螺纹基本尺寸对照表

英制管螺纹基本尺寸及公差（牙形角55º）BSPP

基本直径 中径 小径 内螺纹 A级 中径公差 小径公差 中径公差 外螺纹 B级 中径公差 0 -0.214 -0.250 0 -0.250 0 -0.284 0 -0.284 0 -0.284 0 -0.360 0 -0.360 0 -0.360 0 -0.360 0 -0.434 0 -0.434 0 -0.434 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 0 -0.360 0 -0.434 0 -0.434 0 -0.434 大径公差 令狐采学 螺纹代号 G1/8″×28 G1/4″×19 G3/8″×19 G1/2″×14 G5/8″×14 G3/4″×14 G1″×11 G1.1/4″×11 G1.1/2″×11 G2″×11 G2.1/2”X11 G3”X11 大径 9.728 13.157 16.662 20.955 22.911 26.441 33.249 41.910 47.803 59.614 75.184 87.884 9.147 8.566 +0.170 +0.282 0 12.301 11.445 +0.125 15.806 14.950 19.793 18.631 21.749 20.587 25.279 24.117 31.770 30.291 40.431 38.952 46.324 44.854 58.135 56.656 73.705 72.226 86.405 84.926 +0.125 0 +0.142 0 +0.142 0 +0.142 0 +0.180 0 +0.180 0 +0.180 0 +0.180 0 +0.217 0 +0.217 0 +0.217 0 G3.1/2”X11 100.330 98.851 97.372 0 0 --0.107 0.214 --+0.445 0.125 0.250 0 0 +0.445 --0 0.125 0.250 0 0 +0.541 --0 0.142 0.284 0 0 +0.541 --0 0.142 0.284 0 0 +0.541 --0 0.142 0.284 0 0 +0.640 --0 0.180 0.360 0 0 +0.640 --0 0.180 0.360 0 0 +0.640 --0 0.180 0.360 0 0 +0.640 --0 0.180 0.360 0 0 +0.640 --0 0.217 0.434 0 0 +0.640 --0 0.217 0.434 0 0 +0.640 --0 0.217 0.434 英制锥管螺纹基本尺寸及公差（牙形角55º）BSPT

螺纹代号 基面上的直径 基准长度 有效螺纹长度 圆锥内螺令狐采学创作

令狐采学创作

纹基面轴向位移偏差（±mm） 1.1 1.7 1.7 2.3 2.3 2.9 2.9 2.9 2.9 3.5 3.5 3.5 大径 R1/8″×28 9.728 R1/4″×19 13.157 R3/8″×19 16.662 R1/2″×14 20.955 R3/4″×14 26.441 R1″×11 33.249 R1.1/4″×11 41.910 R1.1/2″×11 47.803 R2″×11 59.614 R2.1/2”X11 75.184 R3”X11 87.884 R3.1/2”X11 100.330 中径 9.147 12.301 15.806 19.793 25.279 31.770 40.431 46.324 58.135 73.705 86.405 98.851 小径 8.566 11.445 14.950 18.631 24.117 30.291 38.952 44.845 56.656 72.226 84.926 97.372 基本 4.0 6.0 6.4 8.2 9.5 10.4 12.7 12.7 15.9 17.5 20.6 22.2 最大 4.9 7.3 7.7 10.0 11.3 12.7 15.0 15.0 18.2 21.0 24.1 25.7 最小 3.1 4.7 5.1 6.4 7.7 8.1 10.4 10.4 13.6 14.0 17.1 18.7 基本 6.5 9.7 10.1 13.2 14.5 16.8 19.1 19.1 23.4 26.7 29.8 31.4 最大 7.4 11.0 11.4 15.0 16.3 19.1 21.4 21.4 25.7 30.2 33.3 34.9 最小 5.6 8.4 8.8 11.4 12.7 14.5 16.8 16.8 21.1 23.2 26.3 27.9 美制管螺纹基本尺寸及公差（牙形角60º）UN(F)

外螺纹 公差等级 螺纹代号 大径 最大 11.079 12.661/2″×20UNF 7 9/16″×18UN14.25F 2 19.013/4″×16UNF 2 22.187/8″×14UNF 4 1-26.941/16″×12UN 4 1-33.295/16″×12UN 4 41.221-5/8″×12UN 9 47.571-7/8″×12UN 9 63.452-1/2″×12UN 2 9/16″×18UNF 11/16″×16UN 13/16″×16UN 1″×14UNF 14.252 17.427 20.599 25.357 7/16″×20UNF 最小 2A 中径 最大 小径 小径 最小 9.728 11.328 12.751 17.323 20.269 24.689 31.039 38.989 45.339 61.214 12.751 15.748 18.923 23.444 最大 10.033 11.608 13.081 17.678 20.676 25.146 31.496 39.446 45.796 61.671 13.081 16.104 19.279 23.825 最小 JIC螺纹 10.8710.2510.149.568 4 4 7 12.4611.8411.7311.151 1 2 6 14.0313.3313.2212.571 5 1 3 18.7717.9817.8517.12 3 1 4 21.9221.0020.8620.023 6 9 5 26.6525.4224.4225.57 5 5 5 33.0031.7730.7731.92 5 3 5 39.8839.7040.94 38.71 5 5 46.2046.0547.29 45.06 5 3 63.1662.0760.9361.92 2 8 2 ORFS螺纹 14.0313.3313.2212.571 5 1 3 17.1816.3916.2715.538 6 4 5 20.3619.5619.4418.701 8 4 7 25.0924.1724.0323.195 8 6 5 内螺纹 公差等级 2B 中径 最小 10.287 11.875 13.371 18.019 21.046 25.613 31.963 39.901 46.251 62.126 13.371 16.431 19.606 24.221 最大 10.424 12.017 13.52 18.184 21.224 25.801 32.154 40.094 46.449 62.332 13.52 16.589 19.766 24.407 大径 11.113 12.7 14.288 19.05 22.225 26.988 33.338 41.275 47.625 63.5 14.288 17.463 20.638 25.4 令狐采学创作

令狐采学创作

1-3/16″×12UN 1-7/16″×12UN 1-11/16″×12UN 2″×12UN 30.119 36.467 42.817 50.754 29.83 36.177 42.527 50.465 28.745 35.093 41.443 49.38 28.598 34.943 41.29 27.6 33.947 40.297 27.864 34.214 40.564 28.321 34.671 41.021 28.788 35.138 41.488 28.979 35.331 41.686 30.163 36.513 42.863 49.2248.2348.5148.9749.4249.6250.8 5 5 4 1 6 7 SAE螺纹 15.8315.6114.9214.8014.1614.3514.6814.9515.85/8″×18UNF 15.11 9 8 3 3 1 1 1 8 75 1-26.9426.6825.7425.6024.9625.3725.7825.9626.924.74 1/16″×14UN 7 3 3 8 8 5 3 1 87 其它美制螺纹 14.2514.0113.2213.1012.5712.9213.2513.4114.29/16″×16UN 12.36 2 3 1 1 3 9 6 1 88 22.1821.8920.8020.6619.6619.9320.3920.8521.0322.27/8″×12UN 2 2 8 8 2 9 6 1 4 25 57.1056.8155.5754.5854.8655.3255.7755.9757.12-1/4″×12UN 55.73 4 5 5 5 4 1 6 6 5 注：UNC粗牙螺纹系列，UNF细牙螺纹系列， UNEF超细牙螺纹系列， UN不变螺距系 列布锥管螺纹基本尺寸及公差(牙形角60º)NPT

基面上的直径 螺纹代号 Z1/8″×27 Z1/4″×18 Z3/8″×18 Z1/2″×14 Z3/4″×14 Z1″×11.5 Z1.1/4″×11.5 Z1.1/2″×11.5 Z2″×11.5 大径 10.272 13.572 17.055 21.223 26.568 33.228 41.985 48.054 60.092 中径 9.519 12.443 15.926 19.772 25.117 31.461 40.218 46.287 58.325 小径 8.766 11.314 14.797 18.321 23.666 29.694 38.451 44.520 56.558 螺纹长度 管端至基面有效长度 长 7 4.572 9.5 5.080 10.5 6.096 13.5 8.028 14 8.611 17.5 10.160 18 10.688 18.5 10.688 19 11.074 公制螺纹基本尺寸及公差(牙形角60º)M

基本直径 螺纹代号 6H 中径公差 +0.150 0 +0.160 0 +0.160 0 +0.180 0 +0.180 0 +0.190 0 小径公差 +0.236 0 +0.236 0 +0.236 0 +0.265 0 +0.265 0 +0.300 0 内螺纹 公差等级 大径 中径 小径 7H 中径公差 +0.190 0 +0.200 0 +0.200 0 +0.224 0 +0.224 0 +0.236 0 小径公差 +0.300 0 +0.300 0 +0.300 0 +0.335 0 +0.335 0 +0.375 0 外螺纹 公差等级 6g 中径公差 -0.026 -0.138 -0.026 -0.144 -0.026 -0.144 -0.028 -0.160 -0.028 -0.160 -0.032 -0.172 大径公差 -0.026 -0.206 -0.026 -0.206 -0.026 -0.206 -0.028 -0.240 -0.028 -0.240 -0.032 -0.268 M10X1 M12X1 M14X1 M12X1.25 M14X1.25 M12X1.5 10 12 14 12 14 12 9.350 8.917 11.350 10.917 13.350 12.917 11.188 10.647 13.188 12.647 11.026 10.376 令狐采学创作

令狐采学创作

M14X1.5 M16X1.5 M18X1.5 M20X1.5 M22X1.5 M24X1.5 M26X1.5 M27X1.5 M30X1.5 M33X1.5 M36X1.5 M39X1.5 M42X1.5 M27X2 M30X2 M33X2 M36X2 M39X2 M42X2 M45X2 M52X2 M60X2 M64X2 M72X2 14 16 18 20 22 24 26 27 30 33 36 39 42 27 30 33 36 39 42 45 52 60 64 72 13.026 12.376 15.026 14.376 17.026 16.373 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 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 +0.190 0 +0.190 0 +0.190 0 +0.190 0 +0.190 0 +0.200 0 +0.200 0 +0.200 0 +0.200 0 +0.200 0 +0.200 0 +0.200 0 +0.200 0 +0.224 0 +0.224 0 +0.224 0 +0.224 0 +0.224 0 +0.224 0 +0.224 0 +0.236 0 +0.236 0 +0.236 0 +0.236 0 +0.300 0 +0.300 0 +0.300 0 +0.300 0 +0.300 0 +0.300 0 +0.300 0 +0.300 0 +0.300 0 +0.300 0 +0.300 0 +0.300 0 +0.300 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.236 0 +0.236 0 +0.236 0 +0.236 0 +0.236 0 +0.250 0 +0.250 0 +0.250 0 +0.250 0 +0.250 0 +0.250 0 +0.250 0 +0.250 0 +0.280 0 +0.280 0 +0.280 0 +0.280 0 +0.280 0 +0.280 0 +0.280 0 +0.300 0 +0.300 0 +0.300 0 +0.300 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.375 0 +0.475 0 +0.475 0 +0.475 0 +0.475 0 +0.475 0 +0.475 0 +0.475 0 +0.475 0 +0.475 0 +0.475 0 +0.475 0 -0.032 -0.172 -0.032 -0.172 -0.032 -0.172 -0.032 -0.172 -0.032 -0.172 -0.032 -0.182 -0.032 -0.182 -0.032 -0.182 -0.032 -0.182 -0.032 -0.182 -0.032 -0.182 -0.032 -0.182 -0.032 -0.182 -0.038 -0.208 -0.038 -0.208 -0.038 -0.208 -0.038 -0.208 -0.038 -0.208 -0.038 -0.208 -0.038 -0.208 -0.038 -0.218 -0.038 -0.218 -0.038 -0.218 -0.038 -0.218 -0.032 -0.268 -0.032 -0.268 -0.032 -0.268 -0.032 -0.268 -0.032 -0.268 -0.032 -0.268 -0.032 -0.268 -0.032 -0.268 -0.032 -0.268 -0.032 -0.268 -0.032 -0.268 -0.032 -0.268 -0.032 -0.268 -0.038 -0.318 -0.038 -0.318 -0.038 -0.318 -0.038 -0.318 -0.038 -0.318 -0.038 -0.318 -0.038 -0.318 -0.038 -0.318 -0.038 -0.318 -0.038 -0.318 -0.038 -0.318 令狐采学创作