螺纹中径公差表 - 360文档中心

英制螺纹尺寸公差表

英制螺纹尺寸公差表单位：毫米规格代号系列代号等级螺距外螺纹内螺纹名义直径每英寸牙数外径中径内径小径中径大径1 0.060—80 （0#—80）UNF2 0.3175 1.5113 –0.08128 1.30556 –0.04572 1.12268 1.1811+0.12446 1.3182 +0.05842 1.5243 0.3175 1.5240 –0.08128 1.3182 –0.03302 1.13538 1.1811 +0.12446 1.3182 +0.04318 1.5242 0.073—64 （1#—64）UNC 2 0.396875 1.83896 –0.09652 1.58242 –0.0508 1.35128 1.42494+0.15748 1.59766 +0.06604 1.8542 3 0.396875 1.8542 –0.09652 1.59766 –0.0381 1.36652 1.42494+0.15748 1.59766 +0.04826 1.85423 0.073—72 （1#—72）UNF 2 0.352777 1.83896 –0.0889 1.61036 –0.04826 1.40716 1.4732 +0.1397 1.6256 +0.0635 1.85423 0.352777 1.8542 –0.0889 1.6256 –0.03556 1.4224 1.4732 +0.1397 1.6256 +0.04826 1.85424 0.086—56 （2#—56）UNC 2 0.453571 2.16916 –0.10414 1.87452 –0.05334 1.6129 1.69418 +0.1778 1.88976 +0.07112 2.18443 0.453571 2.1844 –0.10414 1.88976 –0.04064 1.62814 1.69418 +0.1778 1.88976 +0.05334 2.18445 0.086—64 （2#—64）UNF 2 0.396875 2.16916 –0.09652 1.91262 –0.0508 1.68148 1.75514 +0.15748 1.92786 +0.06858 2.18443 0.396875 2.1844 –0.09652 1.92786 –0.0381 1.69672 1.75514 +0.15748 1.92786 +0.0508 2.18446 0.099—48 （3#—48）UNC 2 0.529166 2.49682 –0.1143 2.15392 –0.05842 1.84658 1.94056 +0.20574 2.1717 +0.07620 2.51463 0.529166 2.5146 –0.1143 2.1717 –0.04318 1.86436 1.94056 +0.20574 2.1717 +0.05588 2.51467 0.099—56 （3#—56）UNF 2 0.453571 2.49682 –0.10414 2.20218 –0.05588 1.94056 2.02438 +0.17272 2.21996 +0.07112 2.51463 0.453571 2.5146 –0.10414 2.21996 –0.04064 1.95834 2.02438 +0.17272 2.21996 +0.05334 2.51468 0.112—40 （4#—40）UNC 2 0.635 2.82448 –0.12954 2.413 –0.0635 2.0447 2.15646 +0.2286 2.43332 +0.08382 2.84483 0.635 2.8448 –0.12954 2.43332 –0.04826 2.06502 2.15646 +0.2286 2.43332 +0.06096 2.84489 0.112—48 （4#—48）UNF 2 0.529166 2.82702 –0.1143 2.48412 –0.06096 2.17678 2.27076 +0.18796 2.5019 +0.07874 2.84483 0.529166 2.8448 –0.1143 2.5019 –0.04572 2.19456 2.27076 +0.18796 2.5019 +0.05842 2.844810 0.125—40 （5#—40）UNC 2 0.635 3.15468 –0.12954 2.7432 –0.06604 2.3749 2.48666 +0.21082 2.76352 +0.08382 3.1753 0.635 3.175 –0.12954 2.76352 –0.04826 2.39522 2.48666 +0.21082 2.76352 +0.0635 3.17511 0.125—44 （5#—44）UNF 2 0.577273 3.15722 –0.12192 2.7813 –0.0635 2.44856 2.55016 +0.1905 2.79908 +0.08128 3.1753 0.577273 3.175 –0.12192 2.79908 –0.04826 2.46634 2.55016 +0.1905 2.79908 +0.06096 3.17512 0.138—32 （6#—32）UNC 2 0.79375 3.48488 –0.1524 2.96926 –0.07112 2.51206 2.6416+0.254 2.98958 +0.09398 3.50523 0.79375 3.5052 –0.1524 2.98958 –0.05334 2.53238 2.6416+0.254 2.98958 +0.06858 3.505213 0.138—40 （6#—40）UNF 2 0.635 3.48488 –0.12954 3.0734 –0.06604 2.7051 2.8194+0.2032 3.09372 +0.08636 3.50523 0.635 3.5052 –0.12954 3.09372 –0.0508 2.72542 2.8194 +0.19304 3.09372 +0.0635 3.5052序号规格代号系列代号等级螺距外螺纹内螺纹名义直径每英寸牙数外径中径内径小径中径大径 14 0.164—32 （8#—32）UNC 2 0.79375 4.14274 –0.1524 3.62712 –0.07366 3.16992 3.302 +0.2286 3.64998 +0.09652 4.1656 3 0.79375 4.1656 –0.1524 3.64998 –0.05588 3.19278 3.302 +0.22606 3.64998 +0.07112 4.1656 15 0.164—36 （8#—36）UNF 2 0.70555 4.14528 –0.1397 3.68808 –0.07112 3.27914 3.4036 +0.2032 3.7084 +0.09144 4.1656 3 0.70555 4.1656 –0.1397 3.7084 –0.05334 3.29946 3.4036 +0.19304 3.7084 +0.06858 4.1656 16 0.190—24 （10#—24）UNC 2 1.05833 4.8006 –0.18288 4.11226 –0.08382 3.50266 3.683 +0.2794 4.13766 +0.10922 4.826 3 1.05833 4.826 –0.18288 4.13766 –0.0635 3.52806 3.683 +0.2667 4.13766 +0.08128 4.826 17 0.190—32（10#—32）UNF 2 0.79375 4.80314 –0.1524 4.28752 –0.0762 3.83032 3.9624 +0.20324.31038 +0.09906 4.826 3 0.79375 4.826 –0.1524 4.31038 –0.05842 3.85318 3.9624 +0.205744.31038 +0.07366 4.826 18 0.216—24 UNC 2 1.058335.461 –0.18288 4.77266 –0.08636 4.16306 4.3434 +0.2544.79806 +0.111765.4864 3 1.05833 5.4864 –0.18288 4.79806 –0.06604 4.18846 4.3434 +0.246384.79806 +0.83825.4864 19 0.216—28 UNF 2 0.90714 5.461 –0.1651 4.87172 –0.08128 4.34848 4.4958 +0.22864.89712 +0.106685.4864 3 0.90714 5.4864 –0.1651 4.89712 –0.06096 4.37388 4.4958 +0.220984.89712 +0.078745.4864 20 0.216—32 UNEF 2 0.79375 5.46354 –0.1524 4.94792 –0.07874 4.49072 4.6228 +0.20324.97078 +0.104145.4864 3 0.79375 5.4864 –0.1524 4.97078 –0.06096 4.51358 4.6228 +0.19054.97078 +0.078745.4864 21 0.250—20 1/4—20 UNC 1 1.276.32206 –0.30988 5.49656 –0.14224 4.76504 4.9784 +0.27945.5245 +0.185426.35 2 1.27 6.32206 –0.20574 5.49656 –0.09398 4.76504 4.9784 +0.27945.5245 +0.124466.35 3 1.27 6.35 –0.20574 5.5245 –0.07112 4.79298 4.9784 +0.271785.5245 +0.091446.35 22 0.250—28 1/4—28UNF 1 0.90714 6.3246 –0.24892 5.73532 –0.127 5.21208 5.3594 +0.22865.76072 +0.16516.35 2 0.90714 6.3246 –0.1651 5.73532 –0.08382 5.21208 5.3594 +0.22865.76072 +0.109226.35 3 0.90714 6.35 –0.1651 5.76072 –0.0635 5.23748 5.3594 +0.20325.76072 +0.081286.35 23 0.250—32 1/4—32UNEF 2 0.79375 6.3246 –0.1524 5.80898 –0.8128 5.35178 5.4864 +0.20325.83438 +0.106686.35 3 0.79375 6.35 –0.1524 5.83438 –0.6096 5.37718 5.4864 +0.175265.83438 +0.078746.35 24 .3125－18 5/16－18UNC 1 1.411117.90702 –0.33274 6.99008 –0.15494 6.17474 6.4008 +0.33027.02056 +0.200667.9375 2 1.411117.90702 –0.22098 6.99008 –0.1016 6.17474 6.4008 +0.33027.02056 +0.134627.9375 3 1.411117.9375 –0.220987.02056 –0.0762 6.20522 6.4008 +0.27947.02056 +0.099067.9375序号规格代号系列代号等级螺距外螺纹内螺纹名义直径每英寸牙数外径中径内径小径中径大径 25 .3125—20 5/16—20UN 21.27 7.90702 –0.205747.08152 –0.1016 6.35 6.5532 +0.30487.112 +0.132087.9375 31.27 7.9375 –0.205747.112 –0.0762 6.38048 6.5532 +0.2547.112 +0.099067.9375 26 .3125—24 5/16—24UNF 11.0583337.90956 –0.274327.22122 –0.1397 6.61162 6.7818 +0.2547.24916 +0.180347.9375 21.0583337.90956 –0.182887.22122 –0.09398 6.61162 6.7818 +0.2547.24916 +0.121927.9375 31.0583337.9375 –0.182887.24916 –0.6858 6.63956 6.7818 +0.21336 7.24916 +0.091447.9375 27 .3125—28 5/16—28UN 20.90714 7.9121 –0.16517.32282 –0.8636 6.79958 6.9596 +0.20327.34822 +0.111767.9375 30.90714 7.9375 –0.16517.34822 –0.06604 6.82498 6.9596 +0.17018 7.34822 +0.083827.9375 28 .3125—32 5/16—32UNEF 20.79375 7.9121 –0.15247.39648 –0.08128 6.93928 7.0866 +0.17787.42188 +0.106687.9375 30.79375 7.9375 –0.15247.42188 –0.06096 6.96468 7.0866 +0.14478 7.42188 +0.78747.9375 29 0.375—16 3/8—16 UNC 11.5875 9.49198 –0.360688.46074 –0.1651 7.5438 7.7978 +0.35568.49376 +0.21599.525 21.5875 9.49198 –0.238768.46074 –0.11176 7.5438 7.7978 +0.35568.49376 +0.144789.525 31.5875 9.525 –0.238768.49376 –0.08382 7.57682 7.7978 +0.28448 8.49376 +0.109229.525 30 0.375—20 3/8—20UN 21.27 9.49452 –0.205748.66902 –0.10414 7.9375 8.1534 +0.27948.6995 +0.137169.525 31.27 9.525 –0.205748.6995 –0.07874 7.96798 8.1534 +0.22098 8.6995 +0.10169.525 31 0.375—24 3/8—24UNF 11.0583339.49706 –0.274328.80872 –0.14478 8.19912 8.382 +0.2548.83666 +0.18796 9.525 21.0583339.49706 –0.182888.80872 –0.09652 8.19912 8.382 +0.2548.83666 +0.12466 9.525 31.0583339.525 –0.182888.83666 –0.07366 8.22706 8.382 +0.182888.83666 +0.09398 9.525 32 0.375—28 3/8—28UN 20.90714 9.49706 –0.16518.90778 –0.09144 8.38454 8.5344 +0.22868.93572 +0.116849.525 30.90714 9.525 –0.16518.93572 –0.06858 8.41248 8.5344 +0.16764 8.93572 +0.08899.525 33 0.375—32 3/8—32UNEF 20.79375 9.4996 –0.15248.98398 –0.08636 8.52678 8.6614 +0.20329.00938 +0.111769.525 30.79375 9.525 –0.15249.00938 –0.0635 8.55218 8.6614 +0.14986 9.00938 +0.083829.525 34 0.4375—14 UNC 11.81428611.07694 –0.39379.89838 –0.18034 8.8519 9.144 +0.40649.93394 +0.2336811.1125 2 1.81428611.07694 –0.261629.89838 –0.11938 8.8519 9.144 +0.40649.93394 +0.1549411.1125 3 1.81428611.1125 –0.261629.93394 –0.0889 8.88746 9.144 +0.297189.93394 +0.1168411.1125 35 0.4375—16 UN 2 1.5875 11.07694 –0.2387610.0457 –0.11684 9.12876 9.398 +0.355610.08126 +0.1498611.1125 3 1.5875 11.1125 –0.2387610.08126 –0.08636 9.16432 9.398 +0.25410.08126 +0.114311.1125号代号级名义直径每英寸牙数外径中径内径小径中径大径 36 0.4375—20 UNF 11.27 11.07948 –0.3098810.25398 –0.160029.52246 9.7282 +0.304810.287 +0.2057411.1125 2 1.27 11.07948 –0.2057410.25398 –0.106689.52246 9.7282 +0.304810.287 +0.1371611.1125 3 1.27 11.1125 –0.2057410.287 –0.078749.55548 9.7282 +0.21844 10.287 +0.1041411.1125 37 0.4375—28 UNEF 2 0.90714311.08456 –0.165110.49528 –0.091449.97204 10.1346 +0.203210.52322 +0.1168411.1125 3 0.90714311.1125 –0.165110.52322 –0.068589.99998 10.1346 +0.154910.52322 +0.0889 11.1125 38 0.4375—32 UN 2 0.79375 11.0871 –0.152410.57148 –0.0863610.11248 10.2616 +0.177810.59688 +0.1117611.1125 3 0.79375 11.1125 –0.152410.59688 –0.0635 10.1396810.2616 +0.137210.59688 +0.0838211.1125 39 0.500—13 UNC 1 1.95384612.6619 –0.4140211.3919 –0.1879610.2641410.5918 +0.431811.43 +0.2463812.7 2 1.95384612.6619 –0.2768611.3919 –0.12710.2641410.5918 +0.431811.43 +0.165112.7 3 1.95384612.700 –0.2768611.43 –0.0939810.3022410.5918 +0.289611.43 +0.1219212.7 40 0.500—16 UN 2 1.5875 12.66444 –0.2387611.6332 –0.1193810.7162610.9728 +0.355611.66876 +0.1549412.7 3 1.5875 12.700 –0.2387611.66876 –0.088910.7518210.9728 +0.251511.66876 +0.1168412.7 41 0.500—20 UNF 1 1.27 12.66698 –0.3098811.84148 –0.1625611.10996 11.3284 +0.431811.8745 +0.2133612.7 2 1.27 12.66698 –0.2057411.84148 –0.1092211.10996 11.3284 +0.431811.8745 +0.1422412.7 3 1.27 12.700 –0.2057411.8745 –0.0812811.14298 11.3284 +0.195611.8745 +0.1066812.7 42 0.500—28 UNEF 2 0.90714312.67206 –0.165112.08278 –0.0939811.55954 11.7094 +0.228612.11072 +0.1219212.7 3 0.90714312.700 –0.165112.11072 –0.0711211.58748 11.7094 +0.167612.11072 +0.0914412.7 43 0.500—32 UN 2 0.79375 12.6746 –0.152412.15898 –0.0889 11.70178 11.8364 +0.203212.18438 +0.114312.7 3 0.79375 12.700 –0.152412.18438 –0.0660411.72718 11.8364 +0.149812.18438 +0.0863612.7 44 0.5625—12 UNC 1 2.11666714.24686 –0.4368812.87272 –0.1981211.65098 11.9888 +0.457212.91336 +0.2590814.2875 2 2.11666714.24686 –0.2895612.87272 –0.1320811.65098 11.9888 +0.457212.91336 +0.1727214.2875 3 2.11666714.2875 –0.2895612.91336 –0.0990611.70178 11.9888 +0.312412.91336 +0.1295414.2875 45 0.5625—16 UN 2 1.5875 14.25194 –0.2387613.2207 –0.1193812.3037612.573 +0.355613.25626 +0.1549414.2875 3 1.5875 14.2875 –0.2387613.25626 –0.0889 12.3393212.573 +0.228613.25626 +0.1168414.2875号代号级名义直径每英寸牙数外径中径内径小径中径大径 46 0.5625—18 UNF 11.41111 14.25194 –0.3327413.335 –0.17272 12.5196612.7508 +0.330213.37056 +0.2260614.2875 2 1.41111 14.25194 –0.2209813.335 –0.1143 12.5196612.7508 +0.330213.37056 +0.1498614.2875 3 1.41111 14.2875 –0.2209813.37056 –0.8636 12.5552212.7508 +0.218413.37056 +0.1117614.2875 47 0.5625—20 UN 2 1.27 14.25448 –0.2057413.42898 –0.10668 12.6974612.9032 +0.304813.462 +0.139714.2875 3 1.27 14.2875 –0.2057413.462 –0.08128 12.7304812.9032 +0.208313.462 +0.1041414.2875 48 0.5625—24 UNEF 2 1.05833 14.25702 –0.1828813.56868 –0.09906 12.9590813.1318 +0.25413.59916 +0.1295414.2875 3 1.05833 1402875 –0.1828813.59916 –0.07366 12.9895613.1318 +0.187913.59916 +0.0965214.2875 49 0.5625—28 UN 2 0.90714 14.25956 –0.165113.67028 –0.09398 13.1470413.3096 +0.203213.69822 +0.1168414.2875 3 0.90714 14.2875 –0.165113.69822 –0.07112 13.1749813.3096 +0.154913.69822 +0.0914414.2875 50 0.5625—32 UN 2 0.79375 14.2621 –0.152413.74648 –0.0889 13.2892813.4366 +0.177813.77188 +0.114314.2875 3 0.79375 14.2875 –0.152413.77188 –0.06604 13.3146813.4366 +0.137213.77188 +0.0863614.2875 51 0.625—11 UNC 1 2.30909 15.83436 –0.4622814.33576 –0.21082 13.0022613.3858 +0.482614.3764 +0.2717815.875 2 2.30909 15.83436 –0.3073414.33576 –0.1397 13.0022613.3858 +0.482614.3764 +0.1828815.875 3 2.30909 15.875 –0.3073414.3764 –0.10414 13.0429 13.3858 +0.307314.3764 +0.1371615.875 52 0.625—12 UN 2 2.11666715.83436 –0.2895614.46022 –0.13716 12.9844813.589 +0.457214.50086 +0.1803415.875 3 2.11666715.875 –0.2895614.50086 –0.10414 13.2791213.589 +0.2870214.50086 +0.1346215.875 53 0.625—16 UN 2 1.5875 15.83944 –0.2387614.8082 –0.12192 13.8912614.1478 +0.355614.84376 +0.1574815.875 3 1.5875 15.875 –0.2387614.84376 –0.09144 13.9268214.1478 +0.233714.84376 +0.1168415.875 54 0.625—18 UNF 1 1.41111115.83944 –0.3327414.9225 –0.1778 14.1071614.351 +0.330214.95806 +0.2311415.875 2 1.41111115.83944 –0.2209814.9225 –0.11938 14.1071614.351 +0.330214.95806 +0.152415.875 3 1.41111115.875 –0.2209814.95806 –0.0889 14.1427214.351 +0.203214.95806 +0.114315.875 55 0.625—20 UN 2 1.27 15.84198 –0.2057415.01648 –0.10922 14.2849614.5034 +0.279415.0495 +0.1422415.875 3 1.27 15.875 –0.2057415.0495 –0.08128 14.3179814.5034 +0.195615.0495 +0.1066815.875 56 0.625—24 UNEF 2 1.05833 15.84452 –0.1828815.15618 –0.1016 14.5465814.732 +0.25415.18666 +0.1320815.875 3 1.05833 15.875 –0.1828815.18666 –0.0762 14.5770614.732 +0.1752615.18666 +0.0990615.875序号规格代号系列代号等级螺距外螺纹内螺纹名义直径每英寸牙数外径中径内径小径中径大径 57 0.625—28 UN 2 0.90714315.84706 –0.165115.25778 –0.09652 14.7345414.8844 +0.228615.28572 +0.1244615.875 3 0.90714315.875 –0.165115.28572 –0.0711214.7624814.8844 +0.167615.28572 +0.0939815.875 58 0.625—32 UN 2 0.79375 15.84706 –0.152415.33144 –0.0914414.8742415.0114 +0.203215.35938 +0.1168415.875 3 0.79375 15.875 –0.152415.35938 –0.0685814.9021815.0114 +0.149915.35938 +0.088915.875 59 0.6875—12 UN 2 2.11667 17.42186 –0.2895616.04772 –0.1371614.8259815.1638 +0.457216.08836 +0.1803417.4625 3 2.11667 17.4625 –0.2895616.08836 –0.1041414.8666215.1638 +0.292116.08836 +0.1346217.4625 60 0.6875—16 UN 2 1.5875 17.42694 –0.2387616.3957 –0.12192 15.4787615.748 +0.355616.43126 +0.1574817.4625 3 1.5875 17.4625 –0.2387616.43126 –0.0914415.5143215.748 +0.21336 16.43126 +0.1168417.4625 61 0.6875—20 UN 2 1.27 17.42948 –0.2057416.60398 –0.1092 15.8724616.0782 +0.304816.637 +0.1422417.4625 3 1.27 17.4625 –0.2057416.637 –0.08128 15.9054816.0782 +0.208316.637 +0.1066817.4625 62 0.6875—24 UNEF 2 1.05833317.43202 –0.1828816.74368 –0.1016 16.1340816.3068 +0.25416.77416 +0.1320817.4625 3 1.05833317.4625 –0.1828816.77416 –0.0762 16.1645616.3068 +0.188016.77416 +0.0990617.4625 63 0.6875—28 UN 2 0.90714317.43456 –0.165116.84528 –0.09652 16.3220416.4846 +0.203216.87322 +0.1246617.4625 3 0.90714317.4625 –0.165116.87322 –0.07112 16.3499816.4846 +0.154916.87322 +0.0939817.4625 64 0.6875—32 UN 2 0.79375 17.43456 –0.152416.91894 –0.09144 16.4617416.6116 +0.177816.94688 +0.1168417.4625 3 0.79375 17.4625 –0.152416.94688 –0.06858 16.4896816.6116 +0.137216.94688 +0.088917.4625 65 0.750—10 UNC 1 2.54 19.00428 –0.4927617.35328 –0.22352 15.8877 16.3068 +0.533417.399 +0.292119.05 2 2.54 19.00428 –0.3276617.35328 –0.14986 15.8877 16.3068 +0.533417.399 +0.1955819.05 3 2.54 19.05 –0.3276617.399 –0.11176 15.9334216.3068 +0.317517.399 +0.1447819.05 66 0.750—12 UN 2 2.11666719.00682 –0.2895617.63268 –0.1397 16.4109416.764 +0.457217.67586 +0.1828819.05 3 2.11666719.05 –0.2895617.67586 –0.10414 16.4541216.764 +0.27178 17.67586 +0.1371619.05 67 0.750—16 UNF 1 1.5875 19.0119 –0.3606817.98066 –0.1905 17.0637217.3228 +0.355618.01876 +0.2489219.05 2 1.5875 19.0119 –0.2387617.98066 –0.127 17.0637217.3228 +0.355618.01876 +0.165119.05 3 1.5875 19.05 –0.2387618.01876 –0.09652 17.1018217.3228 +0.223518.01876 +0.1244619.05 68 0.750—20 UNEF 2 1.27 19.01698 –0.2057418.19148 –0.11176 17.4599617.6784 +0.279418.2245 +0.1447819.05 3 1.27 19.05 –0.2057418.2245 –0.08382 17.4929817.6784 +0.195618.2245 +0.1092219.05序号规格代号系列代号等级螺距外螺纹内螺纹名义直径每英寸牙数外径中径内径小径中径大径 69 0.750—28 UN 2 0.90714319.0195 –0.165118.43024 –0.09652 17.907 18.0594 +0.228618.46072 +0.127 19.05 3 0.90714319.05 –0.165118.46072 –0.0736617.9374818.0594 +0.167618.46072 +0.0939819.05 70 0.750—32 UN 2 0.79375 19.02206 –0.152418.50644 –0.0914418.0492418.1864 +0.203218.53438 +0.1193819.05 3 0.79375 19.05 –0.152418.53438 –0.0685818.0771818.1864 +0.149918.53438 +0.0914419.05 71 0.8125—12 UN 2 2.11666720.59432 –0.2895619.22018 –0.1397 17.9984418.3388 +0.457219.26336 +0.1828820.6375 3 2.11666720.6375 –0.2895619.26336 –0.1041418.0416218.3388 +0.276919.26336 +0.1371620.6375 72 0.8125—16 UN 2 1.5875 20.5994 –0.2387619.56816 –0.1244618.6512218.923 +0.355619.60626 +0.1600220.6375 3 1.5875 20.6375 –0.2387619.60626 –0.0914418.6893218.923 +0.21082 19.60626 +0.1193820.6375 73 0.8125—20 UNEF 2 1.27 20.60448 –0.2057419.77898 –0.1117619.0474619.2532 +0.304819.812 +0.1447820.6375 3 1.27 20.6375 –0.2057419.812 –0.8382 19.0804819.2532 +0.208319.812 +0.1092220.6375 74 0.8125—28 UN 2 0.90714320.607 –0.165120.01774 –0.0965219.4945 19.6596 +0.203220.04822 +0.12720.6375 3 0.90714320.6375 –0.165120.04822 –0.0736619.5249819.6596 +0.154920.04822 +0.0939820.6375 75 0.8125—32 UN 2 0.79375 20.60956 –0.152420.09394 –0.0914419.6367419.7866 +0.177820.12188 +0.1193820.6375 3 0.79375 20.6375 –0.152420.12188 –0.0685819.6646819.7866 +0.137220.12188 +0.0914420.6375 76 0.875—9 UNC 1 2.82222222.17674 –0.5283220.34286 –0.2413 18.7147219.177 +0.5842 20.39112 +0.3124222.225 2 2.82222222.17674 –0.3530620.34286 –0.1600218.7147219.177 +0.5842 20.39112 +0.2082822.225 3 2.82222222.225 –0.3530620.39112 –0.1193818.7629819.177 +0.33274 20.39112 +0.1549422.225 77 0.875—12 UN 2 2.11666722.18182 –0.2895620.80768 –0.1397 19.5859419.939 +0.457220.85086 +0.1828822.225 3 2.11666722.225 –0.2895620.85086 –0.10414 19.6291219.939 +0.2590820.85086 +0.1371622.225 78 0.875—14 UNF 1 1.81428622.18436 –0.393721.0058 –0.20574 19.9593220.2692 +0.406421.04644 +0.2692422.225 2 1.81428622.18436 –0.2616221.0058 –0.13716 19.9593220.2692 +0.406421.04644 +0.177822.225 3 1.81428622.225 –0.2616221.04644 –0.10414 19.9999620.2692 +0.223521.04644 +0.1346222.225 79 0.875—16 UN 2 1.5875 22.1869 –0.2387621.15566 –0.12446 20.2387220.4978 +0.355621.19376 +0.1600222.225 3 1.5875 22.225 –0.2387621.19376 –0.09144 20.2768220.4978 +0.223521.19376 +0.1193822.225 80 0.875—20 UNEF 2 1.27 22.19198 –0.2057421.36648 –0.11176 20.6349620.8534 +0.279421.3995 +0.1447822.225 3 1.27 22.225 –0.2057421.3995 –0.08382 20.6679820.8534 +0.195621.3995 +0.1092222.225。

常用螺纹尺寸及公差汇总表

1/4-18NPSM
06
3/8-18NPSM
08
1/2-14NPSM
12
3/4-14NPSM
16
20
24
32
40
48
3-8NPSM
NPT布锥管螺纹
标号
螺纹代号
基面上的直径
螺纹长度
端面大径
大径
中径
小径
管端至基面长
有效长度
02
Z1/8*27
04
Z1/4*18
06
Z3/8*18
08
Z1/2*14
12
Z3/4*14
公制螺纹
根本直径
内螺纹公差等级
外螺纹公差
大径
中径
小径
6H
7H
6G
中径公差
小径公差
中径公0,差
小径公差
中径公差
小径公差
M10*1
10
,
M12*1
12
,
M14*1
14
,
12
14
12
14
16
18
20
22
14
26
27
30
33
36
39
42
M27*2
27
M30*2
30
08
M33*2
33
08
M36*2
36
08
M39*2
39
08
M42*2
42
08
M45*2
45
08
M52*2
52
M60*2
60
M64*2
64
M72*2
72
美制NPSM螺纹〔美国标准ANSI B机械连接用直管螺纹60度〕

常用螺纹尺寸及公差汇总表

20
1.11/16*12UN
24
2*12UN
SAE螺纹
06
5/8×18UNF
12
1.1/16*14UNF
其他美制螺纹
9/16*16UN
7/8*12UN
2.1/4*12UN
可拆式芯子与套筒连接螺纹
软管编号
螺纹代号
外螺纹
内螺纹
公差品级2B
年夜径
中径
小径
小径
中径
年夜径
最年夜
最小
最年夜
最小
最小
最年夜
最小
最年夜
最年夜值
02
1/8-27NPSM
04
1/4-18NPSM
06
3/8-18NPSM
08
1/2-14NPSM
12
3/4-14NPSM
16
20
24
32
40
48
3-8NPSM
NPT布锥管螺纹
标号
螺纹代号
基面上的直径
螺纹长度
端面年夜径
年夜径
中径
小径
管端至基面长有效长度Βιβλιοθήκη 02Z1/8*27
04
Z1/4*18
06
Z3/8*18
06
G3/8*19
0.125, 0
0.445, 0
08
G1/2*14
0.142, 0
0.541, 0
10
G5/8*14
0.142, 0
0.541, 0
12
G3/4*14
0.142, 0
0.541, 0
16
G1*11
0.180, 0
0.640, 0
20

螺纹中径对照表

G2*11
，0
，0
0，
0，
0，
0，
40
2*11
，0
，0
0，
0，
0，
0，
48
G3*11
，0
，0
0，
0，
0，
0，
55度英锥管螺纹
标号
螺纹代号
基面上的直径
基准长度
有效螺纹长度
圆锥内螺纹基面轴向位移的极限偏差
端面大径
大径
中径
小径
基本
最大
最小
基本
最大
最小
02
R1/8*28
4
04
R1/4*19
6
11
06
R3/8*19
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。
外螺纹小端大径最小
外螺纹小端大径最大
外螺纹全牙长度
内螺纹大端中径
内螺纹小端中径
内螺纹大端小径最小
内螺纹大端小径最大
内螺纹全牙长度
2
1/8-27NPTF
4
1/4-18NPTF
6
3/8-18NPTF
8
1/2-14NPTF
12
3/4-14NPTF
16
20
24
32
40
2-8NPTF
48
3-8NPTF
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
0,+
0,+
0,+
,
,
M30*2
30
0,+
0,+
0,+
0,+

英制螺纹尺寸公差表

英制螺纹尺寸公差表单位：毫米规格代号系列代号等级螺距外螺纹内螺纹名义直径每英寸牙数外径中径内径小径中径大径1 0.060—80 （0#—80）UNF2 0.3175 1.5113 –0.08128 1.30556 –0.04572 1.12268 1.1811+0.12446 1.3182 +0.05842 1.5243 0.3175 1.5240 –0.08128 1.3182 –0.03302 1.13538 1.1811 +0.12446 1.3182 +0.04318 1.5242 0.073—64 （1#—64）UNC 2 0.396875 1.83896 –0.09652 1.58242 –0.0508 1.35128 1.42494+0.15748 1.59766 +0.06604 1.8542 3 0.396875 1.8542 –0.09652 1.59766 –0.0381 1.36652 1.42494+0.15748 1.59766 +0.04826 1.85423 0.073—72 （1#—72）UNF 2 0.352777 1.83896 –0.0889 1.61036 –0.04826 1.40716 1.4732 +0.1397 1.6256 +0.0635 1.85423 0.352777 1.8542 –0.0889 1.6256 –0.03556 1.4224 1.4732 +0.1397 1.6256 +0.04826 1.85424 0.086—56 （2#—56）UNC 2 0.453571 2.16916 –0.10414 1.87452 –0.05334 1.6129 1.69418 +0.1778 1.88976 +0.07112 2.18443 0.453571 2.1844 –0.10414 1.88976 –0.04064 1.62814 1.69418 +0.1778 1.88976 +0.05334 2.18445 0.086—64 （2#—64）UNF 2 0.396875 2.16916 –0.09652 1.91262 –0.0508 1.68148 1.75514 +0.15748 1.92786 +0.06858 2.18443 0.396875 2.1844 –0.09652 1.92786 –0.0381 1.69672 1.75514 +0.15748 1.92786 +0.0508 2.18446 0.099—48 （3#—48）UNC 2 0.529166 2.49682 –0.1143 2.15392 –0.05842 1.84658 1.94056 +0.20574 2.1717 +0.07620 2.51463 0.529166 2.5146 –0.1143 2.1717 –0.04318 1.86436 1.94056 +0.20574 2.1717 +0.05588 2.51467 0.099—56 （3#—56）UNF 2 0.453571 2.49682 –0.10414 2.20218 –0.05588 1.94056 2.02438 +0.17272 2.21996 +0.07112 2.51463 0.453571 2.5146 –0.10414 2.21996 –0.04064 1.95834 2.02438 +0.17272 2.21996 +0.05334 2.51468 0.112—40 （4#—40）UNC 2 0.635 2.82448 –0.12954 2.413 –0.0635 2.0447 2.15646 +0.2286 2.43332 +0.08382 2.84483 0.635 2.8448 –0.12954 2.43332 –0.04826 2.06502 2.15646 +0.2286 2.43332 +0.06096 2.84489 0.112—48 （4#—48）UNF 2 0.529166 2.82702 –0.1143 2.48412 –0.06096 2.17678 2.27076 +0.18796 2.5019 +0.07874 2.84483 0.529166 2.8448 –0.1143 2.5019 –0.04572 2.19456 2.27076 +0.18796 2.5019 +0.05842 2.844810 0.125—40 （5#—40）UNC 2 0.635 3.15468 –0.12954 2.7432 –0.06604 2.3749 2.48666 +0.21082 2.76352 +0.08382 3.1753 0.635 3.175 –0.12954 2.76352 –0.04826 2.39522 2.48666 +0.21082 2.76352 +0.0635 3.17511 0.125—44 （5#—44）UNF 2 0.577273 3.15722 –0.12192 2.7813 –0.0635 2.44856 2.55016 +0.1905 2.79908 +0.08128 3.1753 0.577273 3.175 –0.12192 2.79908 –0.04826 2.46634 2.55016 +0.1905 2.79908 +0.06096 3.17512 0.138—32 （6#—32）UNC 2 0.79375 3.48488 –0.1524 2.96926 –0.07112 2.51206 2.6416+0.254 2.98958 +0.09398 3.50523 0.79375 3.5052 –0.1524 2.98958 –0.05334 2.53238 2.6416+0.254 2.98958 +0.06858 3.505213 0.138—40 （6#—40）UNF 2 0.635 3.48488 –0.12954 3.0734 –0.06604 2.7051 2.8194+0.2032 3.09372 +0.08636 3.50523 0.635 3.5052 –0.12954 3.09372 –0.0508 2.72542 2.8194 +0.19304 3.09372 +0.0635 3.5052序号规格代号系列代号等级螺距外螺纹内螺纹名义直径每英寸牙数外径中径内径小径中径大径 14 0.164—32 （8#—32）UNC 2 0.79375 4.14274 –0.1524 3.62712 –0.07366 3.16992 3.302 +0.2286 3.64998 +0.09652 4.1656 3 0.79375 4.1656 –0.1524 3.64998 –0.05588 3.19278 3.302 +0.22606 3.64998 +0.07112 4.1656 15 0.164—36 （8#—36）UNF 2 0.70555 4.14528 –0.1397 3.68808 –0.07112 3.27914 3.4036 +0.2032 3.7084 +0.09144 4.1656 3 0.70555 4.1656 –0.1397 3.7084 –0.05334 3.29946 3.4036 +0.19304 3.7084 +0.06858 4.1656 16 0.190—24 （10#—24）UNC 2 1.05833 4.8006 –0.18288 4.11226 –0.08382 3.50266 3.683 +0.2794 4.13766 +0.10922 4.826 3 1.05833 4.826 –0.18288 4.13766 –0.0635 3.52806 3.683 +0.2667 4.13766 +0.08128 4.826 17 0.190—32（10#—32）UNF 2 0.79375 4.80314 –0.1524 4.28752 –0.0762 3.83032 3.9624 +0.20324.31038 +0.09906 4.826 3 0.79375 4.826 –0.1524 4.31038 –0.05842 3.85318 3.9624 +0.205744.31038 +0.07366 4.826 18 0.216—24 UNC 2 1.058335.461 –0.18288 4.77266 –0.08636 4.16306 4.3434 +0.2544.79806 +0.111765.4864 3 1.05833 5.4864 –0.18288 4.79806 –0.06604 4.18846 4.3434 +0.246384.79806 +0.83825.4864 19 0.216—28 UNF 2 0.90714 5.461 –0.1651 4.87172 –0.08128 4.34848 4.4958 +0.22864.89712 +0.106685.4864 3 0.90714 5.4864 –0.1651 4.89712 –0.06096 4.37388 4.4958 +0.220984.89712 +0.078745.4864 20 0.216—32 UNEF 2 0.79375 5.46354 –0.1524 4.94792 –0.07874 4.49072 4.6228 +0.20324.97078 +0.104145.4864 3 0.79375 5.4864 –0.1524 4.97078 –0.06096 4.51358 4.6228 +0.19054.97078 +0.078745.4864 21 0.250—20 1/4—20 UNC 1 1.276.32206 –0.30988 5.49656 –0.14224 4.76504 4.9784 +0.27945.5245 +0.185426.35 2 1.27 6.32206 –0.20574 5.49656 –0.09398 4.76504 4.9784 +0.27945.5245 +0.124466.35 3 1.27 6.35 –0.20574 5.5245 –0.07112 4.79298 4.9784 +0.271785.5245 +0.091446.35 22 0.250—28 1/4—28UNF 1 0.90714 6.3246 –0.24892 5.73532 –0.127 5.21208 5.3594 +0.22865.76072 +0.16516.35 2 0.90714 6.3246 –0.1651 5.73532 –0.08382 5.21208 5.3594 +0.22865.76072 +0.109226.35 3 0.90714 6.35 –0.1651 5.76072 –0.0635 5.23748 5.3594 +0.20325.76072 +0.081286.35 23 0.250—32 1/4—32UNEF 2 0.79375 6.3246 –0.1524 5.80898 –0.8128 5.35178 5.4864 +0.20325.83438 +0.106686.35 3 0.79375 6.35 –0.1524 5.83438 –0.6096 5.37718 5.4864 +0.175265.83438 +0.078746.35 24 .3125－18 5/16－18UNC 1 1.411117.90702 –0.33274 6.99008 –0.15494 6.17474 6.4008 +0.33027.02056 +0.200667.9375 2 1.411117.90702 –0.22098 6.99008 –0.1016 6.17474 6.4008 +0.33027.02056 +0.134627.9375 3 1.411117.9375 –0.220987.02056 –0.0762 6.20522 6.4008 +0.27947.02056 +0.099067.9375序号规格代号系列代号等级螺距外螺纹内螺纹名义直径每英寸牙数外径中径内径小径中径大径 25 .3125—20 5/16—20UN 21.27 7.90702 –0.205747.08152 –0.1016 6.35 6.5532 +0.30487.112 +0.132087.9375 31.27 7.9375 –0.205747.112 –0.0762 6.38048 6.5532 +0.2547.112 +0.099067.9375 26 .3125—24 5/16—24UNF 11.0583337.90956 –0.274327.22122 –0.1397 6.61162 6.7818 +0.2547.24916 +0.180347.9375 21.0583337.90956 –0.182887.22122 –0.09398 6.61162 6.7818 +0.2547.24916 +0.121927.9375 31.0583337.9375 –0.182887.24916 –0.6858 6.63956 6.7818 +0.21336 7.24916 +0.091447.9375 27 .3125—28 5/16—28UN 20.90714 7.9121 –0.16517.32282 –0.8636 6.79958 6.9596 +0.20327.34822 +0.111767.9375 30.90714 7.9375 –0.16517.34822 –0.06604 6.82498 6.9596 +0.17018 7.34822 +0.083827.9375 28 .3125—32 5/16—32UNEF 20.79375 7.9121 –0.15247.39648 –0.08128 6.93928 7.0866 +0.17787.42188 +0.106687.9375 30.79375 7.9375 –0.15247.42188 –0.06096 6.96468 7.0866 +0.14478 7.42188 +0.78747.9375 29 0.375—16 3/8—16 UNC 11.5875 9.49198 –0.360688.46074 –0.1651 7.5438 7.7978 +0.35568.49376 +0.21599.525 21.5875 9.49198 –0.238768.46074 –0.11176 7.5438 7.7978 +0.35568.49376 +0.144789.525 31.5875 9.525 –0.238768.49376 –0.08382 7.57682 7.7978 +0.28448 8.49376 +0.109229.525 30 0.375—20 3/8—20UN 21.27 9.49452 –0.205748.66902 –0.10414 7.9375 8.1534 +0.27948.6995 +0.137169.525 31.27 9.525 –0.205748.6995 –0.07874 7.96798 8.1534 +0.22098 8.6995 +0.10169.525 31 0.375—24 3/8—24UNF 11.0583339.49706 –0.274328.80872 –0.14478 8.19912 8.382 +0.2548.83666 +0.18796 9.525 21.0583339.49706 –0.182888.80872 –0.09652 8.19912 8.382 +0.2548.83666 +0.12466 9.525 31.0583339.525 –0.182888.83666 –0.07366 8.22706 8.382 +0.182888.83666 +0.09398 9.525 32 0.375—28 3/8—28UN 20.90714 9.49706 –0.16518.90778 –0.09144 8.38454 8.5344 +0.22868.93572 +0.116849.525 30.90714 9.525 –0.16518.93572 –0.06858 8.41248 8.5344 +0.16764 8.93572 +0.08899.525 33 0.375—32 3/8—32UNEF 20.79375 9.4996 –0.15248.98398 –0.08636 8.52678 8.6614 +0.20329.00938 +0.111769.525 30.79375 9.525 –0.15249.00938 –0.0635 8.55218 8.6614 +0.14986 9.00938 +0.083829.525 34 0.4375—14 UNC 11.81428611.07694 –0.39379.89838 –0.18034 8.8519 9.144 +0.40649.93394 +0.2336811.1125 2 1.81428611.07694 –0.261629.89838 –0.11938 8.8519 9.144 +0.40649.93394 +0.1549411.1125 3 1.81428611.1125 –0.261629.93394 –0.0889 8.88746 9.144 +0.297189.93394 +0.1168411.1125 35 0.4375—16 UN 2 1.5875 11.07694 –0.2387610.0457 –0.11684 9.12876 9.398 +0.355610.08126 +0.1498611.1125 3 1.5875 11.1125 –0.2387610.08126 –0.08636 9.16432 9.398 +0.25410.08126 +0.114311.1125号代号级名义直径每英寸牙数外径中径内径小径中径大径 36 0.4375—20 UNF 11.27 11.07948 –0.3098810.25398 –0.160029.52246 9.7282 +0.304810.287 +0.2057411.1125 2 1.27 11.07948 –0.2057410.25398 –0.106689.52246 9.7282 +0.304810.287 +0.1371611.1125 3 1.27 11.1125 –0.2057410.287 –0.078749.55548 9.7282 +0.21844 10.287 +0.1041411.1125 37 0.4375—28 UNEF 2 0.90714311.08456 –0.165110.49528 –0.091449.97204 10.1346 +0.203210.52322 +0.1168411.1125 3 0.90714311.1125 –0.165110.52322 –0.068589.99998 10.1346 +0.154910.52322 +0.0889 11.1125 38 0.4375—32 UN 2 0.79375 11.0871 –0.152410.57148 –0.0863610.11248 10.2616 +0.177810.59688 +0.1117611.1125 3 0.79375 11.1125 –0.152410.59688 –0.0635 10.1396810.2616 +0.137210.59688 +0.0838211.1125 39 0.500—13 UNC 1 1.95384612.6619 –0.4140211.3919 –0.1879610.2641410.5918 +0.431811.43 +0.2463812.7 2 1.95384612.6619 –0.2768611.3919 –0.12710.2641410.5918 +0.431811.43 +0.165112.7 3 1.95384612.700 –0.2768611.43 –0.0939810.3022410.5918 +0.289611.43 +0.1219212.7 40 0.500—16 UN 2 1.5875 12.66444 –0.2387611.6332 –0.1193810.7162610.9728 +0.355611.66876 +0.1549412.7 3 1.5875 12.700 –0.2387611.66876 –0.088910.7518210.9728 +0.251511.66876 +0.1168412.7 41 0.500—20 UNF 1 1.27 12.66698 –0.3098811.84148 –0.1625611.10996 11.3284 +0.431811.8745 +0.2133612.7 2 1.27 12.66698 –0.2057411.84148 –0.1092211.10996 11.3284 +0.431811.8745 +0.1422412.7 3 1.27 12.700 –0.2057411.8745 –0.0812811.14298 11.3284 +0.195611.8745 +0.1066812.7 42 0.500—28 UNEF 2 0.90714312.67206 –0.165112.08278 –0.0939811.55954 11.7094 +0.228612.11072 +0.1219212.7 3 0.90714312.700 –0.165112.11072 –0.0711211.58748 11.7094 +0.167612.11072 +0.0914412.7 43 0.500—32 UN 2 0.79375 12.6746 –0.152412.15898 –0.0889 11.70178 11.8364 +0.203212.18438 +0.114312.7 3 0.79375 12.700 –0.152412.18438 –0.0660411.72718 11.8364 +0.149812.18438 +0.0863612.7 44 0.5625—12 UNC 1 2.11666714.24686 –0.4368812.87272 –0.1981211.65098 11.9888 +0.457212.91336 +0.2590814.2875 2 2.11666714.24686 –0.2895612.87272 –0.1320811.65098 11.9888 +0.457212.91336 +0.1727214.2875 3 2.11666714.2875 –0.2895612.91336 –0.0990611.70178 11.9888 +0.312412.91336 +0.1295414.2875 45 0.5625—16 UN 2 1.5875 14.25194 –0.2387613.2207 –0.1193812.3037612.573 +0.355613.25626 +0.1549414.2875 3 1.5875 14.2875 –0.2387613.25626 –0.0889 12.3393212.573 +0.228613.25626 +0.1168414.2875号代号级名义直径每英寸牙数外径中径内径小径中径大径 46 0.5625—18 UNF 11.41111 14.25194 –0.3327413.335 –0.17272 12.5196612.7508 +0.330213.37056 +0.2260614.2875 2 1.41111 14.25194 –0.2209813.335 –0.1143 12.5196612.7508 +0.330213.37056 +0.1498614.2875 3 1.41111 14.2875 –0.2209813.37056 –0.8636 12.5552212.7508 +0.218413.37056 +0.1117614.2875 47 0.5625—20 UN 2 1.27 14.25448 –0.2057413.42898 –0.10668 12.6974612.9032 +0.304813.462 +0.139714.2875 3 1.27 14.2875 –0.2057413.462 –0.08128 12.7304812.9032 +0.208313.462 +0.1041414.2875 48 0.5625—24 UNEF 2 1.05833 14.25702 –0.1828813.56868 –0.09906 12.9590813.1318 +0.25413.59916 +0.1295414.2875 3 1.05833 1402875 –0.1828813.59916 –0.07366 12.9895613.1318 +0.187913.59916 +0.0965214.2875 49 0.5625—28 UN 2 0.90714 14.25956 –0.165113.67028 –0.09398 13.1470413.3096 +0.203213.69822 +0.1168414.2875 3 0.90714 14.2875 –0.165113.69822 –0.07112 13.1749813.3096 +0.154913.69822 +0.0914414.2875 50 0.5625—32 UN 2 0.79375 14.2621 –0.152413.74648 –0.0889 13.2892813.4366 +0.177813.77188 +0.114314.2875 3 0.79375 14.2875 –0.152413.77188 –0.06604 13.3146813.4366 +0.137213.77188 +0.0863614.2875 51 0.625—11 UNC 1 2.30909 15.83436 –0.4622814.33576 –0.21082 13.0022613.3858 +0.482614.3764 +0.2717815.875 2 2.30909 15.83436 –0.3073414.33576 –0.1397 13.0022613.3858 +0.482614.3764 +0.1828815.875 3 2.30909 15.875 –0.3073414.3764 –0.10414 13.0429 13.3858 +0.307314.3764 +0.1371615.875 52 0.625—12 UN 2 2.11666715.83436 –0.2895614.46022 –0.13716 12.9844813.589 +0.457214.50086 +0.1803415.875 3 2.11666715.875 –0.2895614.50086 –0.10414 13.2791213.589 +0.2870214.50086 +0.1346215.875 53 0.625—16 UN 2 1.5875 15.83944 –0.2387614.8082 –0.12192 13.8912614.1478 +0.355614.84376 +0.1574815.875 3 1.5875 15.875 –0.2387614.84376 –0.09144 13.9268214.1478 +0.233714.84376 +0.1168415.875 54 0.625—18 UNF 1 1.41111115.83944 –0.3327414.9225 –0.1778 14.1071614.351 +0.330214.95806 +0.2311415.875 2 1.41111115.83944 –0.2209814.9225 –0.11938 14.1071614.351 +0.330214.95806 +0.152415.875 3 1.41111115.875 –0.2209814.95806 –0.0889 14.1427214.351 +0.203214.95806 +0.114315.875 55 0.625—20 UN 2 1.27 15.84198 –0.2057415.01648 –0.10922 14.2849614.5034 +0.279415.0495 +0.1422415.875 3 1.27 15.875 –0.2057415.0495 –0.08128 14.3179814.5034 +0.195615.0495 +0.1066815.875 56 0.625—24 UNEF 2 1.05833 15.84452 –0.1828815.15618 –0.1016 14.5465814.732 +0.25415.18666 +0.1320815.875 3 1.05833 15.875 –0.1828815.18666 –0.0762 14.5770614.732 +0.1752615.18666 +0.0990615.875序号规格代号系列代号等级螺距外螺纹内螺纹名义直径每英寸牙数外径中径内径小径中径大径 57 0.625—28 UN 2 0.90714315.84706 –0.165115.25778 –0.09652 14.7345414.8844 +0.228615.28572 +0.1244615.875 3 0.90714315.875 –0.165115.28572 –0.0711214.7624814.8844 +0.167615.28572 +0.0939815.875 58 0.625—32 UN 2 0.79375 15.84706 –0.152415.33144 –0.0914414.8742415.0114 +0.203215.35938 +0.1168415.875 3 0.79375 15.875 –0.152415.35938 –0.0685814.9021815.0114 +0.149915.35938 +0.088915.875 59 0.6875—12 UN 2 2.11667 17.42186 –0.2895616.04772 –0.1371614.8259815.1638 +0.457216.08836 +0.1803417.4625 3 2.11667 17.4625 –0.2895616.08836 –0.1041414.8666215.1638 +0.292116.08836 +0.1346217.4625 60 0.6875—16 UN 2 1.5875 17.42694 –0.2387616.3957 –0.12192 15.4787615.748 +0.355616.43126 +0.1574817.4625 3 1.5875 17.4625 –0.2387616.43126 –0.0914415.5143215.748 +0.21336 16.43126 +0.1168417.4625 61 0.6875—20 UN 2 1.27 17.42948 –0.2057416.60398 –0.1092 15.8724616.0782 +0.304816.637 +0.1422417.4625 3 1.27 17.4625 –0.2057416.637 –0.08128 15.9054816.0782 +0.208316.637 +0.1066817.4625 62 0.6875—24 UNEF 2 1.05833317.43202 –0.1828816.74368 –0.1016 16.1340816.3068 +0.25416.77416 +0.1320817.4625 3 1.05833317.4625 –0.1828816.77416 –0.0762 16.1645616.3068 +0.188016.77416 +0.0990617.4625 63 0.6875—28 UN 2 0.90714317.43456 –0.165116.84528 –0.09652 16.3220416.4846 +0.203216.87322 +0.1246617.4625 3 0.90714317.4625 –0.165116.87322 –0.07112 16.3499816.4846 +0.154916.87322 +0.0939817.4625 64 0.6875—32 UN 2 0.79375 17.43456 –0.152416.91894 –0.09144 16.4617416.6116 +0.177816.94688 +0.1168417.4625 3 0.79375 17.4625 –0.152416.94688 –0.06858 16.4896816.6116 +0.137216.94688 +0.088917.4625 65 0.750—10 UNC 1 2.54 19.00428 –0.4927617.35328 –0.22352 15.8877 16.3068 +0.533417.399 +0.292119.05 2 2.54 19.00428 –0.3276617.35328 –0.14986 15.8877 16.3068 +0.533417.399 +0.1955819.05 3 2.54 19.05 –0.3276617.399 –0.11176 15.9334216.3068 +0.317517.399 +0.1447819.05 66 0.750—12 UN 2 2.11666719.00682 –0.2895617.63268 –0.1397 16.4109416.764 +0.457217.67586 +0.1828819.05 3 2.11666719.05 –0.2895617.67586 –0.10414 16.4541216.764 +0.27178 17.67586 +0.1371619.05 67 0.750—16 UNF 1 1.5875 19.0119 –0.3606817.98066 –0.1905 17.0637217.3228 +0.355618.01876 +0.2489219.05 2 1.5875 19.0119 –0.2387617.98066 –0.127 17.0637217.3228 +0.355618.01876 +0.165119.05 3 1.5875 19.05 –0.2387618.01876 –0.09652 17.1018217.3228 +0.223518.01876 +0.1244619.05 68 0.750—20 UNEF 2 1.27 19.01698 –0.2057418.19148 –0.11176 17.4599617.6784 +0.279418.2245 +0.1447819.05 3 1.27 19.05 –0.2057418.2245 –0.08382 17.4929817.6784 +0.195618.2245 +0.1092219.05序号规格代号系列代号等级螺距外螺纹内螺纹名义直径每英寸牙数外径中径内径小径中径大径 69 0.750—28 UN 2 0.90714319.0195 –0.165118.43024 –0.09652 17.907 18.0594 +0.228618.46072 +0.127 19.05 3 0.90714319.05 –0.165118.46072 –0.0736617.9374818.0594 +0.167618.46072 +0.0939819.05 70 0.750—32 UN 2 0.79375 19.02206 –0.152418.50644 –0.0914418.0492418.1864 +0.203218.53438 +0.1193819.05 3 0.79375 19.05 –0.152418.53438 –0.0685818.0771818.1864 +0.149918.53438 +0.0914419.05 71 0.8125—12 UN 2 2.11666720.59432 –0.2895619.22018 –0.1397 17.9984418.3388 +0.457219.26336 +0.1828820.6375 3 2.11666720.6375 –0.2895619.26336 –0.1041418.0416218.3388 +0.276919.26336 +0.1371620.6375 72 0.8125—16 UN 2 1.5875 20.5994 –0.2387619.56816 –0.1244618.6512218.923 +0.355619.60626 +0.1600220.6375 3 1.5875 20.6375 –0.2387619.60626 –0.0914418.6893218.923 +0.21082 19.60626 +0.1193820.6375 73 0.8125—20 UNEF 2 1.27 20.60448 –0.2057419.77898 –0.1117619.0474619.2532 +0.304819.812 +0.1447820.6375 3 1.27 20.6375 –0.2057419.812 –0.8382 19.0804819.2532 +0.208319.812 +0.1092220.6375 74 0.8125—28 UN 2 0.90714320.607 –0.165120.01774 –0.0965219.4945 19.6596 +0.203220.04822 +0.12720.6375 3 0.90714320.6375 –0.165120.04822 –0.0736619.5249819.6596 +0.154920.04822 +0.0939820.6375 75 0.8125—32 UN 2 0.79375 20.60956 –0.152420.09394 –0.0914419.6367419.7866 +0.177820.12188 +0.1193820.6375 3 0.79375 20.6375 –0.152420.12188 –0.0685819.6646819.7866 +0.137220.12188 +0.0914420.6375 76 0.875—9 UNC 1 2.82222222.17674 –0.5283220.34286 –0.2413 18.7147219.177 +0.5842 20.39112 +0.3124222.225 2 2.82222222.17674 –0.3530620.34286 –0.1600218.7147219.177 +0.5842 20.39112 +0.2082822.225 3 2.82222222.225 –0.3530620.39112 –0.1193818.7629819.177 +0.33274 20.39112 +0.1549422.225 77 0.875—12 UN 2 2.11666722.18182 –0.2895620.80768 –0.1397 19.5859419.939 +0.457220.85086 +0.1828822.225 3 2.11666722.225 –0.2895620.85086 –0.10414 19.6291219.939 +0.2590820.85086 +0.1371622.225 78 0.875—14 UNF 1 1.81428622.18436 –0.393721.0058 –0.20574 19.9593220.2692 +0.406421.04644 +0.2692422.225 2 1.81428622.18436 –0.2616221.0058 –0.13716 19.9593220.2692 +0.406421.04644 +0.177822.225 3 1.81428622.225 –0.2616221.04644 –0.10414 19.9999620.2692 +0.223521.04644 +0.1346222.225 79 0.875—16 UN 2 1.5875 22.1869 –0.2387621.15566 –0.12446 20.2387220.4978 +0.355621.19376 +0.1600222.225 3 1.5875 22.225 –0.2387621.19376 –0.09144 20.2768220.4978 +0.223521.19376 +0.1193822.225 80 0.875—20 UNEF 2 1.27 22.19198 –0.2057421.36648 –0.11176 20.6349620.8534 +0.279421.3995 +0.1447822.225 3 1.27 22.225 –0.2057421.3995 –0.08382 20.6679820.8534 +0.195621.3995 +0.1092222.225。

各国标准螺纹基本尺寸对照表

英制锥管螺纹基本尺寸及公差牙形角55ºBSPT公制螺纹基本尺寸及公差牙形角60ºM55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达55°圆锥管螺纹BSPTR66" 11聊城市鑫茂祥管业有限公司专业经营钢管规格：5mm1mm—1020mm200mm合金钢管、外径22mm-127mm冷轧无缝钢管、外径127mm-600mm,壁厚16mm-100mm,外径精度±%,壁厚精度±5%热轧中厚壁无缝钢管、16Mn外径400—1600mm、壁厚20—60mm 的大口径厚壁卷管,可定尺到16米及各种规格的无缝方管、异型无缝钢管等.常备钢管种类有:构造用无缝钢管、流体用无缝钢管、液压无缝钢管、电力用无缝钢管、石油输送用无缝钢管、化肥设备用无缝钢管、煤矿用无缝钢管、不锈钢无缝钢管、化工用无缝钢管、纺织机械用无缝钢管、汽车；水利用无缝钢管,精密无缝钢管、光亮无缝钢管、军工医疗用无缝钢管、管道用无缝钢管、支柱用无缝钢管、合金无缝管、高压无缝管、大口径直缝焊管等;适用于工程、煤矿、纺织、电力、锅炉、机械、军工等各个领域;公司以良好的信用、优质的产品、雄厚的实力、低廉的价钱享誉全国30多个省、市、自治区、直辖市及国外,产品深得用户依赖;管螺纹的基本尺寸表2010-10-25 15:57:35标签：表1螺纹基本尺寸G1/2 、ZG1/2 单位:mm尺寸代号每类的牙数n螺距p 牙型高度h圆弧半径r≈基面上的基本直径基准距离有效螺纹长度大径基准直径d=D中径d2=D2小径d1=D11/16 28 1/8 28 1/4 19 3/8 19 1/2 14 3/4 14 1 11 4 11 2 11 2 112 113 11 2 11锥管螺纹的基本尺寸表3-281/2PT 、1/2NPT表2螺纹基本尺寸单位:mm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;一吋等于8分,1/4 吋就是2分,如此类推;国外常用英制螺纹的代号、名称和标准号：标准惠氏粗牙系列,一般用途圆柱螺纹标准惠氏细牙系列,一般用途圆柱螺纹附加的惠氏可选择系列,一般用途圆柱螺纹Whit 惠氏牙型的非标准螺纹以上为英国标准BS84 牙型角为55°的英制螺纹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以上为美国标准标准牙型牙底是平的或随意倒圆的的内、外螺纹圆弧牙底的UNR、UNRC、UNRF、UNRE F、NRS只用于外螺纹而没有内螺纹NPT②一般用途的锥管螺纹NPSC 管接头用直管螺纹NPTR 导杆连接用锥管螺纹NPSM 机械连接用直管螺纹NPSL 锁紧螺母用直管螺纹NPSH 软管连接用直管螺纹以上为美国标准牙型角为60°的英制管螺纹NPTF 干密封标准型锥管螺纹美国标准Ⅰ型PTF-SAE SHORT 干密封短型锥管螺纹美国标准Ⅱ型NPSF 干密封标准型燃油用直管内螺纹美国标准Ⅲ型NPS1 干密封标准型一般用直管内螺纹美国标准Ⅳ型ACME③一般用途的梯形螺纹美国标准牙型角为29°的英制传动螺纹①尺寸和公差使用与标准系列相同的公式计算的标准系列之外的所有直径与螺距组合;②我国的60°圆锥管螺纹GB/T12716-1991与之等效;③ACME螺纹包括一般用途的和定心的两种配合的梯形螺纹,其中一般用途者与我国标准GB/T5796-1986规定的梯形螺纹的性能相类同;螺距用每英寸的牙数来表示,如：每英寸11牙,则螺距＝11＝螺纹如何区分英制和公制默认分类2009-08-24 22:03:14 阅读1281 评论0 字号：大中小粗略判断的话好像英制的比公职的牙距大同规格的NPT,PT,G 都是管螺纹．NPT 是National American Pipe Thread 的縮寫,屬於美国標准的60 度锥管螺纹,用於北美地區．国家標准可查阅GB/T12716-1991PT 是Pipe Thread 的縮寫,是55 度密封圓锥管螺纹,屬惠氏螺紋家族,多用於欧洲及英联邦国家．常用於水及煤气管行业,锥度規定为1:16．国家標准可查阅GB/T7306-2000G 是55 度非螺纹密封管螺纹,屬惠氏螺紋家族．标记为G 代表圓柱螺紋．国家標准可查阅GB/T730 7-2001另外螺纹中的1/4、1/2、1/8 标记是指螺紋尺寸的直徑,單位是英吋．行內人通常用分來稱呼螺紋尺寸,一吋等於８分,1/4 吋就是２分,如此類推G 好像就是管螺纹的统称Guan,55,60度的划分属于功能性的,俗称管圆;即螺纹由一圆柱面加工而成;ZG俗称管锥,即螺纹由一圆锥面加工而成,一般的水管接头都是这样的,老国标标注为Rc公制螺纹用螺距来表示,美英制螺纹用每英寸内的螺纹牙数来表示,这是它们最大的区别,公制螺纹是60度等边牙型,英制螺纹是等腰55度牙型,美制螺纹60度;公制螺纹用公制单位, 美英制螺纹用英制单位;管螺纹主要用来进行管道的连接,其内外螺纹的配合紧密,有直管与锥管两种;公称直径是指所连接的管道直径,显然螺纹大径比公称直径大;1/4,1/2,1/8是英制螺纹的公称直径,单位是英寸;英制螺纹标准规格表寸Ww 牙型代号大径mmd=D螺距mmp每英寸牙数tpi中径mmd2=D2小径外螺纹d3牙型高H1底孔直径mm1/16" BSW 603/32" BSW 481/8" BSW 405/32" BSW 323/16" BSW 247/32" BSW 241/4" BSW 205/16" BSW 183/8" BSW 167/16" BSW 141/2" BSW 125/8" BSW 113/4" BSW 107/8" BSW 9 1" BSW 81 1/8"BSW 71 1/4"BSW 71 3/8"BSW 61 1/2"BSW 61 5/8"BSW 51 3/4"BSW 51 7/8"BSW 4 1/2 2" BSW 4 1/2 2 1/4BSW 4"2 1/2"BSW 42 3/4"BSW 3 1/2 3" BSW 3 1/2 3 1/4"BSW 3 1/4 3 1/2"BSW 3 1/4 3 3/4"BSW 3 4" BSW 34 1/4"BSW 2 7/8 4 1/2"BSW 2 7/8 4 3/4"BSW 2 3/4 5" BSW 2 3/4 5 1/4"BSW 2 5/8 5 1/2"BSW 2 5/8 5 3/4"BSW 2 1/2 6" BSW 2 1/2英制普通螺纹-- 细牙-- BSF 英制普通螺纹惠氏螺纹-- 细牙BSW名义尺寸BSF 牙型代号大径mmd=D螺距mmp每英寸牙数tpi中径mmd2=D2小径外螺纹d3牙型高H1底孔直径mm3/16 BSF 32 7/32 BSF 28 1/4 BSF 26 9/32 BSF 26 5/16 BSF 22 3/8 BSF 20 7/16 BSF 18 1/2 BSF 169/16 BSF 165/8 BSF 1411/16 BSF 143/4 BSF 1213/16 BSF 127/8 BSF 111 BSF 101 1/8 BSF 91 1/4 BSF 91 3/8 BSF 81 1/2 BSF 81 5/8 BSF 81 3/4 BSF 72 BSF 72 1/4 BSF 62 1/2 BSF 62 3/4 BSF 6 -3 BSF 5 -3 1/4 BSF5 -3 1/2 BSF4 1/2 -3 3/4 BSF 4 1/2 -4 BSF 4 1/2 -4 1/4 BSF 4 -螺纹标记的标注当螺纹精度要求较高时,除标注螺纹代号外,还应标注螺纹公差带代号和螺纹旋合长度;螺纹标记的标注格式为：螺纹代号—螺纹公差带代号中径、顶径—旋合长度有关标注内容的说明：1 公差带代号由数字加字母表示内螺纹用大写字母,外螺纹用小写字母,如7H、6g等,应特别指出,7H,6g等代表螺纹公差,而H7,g6代表圆柱体公差代号;2 旋合长度规定为短用S表示、中用N表示、长用L表示三种;一般情况下,不标注螺纹旋合长度,其螺纹公差带按中等旋合长度N确定;必要时,可加注旋合长度代号S或L,如“M20-5g6g－L”;特殊需要时,可注明旋合长度的数值,如“M20-5g6g－30”;相关链接。

常用螺纹尺寸及公差汇总表

常用螺纹尺寸及公差汇总表公制螺纹基本直径内螺纹公差等级小径6H 7H 6g中径公差小径公差中径公0,差小径公差中径公差8.917 0,+0.150 0,+0.236 0,+0.190 0,+0.300 -0.026,-0.138 10.917 0,+0.160 0,+0.236 0,+0.200 0,+0.300 -0.026,-0.144 122.917 0,+0.160 0,+0.236 0,+0.200 0,+0.300 -0.026,-0.144 10.647 0,+0.180 0,+0.265 0,+0.224 0,+0.335 -0.028,-0.160 12.647 0,+0.180 0,+0.265 0,+0.224 0,+0.335 -0.028,-0.160 10.376 0,+0.190 0,+0.300 0,+0.236 0,+0.375 -0.032,-0.172 12.376 0,+0.190 0,+0.300 0,+0.236 0,+0.375 -0.032,-0.172 14.376 0,+0.190 0,+0.300 0,+0.236 0,+0.375 -0.032,-0.172 16.376 0,+0.190 0,+0.300 0,+0.236 0,+0.375 -0.032,-0.172 18.376 0,+0.190 0,+0.300 0,+0.236 0,+0.375 -0.032,-0.172 20.376 0,+0.190 0,+0.300 0,+0.236 0,+0.375 -0.032,-0.172 22.376 0,+0.200 0,+0.300 0,+0.250 0,+0.375 -0.032,-0.182美制NPSM螺纹（美国标准ANSI B1.20.1机械连接用直管螺纹60度）NPT布锥管螺纹55度英锥管螺纹55度英锥管螺纹本大小本R1/8*28 9.728 9.147 8.566 4 4.9 3.1 6.5 R1/4*19 13.157 12.301 11.445 6 7.3 4.7 9.7美制螺纹可拆式芯子与套筒连接螺纹新西兰B09内螺纹NPTF+密封管螺纹备注：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。

螺纹中径对照表

螺纹中径对照表公制螺纹美制NPSM螺纹（美国标准ANSI B1.20.1机械连接用直管螺纹60度）NPT布锥管螺纹标号螺纹代号基面上的直径螺纹长度端面大径大径中径小径管端至基面长有效长度02 Z1/8*27 10.242 9.489 8.736 4.102 6.703 9.986 04 Z1/4*18 13.616 12.487 11.385 5.786 10.206 13.254 06 Z3/8*18 17.055 15.926 14.797 6.096 10.358 16.674 08 Z1/2*14 21.223 19.772 18.321 8.128 13.556 20.715 12 Z3/4*14 26.568 25.117 23.666 8.611 13.861 26.030 16 Z1*11.5 33.228 31.461 29.694 10.160 17.343 32.593 20 Z1.1/4*1.5 41.985 40.218 38.451 10.668 17.953 41.318 24 Z1.1/2*11.5 48.054 46.287 44.520 10.668 18.377 47.38732 Z2*11.5 60.092 58.325 56.558 11.074 19.215 59.400 40 Z2.1/2*8 72.699 70.159 67.619 17.323 28.892 71.616 48 Z3*8 88.608 86.068 83.528 19.456 30.480 87.39255度英锥管螺纹55度英锥管螺纹美制螺纹可拆式芯子与套筒连接螺纹新西兰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MAXB-09 0.860in*14 21.844 20.683 20.841 19.522NPTF+密封管螺纹备注：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。