13.188 12.7 11.026 10.376 13.026 12.376 15.026 14.376 17.026 16.376 19.026 18.376 21.026 20.376 23.026 22.376 25.026 24.376 26.026 25.376 29.026 28.376 32.026 31.376 35.026 34.376 . 学习参考 .

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M39*1.5 M42*1.5 M27*2 M30*2 M33*2 M36*2 M39*2 M42*2 M45*2 M52*2 M60*2 M*2 M72*2 39 42 27 30 33 36 39 42 45 52 60 72 38.026 37.376 41.026 40.376 25.701 24.835 28.701 27.835 31.701 30.835 34.701 33.835 37.701 36.835 40.701 39.835 43.701 42.835 50.701 49.835 58.701 57.835 62.701 61.835 70.701 69.835 0,+0.200 0,+0.300 0,+0.250 0,+0.375 -0.032,-0.182 -0.032,-0.268 0,+0.200 0,+0.300 0,+0.250 0,+0.375 -0.032,-0.182 -0.032,-0.268 0,+0.224 0,+0.375 0,+0.280 0,+0.475 -0.038,-0.208 -0.038,-0.318 0,+0.224 0,+0.375 0,+0.280 0,+0.475 -0.038,-0.208 -0.038,-0.318 0,+0.224 0,+0.375 0,+0.280 0,+0.475 -0.038,-0.208 -0.038,-0.318 0,+0.224 0,+0.375 0,+0.280 0,+0.475 -0.038,-0.208 -0.038,-0.318 0,+0.224 0,+0.375 0,+0.280 0,+0.475 -0.038,-0.208 -0.038,-0.318 0,+0.224 0,+0.375 0,+0.280 0,+0.475 -0.038,-0.208 -0.038,-0.318 0,+0.224 0,+0.375 0,+0.280 0,+0.475 -0.038,-0.208 -0.038,-0.318 0,+0.236 0,+0.375 0,+0.300 0,+0.475 -0.038,-0.218 -0.038,-0.318 0,+0.236 0,+0.375 0,+0.300 0,+0.475 -0.038,-0.218 -0.038,-0.318 0,+0.236 0,+0.375 0,+0.300 0,+0.475 -0.038,-0.218 -0.038,-0.318 0,+0.236 0,+0.375 0,+0.300 0,+0.475 -0.038,-0.218 -0.038,-0.318 美制NPSM螺纹（美国标准ANSI B1.20.1机械连接用直管螺纹60

度）

标号 螺纹代号 外螺纹（2A级） 大径 最大值 02 04 06 08 1/8-27NPSM 1/4-18NPSM 3/8-18NPSM 1/2-14NPSM 10.084 13.360 16.815 20.904 最小值 9.906 13.132 16.586 20.650 中径 最大值 9.462 12.454 15.0 19.733 最小值 9.370 12.342 15.776 19.604 内螺纹（2B级） 小径 最小值 9.093 11.887 15.316 18.974 最大值 9.246 12.217 15.545 19.279 中径 最小值 9.4 12.487 15.926 19.771 最大值 9.609 12.634 16.076 19.942 . 学习参考 .

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12 16 20 24 32 40 48 3/4-14NPSM 1-11.5NPSM 26.2 32.842 26.010 32.537 41.300 47.371 59.411 71.780 87.681 25.077 31.417 40.173 46.241 58.278 70.104 86.009 24.943 31.270 40.020 46.086 58.120 69.916 85.816 24.333 30.505 39.268 45.339 57.379 68.783 84.684 24.638 30.759 39.497 45.568 57.607 69.266 85.166 25.118 31.460 40.218 46.286 58.326 70.160 86.068 25.293 31.653 40.416 46.487 58.532 70.409 86.319 1.1/4-11.5NPSM 41.605 1.1/2-11.5NPSM 47.676 2-11.5NPSM 2.1/2-8NPSM 3-8NPSM 59.715 72.161 88.062 NPT布锥管螺纹

标号 螺纹代号 大径 02 04 06 08 12 16 20 24 32 40 48 Z1/8*27 Z1/4*18 Z3/8*18 Z1/2*14 Z3/4*14 Z1*11.5 Z1.1/4*1.5 Z1.1/2*11.5 Z2*11.5 Z2.1/2*8 Z3*8 10.242 13.616 17.055 21.223 26.568 33.228 41.985 48.054 60.092 72.699 88.608 基面上的直径 中径 9.4 12.487 15.926 19.772 25.117 31.461 40.218 46.287 58.325 70.159 86.068 小径 8.736 11.385 14.797 18.321 23.666 29.694 38.451 44.520 56.558 67.619 83.528 螺纹长度 管端至基面长 4.102 5.786 6.096 8.128 8.611 10.160 10.668 10.668 11.074 17.323 19.456 有效长度 6.703 10.206 10.358 13.556 13.861 17.343 17.953 18.377 19.215 28.2 30.480 9.986 13.254 16.674 20.715 26.030 32.593 41.318 47.387 59.400 71.616 87.392 端面大径 55度英锥管螺纹

. 学习参考 .

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标号 螺纹代号 大径 基本直径 中径 小径 内螺纹 中径公差 小径公差 A 中径公差 外螺纹 公差等级 B 大径公差 0，-0.214 中径公差 0，-0.214 0，-0.250 0，-0.250 0，-0.284 0，-0.284 0，-0.284 0，-0.360 0，-0.360 0，-0.360 大径公差 0，-0.214 0，-0.250 0，-0.250 0，-0.284 0，-0.284 0，-0.284 0，-0.360 0，-0.360 0，-0.360 02 G1/8*28 9.728 9.147 8.566 0.170，0 0.282，0 0，-0.170 04 G1/4*19 13.157 12.301 11.445 0.125，0 0.445，0 0.-0.125 0，-0.250 06 G3/8*19 16.662 15.806 14.950 0.125，0 0.445，0 0，-0.125 0，-0.250 08 G1/2*14 20.955 19.793 18.631 0.142，0 0.541，0 0，-0.142 0，-0.284 10 G5/8*14 22.911 21.749 20.587 0.142，0 0.541，0 0，-0.142 0，-0.284 12 G3/4*14 26.441 25.279 24.117 0.142，0 0.541，0 0，-0.142 0，-0.284 16 G1*11 33.249 31.770 30.291 0.180，0 0.0，0 0，-0.180 0，-0.360 20 G1.1/4*11 41.910 40.431 38.952 0.180，0 0.0，0 0，-0.180 0，-0.360 24 G1.1/2*11 47.803 46.324 44.845 0.180，0 0.0，0 0，-0.180 0，-0.360 . 学习参考 .

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32 G2*11 59.614 58.135 56.656 0.180，0 0.0，0 0，-0.180 0，-0.360 0，-0.360 0，-0.434 0，-0.434 0，-0.360 0，-0.434 0，-0.434 40 G2.1/2*11 75.184 73.705 72.226 0.217，0 0.0，0 0，-0.217 0，-0.434 48 G3*11 87.884 86.405 84.926 0.217，0 0.0，0 0，-0.217 0，-0.434 55度英锥管螺纹

标号 螺纹代号 基面上的直径 大径 中径 小径 基本 基准长度 最大 有效螺纹长度 圆锥内螺纹端面大径 最小 基本 最大 最小 基面轴向位移的极限偏差 02 04 06 08 12 16 20 24 32 40 48 R1/8*28 R1/4*19 R3/8*19 R1/2*14 R3/4*14 R1*11 9.728 9.147 8.566 4 6 6.4 8.2 9.5 10.4 12.7 12.7 15.9 17.5 20.6 4.9 7.3 7.7 10 11.3 12.7 15 15 18.2 21 24.1 3.1 4.7 5.1 6.4 7.7 8.1 10.4 10.4 13.6 14 17.1 6.5 9.7 7.4 11 5.6 8.4 8.8 11.4 1.1 1.7 1.7 2.3 2.3 2.9 2.9 2.9 2.9 3.5 3.5 9.478 12.782 16.262 20.443 25.847 32.599 41.116 47.009 58.620 74.090 86.597 13.157 12.301 11.445 16.662 15.806 14.950 20.955 19.793 18.631 26.441 25.279 24.117 33.249 31.770 30.291 10.1 11.4 13.2 15 14.5 16.3 12.7 16.8 19.1 14.5 19.1 21.4 16.8 19.1 21.4 16.8 23.4 25.7 21.1 26.7 30.2 23.2 29.8 33.3 26.3 R1.1/4*11 41.910 40.431 38.952 R1.1/2*11 47.803 46.324 44.845 R2*11 59.614 58.135 56.656 R2.1/2*11 75.184 73.705 72.226 R3*11 87.884 86.405 84.926 . 学习参考 .

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美制螺纹

标号 螺纹代号 外螺纹 公差等级2A 大径 最大 最小 中径 最大 最小 JIC螺纹 02 03 04 05 06 08 10 12 5/16×24UNF 3/8*24UNF 7/16*20UNF 1/2*20UNF 9/16*18UNF 3/4*16UNF 7/8*14UNF 7.910 9.497 7.727 9.314 7.221 8.809 7.127 8.712 6.650 8.237 9.568 6.782 8.382 9.728 7.036 8.636 7.249 8.837 7.371 8.961 7.938 9.525 小径 最大 小径 最小 最大 内螺纹 公差等级2B 中径 最小 最大 大径 最小 11.079 10.874 10.254 10.147 10.033 10.287 10.424 11.113 11.608 11.875 12.017 13.081 13.371 13.52 12.7 14.288 19.05 12.667 12.461 11.841 11.732 11.156 11.328 14.252 14.031 13.335 13.221 12.573 12.751 19.012 18.773 17.981 17.854 17.12 17.323 17.678 18.019 18.184 22.184 21.923 21.006 20.869 20.025 20.269 25.57 25.425 24.425 24.6 20.676 21.046 21.224 22.225 25.146 25.613 25.801 26.988 1.1/16*12UNF 26.944 26.655 16 20 24 32 40 1.5/16*12UNF 33.294 33.005 1.5/8*12UNF 1.7/8*12UNF 2.1/2*12UNF 3812UNF 41.229 47.579 40.94 47.29 31.92 31.773 30.775 31.039 38.71 45.06 38.9 45.339 31.496 31.963 32.154 33.338 39.446 39.901 40.094 41.275 45.796 46.251 46.449 47.625 61.671 62.126 62.332 74.371 74.826 75.034 63.5 76.2 39.855 39.705 46.205 46.053 61.92 63.452 63.162 62.078 60.932 61.214 76.157 75.862 74.778 74.618 73.632 73.914 38.052 37.724 36.401 36.238 35.029 35.357 ORFS螺纹 18HK 1.1/2*10UNF 35.0 36.449 36.660 38.100 . 学习参考 .

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04 06 08 10 12 16 20 24 9/16*18UNF 14.252 14.031 13.335 13.221 12.573 12.751 13.081 13.371 13.52 14.288 11/16*16UNF 17.427 17.188 16.396 16.274 15.535 15.748 13/16*16UNF 20.599 20.361 19.568 19.444 18.707 18.923 1*14UNSF 1.3/16*12UN 1.7/16*12UN 25.357 25.095 24.178 24.036 23.195 23.444 30.119 29.83 28.754 28.598 27.6 27.8 16.104 16.431 16.5 17.463 19.279 19.606 19.766 20.638 23.825 24.221 24.407 25.4 28.321 28.788 28.979 30.163 34.671 35.138 35.331 36.513 41.021 41.488 41.686 42.863 48.971 49.426 49.627 50.8 36.467 36.177 35.093 34.943 33.947 34.214 41.29 49.25 40.297 40.5 48.235 48.514 1.11/16*12UN 42.817 42.527 41.443 2*12UN 50.754 50.465 49.38 SAE螺纹 06 12 5/8×18UNF 15.839 15.618 14.923 14.803 14.161 14.351 25.743 其他美制螺纹 9/16*16UN 7/8*12UN 2.1/4*12UN 14.252 14.013 13.221 13.101 12.36 12.573 12.929 13.256 13.411 14.288 20.396 20.851 21.034 22.225 55.321 55.776 55.976 57.15 25.608 24.74 24.968 14.681 14.958 15.11 15.875 1.1/16*14UNF 26.947 26.683 25.375 25.783 25.961 26.987 22.182 21.2 20.808 20.668 19.662 19.939 57.104 56.815 55.73 55.575 54.585 54.8 可拆式芯子与套筒连接螺纹

软管编号 大径 最大 R5-04 9/32*32 7.120 最小 6.967 螺纹代号 外螺纹 中径 最大 6.604 最小 6.523 6.175 小径 小径 最小 6.294 最大 6.472 内螺纹 公差等级2B 中径 最小 6.629 最大 6.736 7.145 大径 . 学习参考 .

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R5-05 46/127*28 9.197 9.032 10.520 14.074 17.249 20.399 26.731 33.078 39.428 50.541 10.874 14.031 15.618 18.793 21.968 29.870 39.428 8.608 10.095 13.569 16.744 19.779 26.035 32.382 38.732 49.845 10.254 13.335 14.923 18.098 21.273 29.093 38.732 8.516 10.004 13.470 16.2 19.667 25.916 32.258 38.605 49.715 10.147 13.221 14.803 17.981 21.156 28.9 38.605 8.115 9.603 12.997 16.172 19.347 25.273 31.620 37.970 49.083 9.568 12.573 14.161 17.336 20.511 28.232 37.970 8.234 9.735 13.132 16.307 19.253 25.451 31.801 38.151 49.276 9.728 12.751 14.351 17.526 20.701 28.448 38.151 8.463 9.938 13.386 16.561 19.558 25.781 32.131 38.481 49.606 10.033 13.081 14.681 17.856 21.031 28.804 38.481 8.636 10.123 13.599 16.774 19.812 26.071 32.421 38.771 49.883 10.287 13.371 14.958 18.133 21.308 29.131 38.771 8.753 10.240 13.729 16.906 19.982 26.228 32.581 38.936 50.053 10.424 13.520 15.110 18.285 21.460 29.299 38.936 9.225 10.713 14.288 17.463 20.638 26.988 33.338 39.688 50.800 11.113 14.288 15.875 19.050 22.225 30.163 39.688 R5-06 107/254*28 10.685 R5-08 R5-10 R5-12 R5-16 R5-20 R5-24 R5-32 2A-04 2A-06 2A-08 2A-10 2A-12 2A-16 2A-20 9/16*24 11/16*24 13/16*20 1.1/16*18 1.5/16*18 1.9/16*18 2*18 7/16*20 9/16*18 5/8*18 3/4*18 7/8*18 1.3/16*16 1.9/16*18 14.257 17.432 20.599 26.952 33.299 39.9 50.762 11.079 14.252 15.839 19.014 22.1 30.124 39.9 新西兰B09内螺纹

标号 你螺纹代号 大径MIN 中径MIN 中径MAX 小径MIN 小径MAX B-09 0.860in*14 21.844 20.683 20.841 19.522

NPTF+密封管螺纹

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标号 螺纹代号 外螺纹小端中径 外螺纹大端中径 9.652 外螺纹小端大外螺纹小端大外螺纹全牙长度 6.703 内螺纹大端中径 9.4 内螺纹小端中径 9.058 内螺纹大端小内螺纹大端小内螺纹全牙长度 6.924 径最小 径最大 9.871 9.960 径最小 径最大 8.763 8.851 2 4 6 8 12 16 20 24 32 40 48 1/8-27NPTF 1/4-18NPTF 3/8-18NPTF 1/2-14NPTF 3/4-14NPTF 1-11.5NPTF 9.233 12.126 12.7 13.128 13.215 10.206 12.487 11.862 11.398 11.486 10.020 15.545 16.193 16.547 16.634 10.358 15.926 15.281 14.837 14.924 10.330 19.2 20.111 20.616 20.703 13.556 19.772 18.926 18.333 18.420 13.571 24.579 25.445 25.931 26.018 13.861 25.117 24.239 23.678 23.768 14.054 30.826 31.910 32.474 32.562 17.343 31.461 30.411 29.725 29.813 16.787 1.1/4-11.5NPTF 39.551 40.673 41.199 41.287 17.953 40.218 39.136 38.482 38.570 17.295 1.1/2-11.5NPTF 45.621 46.769 47.269 47.357 18.377 46.287 45.207 44.551 44.0 17.295 2-11.5NPTF 2.1/2-8NPTF 3-8NPTF 57.633 58.834 59.281 59.369 19.215 58.325 57.219 56.5 56.677 17.701 69.076 70.882 71.476 71.559 28.3 70.159 68.481 67.676 67.759 26.848 84.852 86.757 87.252 87.335 30.480 86.068 84.257 83.585 83.668 28.981 备注：1.表中外螺纹的完整螺纹长度包括不超过一个螺距长度的倒角

2.表中内螺纹的完整螺纹长度不包括在中径线和倒角交线外的锥口孔。即完整螺纹长度的等于完整内螺纹加一个螺距。

. 学习参考 .