美制螺纹尺寸表(mm)

美制螺纹尺寸表 外螺纹 公称 螺纹牙牙螺公差螺纹外径螺纹中径螺纹小径公差螺纹 直径规格数高距代号MaxMinMaxMinMax代号Min 0.073（#1）1-64UNC640.2360.3972A1.838961.742441.582421.531621.366522B1.42494 1.8543A1.85421.757681.597661.559561.381763B1.42494 1-72UNF720.210.3532A1.838961.750061.610361.56211.419862B1.4732 3A1.85421.76531.62561.590041.43513B1.4732 0.086(#2)2-56UNC560.2710.4542A2.169162.065021.874521.821181.630682B1.69418 2.1843A2.18442.080261.889761.849121.645923B1.69418 2-64UNF640.2360.3972A2.169162.072641.912621.861821.696722B1.75514 3A2.18442.087881.927861.889761.711963B1.75514 0.099(3#)3-48UNC480.3150.5292A2.496822.382522.153922.09551.864362B1.94056 2.5153A2.51462.40032.17172.128521.882143B1.94056 3-56UNF560.2710.4542A2.496822.392682.202182.14631.958342B2.02438 3A2.51462.410462.219962.179321.976123B2.02438 0.112(#4)4-40UNC400.3780.6352A2.824482.694942.4132.34952.067562B2.15646 2.8453A2.84482.715262.433322.385062.087883B2.15646 4-48UNF480.3150.5292A2.827022.712722.484122.423162.194562B2.27076 3A2.84482.73052.50192.456182.212343B2.27076 0.125(#5)5-40UNC400.3780.6352A3.154683.025142.74322.677162.397762B2.48666 3.1753A3.1753.045462.763522.715262.418083B2.48666 5-44UNF440.3440.5772A3.157223.03532.78132.71782.468882B2.55016 3A3.1753.053082.799082.750822.486663B2.55016 0.138(#6）6-32UNC320.4720.7942A3.484883.332482.969262.898142.542B2.6416 3.5053A3.50523.35282.989582.936242.560323B2.6416 6-40UNF400.3780.6352A3.484883.355343.07343.007362.727962B2.8194 3A3.50523.375663.093723.042922.748283B2.8194 0.164（#8）8-32UNC320.4720.7842A4.142743.990343.627123.553463.197862B3.302 4.1663A4.16564.01323.649983.59413.220723B3.302 8-36UNF360.4210.7062A4.145284.005583.688083.616963.304542B3.4036 3A4.16564.02593.70843.655063.324863B3.4036 0.19（#10）10-24UNC240.631.0582A4.80064.617724.112264.028443.540762B3.683 4.8263A4.8264.643124.137664.074163.566163B3.683 10-28UNS280.540.9072A4.80064.63554.211324.12753.718562B3.8354 10-32UNF320.4720.7842A4.803144.650744.287524.211323.858262B3.9624 3A4.8264.67364.310384.251963.881123B3.9624 10-36UNS360.4210.7062A4.803144.663444.345944.269743.96242B4.064 10-40UNS400.3780.6352A4.803144.67364.391664.3184.043682B4.1402 10-48UNS480.3150.5292A4.805684.691384.462784.396744.175762B4.2418 10-56UNS560.2710.4542A4.808224.704084.513584.450084.269742B4.3434 0.216（#12）12-24UNC240.631.0582A5.4615.278124.772664.68634.201162B4.3434 0.4863A5.48645.303524.798064.732024.226563B4.3434 12-28UNF280.540.9072A5.4615.29594.871724.790444.378962B4.4958 3A5.48645.32134.897124.836164.404363B4.4958 12-32UNEF320.4720.7842A5.463545.311144.947924.869184.518662B4.6228 3A5.48645.3344.970784.909824.541523B4.6228 12-36UNS360.4210.7062A5.463545.323845.006344.930144.879342B4.7244 12-40UNS400.3780.6352A5.463545.3345.052064.97844.66092B4.8006 12-48UNS480.3150.5292A5.466085.351785.123185.057144.836162B4.9022 12-56UNS560.2710.4542A5.468625.364485.173985.110484.930142B5.0038 0.25“1/4-20UNC200.7561.271A6.322066.012185.496565.354324.810761B4.9784 6.352A6.322066.116325.496565.402584.810762B4.9784 3A6.356.144265.52455.453384.83873B4.9784 1/4-24UNS240.631.0582A6.322066.139185.633725.539745.062222B5.207 1/4-27UNS270.560.9412A6.32466.154425.712465.623565.204462B5.334 1/4-28UNF280.540.9071A6.32466.075685.735325.608325.242561B5.3594 2A6.32466.15955.735325.65155.242562B5.3594 3A6.356.18495.760725.697225.267963B5.3594 1/4-32UNEF320.4720.7842A6.32466.17225.808985.72775.379722B5.4864 3A6.355.68965.834385.773425.405123B5.4864 1/4-36UNS360.4210.7062A6.327146.187445.869945.79125.488942B5.588 1/4-40UNS400.3780.6352A6.327146.19765.915665.8425.570222B5.6642 1/4-48UNS480.3150.5292A6.329686.215385.986785.91825.697222B5.7658 1/4-56UNS560.2710.5452A6.329686.225546.035045.9695.79122B5.8674 0.3125“5/16-18UNC180.8411.4111A7.907027.574286.990086.835146.228081B6.4008 7.93752A7.907027.686046.990086.888486.228082B6.4008 3A7.93757.716527.020566.944366.258563B6.4008 5/16-20UN200.7561.272A7.907027.701287.081526.979926.395722B6.5532 3A7.93757.731767.1127.03586.42623B6.5532 5/16-24240.631.0581A79095.67.635247.221227.081526.649721B6.7818 2A7.909567.726687.221227.127246.649722B6.7818 3A7.93757.754627.249167.180586.677663B6.7818 5/8-27UNS270.560.9412A7.91217.741927.299967.211066.791962B6.9088 5/8-28UN280.540.9072A7.91217.7477.322827.236466.830062B6.9596 3A7.93757.77247.348227.282186.855463B6.9596 5/8-32UNEF320.4720.7842A7.91217.75977.31527.31526.967222B7.0866 3A7.93757.78517.360927.360926.992623B7.0866 5/8-36UNS360.4210.7062A7.914647.774947.457445.32137.07392B7.1628 5/8-40UNS400.3780.6352A7.914647.78517.503167.42957.157722B7.239 5/8-48UNS40.311780.3150.5292A7.917187.802887.574287.50577.287262B7.366 0.325“3/8-16UNC180.8411.4111A9.491989.13138.460748.295647.599681B7.7978 8.2552A9.491989.253228.460748.348987.599682B7.7978 3A9.5259.286248.493768.409947.63273B7.7978 3/8-18UNS180.8411.4112A9.491989.2718.575048.465827.813042B8.001 3/8-20UN200.7561.272A9.494529.288788.669028.564887.983222B8.1534 3A9.5259.319268.69958.620768.01373B8.1534 3/8-24UNF240.631.0581A9.497069.222748.808728.663948.237221B8.382 2A9.497069.314188.808728.71228.237222B8.382 3A9.5259.342128.836668.7638.265163B8.382 3/8-27UNS270.560.9412A9.497069.326888.884928.793488.376922B8.509 3/8-28UN280.540.9072A9.497069.331968.907788.816348.415022B8.5344 3A9.5259.35998.935728.867148.442963B8.5344 3/8-32UNEF320.4720.7842A8.569969.34728.983988.897628.554722B8.6614 3A9.5259.37269.009388.945888.580123B8.6614 3/8-36UNS360.4210.7062A9.49969.35999.04248.961128.658862B8.763 3/8-40UNC400.3780.6352A9.502149.37269.090669.011928.745222B8.8392 0.39“ 9.9060.390-27UNS270.560.9412A9.878069.707889.265929.174488.757922B8.89 0.4375“7/16-14UNC141.0811.8141A11.0769410.683249.898389.718048.917941B9.144 11.112A11.0769410.815329.898389.7798.917942B9.144 3A11.112510.850889.933949.845048.95353B9.144 7/16-16UNS160.861.5882A11.0769410.8381810.04579.928869.184642B9.398 3A11.0667810.8737410.081269.99499.22023B9.398 7/16-18UNS180.8411.4112A11.0794810.858510.1625410.053329.400542B9.5758 7/16-20UNF200.7561.271A11.0794810.769610.9397810.09659.568181B9.7282 2A11.0794810.8737410.9397810.14739.568182B9.7282 3A11.112510.9067610.312410.208269.60123B9.7282 7/16-24UNS240.631.0582A11.0845610.9016810.3962210.29979.824722B9.9568 7/16-27UNS270.560.9412A11.0845610.9143810.4724210.380989.964422B10.0838 7/16-28UNEF280.540.9072A11.0845610.9194610.4952810.4038410.002522B10.1346 3A11.112510.94748.67232210.4546410.030463B10.1346 7/16-32UN320.4720.7842A11.087110.934710.5714810.4851210.142222B10.2616 3A11.112510.960110.5968810.5333810.167623B10.2616 0.5“1/2-13UNC131.1631.9541A12.661912.2478811.391911.2039410.259061B10.5918 12.72A12.661912.3850411.391911.264910.335262B10.5918 3A12.712.4231411.4311.3360210.373363B10.5918 1/2-12UNS121.262.1172A12.6593612.369811.2852211.1480610.139682B10.414 3A12.712.4104411.3258611.2242610.180323B10.414 1/2-14UNS141.0811.8142A12.661912.4002811.4833411.3563410.50292B10.7442 1/2-16UNS160.861.5882A12.6644412.4256811.633211.5138210.772142B10.9728 3A13.20812.4612411.6687611.5798610.80773B10.9728 1/2-18UNS180.8411.4112A12.6669812.44611.7500411.6382810.988042B11.176 1/2-20UNF200.7561.271A12.6669812.357111.8414811.6789212.527281B11.3284 2A12.6669812.4612411.8414811.7322612.527282B11.3284 3A12.712.4942611.874511.7932211.191243B11.3284 1/2-24UNS240.631.0582A12.6695212.4866411.9811811.8821211.409682B11.557 1/2-27UNS270.560.9412A12.6720612.5018812.0599211.9659411.551922B11.684 1/2-28UNEF280.540.9072A12.6720612.5069612.0827811.988811.590022B11.7094 3A12.712.534912.1107212.039611.617963B11.7094 1/2-32UN320.4720.7842A12.674612.522212.1589812.0700811.729722B11.8364 3A12.712.547612.1843812.1183411.755123B11.8364 0.5625“9/16-12UNC121.262.1171A14.2468613.8099812.8727212.674611.727181B11.9888 14.2882A14.2468613.957312.8727212.7406411.727182B11.9888 3A14.287513.9979412.9133612.814311.767823B11.9888 9/16-14UNS141.0811.8142A14.249413.9877813.0708412.9438412.09042B12.319 9/16-16UN160.861.5882A14.2519414.0131813.220713.1013212.359642B12.573 3A14.287514.0487413.2562613.1673612.39523B12.573 9/16-18UNF180.8411.4111A14.2519413.919213.33513.1622812.5731B12.7508 2A14.25981414.0309613.33513.220712.5732B12.7508 3A14.287514.0665213.3705613.284212.608563B12.7508 9/16-20UN200.7561.272A14.2544814.0487413.4289813.322312.743182B12.9032 3A14.287514.0817613.46213.3807212.77623B12.9032 9/16-24UNEF240.631.0582A14.2570214.0741413.5686813.4696212.997182B13.1318 3A14.287514.1046213.5991613.525513.027663B13.1318 9/16-27UNS270.560.9412A14.2595614.0893813.6474213.5534413.139422B13.2588 9/16-28UN280.540.9072A14.2595614.0944613.6702813.576313.177522B13.3096 3A14.287514.122413.6982213.627113.205463B13.3096 9/16-32UN320.4720.7842A14.262114.109713.7464813.6575813.317222B13.4366 3A14.287514.135113.7718813.7058413.342623B13.4366 0.625“5/8-11UNC111.3752.3091A15.8343615.3720814.3357614.1249413.086081B13.3858 15.8752A15.8343615.5270214.3357614.1960613.086082B13.3858 3A15.87515.5676614.376414.2722613.126723B13.3858 5/8-12UN121.262.1172A15.8343615.544814.4602214.3230613.314682B13.589 3A15.87515.5854414.5008614.3967213.355323B13.589 5/8-14UNS141.0811.8142A15.836915.5752814.6583414.528813.67792B13.9192 5/8-16UN160.861.5882A15.8394415.6006814.808214.6862813.947142B14.1478 3A15.87515.6362414.8437614.7523213.98273B14.1478 5/8-18UNF180.8411.4111A15.8394415.506714.922514.744714.16051B14.351 2A15.8394415.6184614.922514.8031214.16052B14.351 3A15.87515.6032214.9580614.8691614.196063B14.351 5/8-16UN200.7561.272A15.8419815.6362415.0164814.9072614.330682B14.5034 3A15.87515.6692615.049514.9682214.36373B14.5034 5/8-24UNEF240.631.0582A15.8445215.6616415.1561815.0545814.584682B14.732 3A15.87515.6921215.1866615.1104614.615163B14.732 5/8-27UNS270.560.9412A15.8470615.6768815.2349215.138414.726922B14.859 5/8-28UN280.540.9072A15.8470615.6819615.2577815.1612614.765022B14.8844 3A15.87515.709915.2857215.214614.792963B14.8844 5/8-32UN320.4720.7842A15.8470615.6946615.3314415.2414.902182B15.0114 3A15.87515.722615.3593815.290814.930123B15.0114 0.6875“11/16-12UN121.262.1172A17.4218617.132316.0477215.9105614.902182B15.1638 17.4633A17.462517.1729416.0883615.9842214.942823B15.1638 11/16-16UN160.861.5882A17.4269417.1881816.395716.2737815.534642B15.748 3A17.462517.2237416.4312616.3398215.57023B15.748 11/16-20UN200.7561.272A17.4294817.2237416.6039816.4947615.918182B16.0782 3A17.462517.2567616.63716.5557215.95123B16.0782 11/16-24UNEF240.631.0582A17.4320217.2491416.7436816.6420816.172182B16.3068 3A9.842517.2796216.7741616.6979616.30683B16.3068 11/16-28UN280.540.9072A17.4345617.2694616.8452816.7487616.48462B16.4846 3A17.462517.297416.8732216.802116.48463B16.4846 11/16-32UN320.4720.7942A17.4345617.2821616.9189416.827516.489682B16.6116 3A17.462517.310116.9468816.878316.517623B16.6116 0.75“3/4-10UNC101.5132.541A19.0042818.5115217.3532817.1297615.979141B16.3068 19.052A19.0042818.6766217.3532817.2034215.979142B16.3068 3A19.0518.7223417.39917.2872416.024863B16.3068 3/4-12UN121.262.1172A19.0068218.7172617.6326817.4929816.487142B16.764 3A19.0518.7604417.6758617.5717216.530323B16.764 3/4-14UNS141.0811.8142A19.011918.7502817.8333417.703816.59892B17.0942 3/4-16UNF160.861.5881A19.011918.6512217.9806617.7901617.11961B17.3228 2A19.011918.7731417.9806617.8536617.11962B17.3228 3A19.0518.8112418.0187617.9222417.15773B17.3228 3/4-18UNS180.8411.4112A19.0144418.7934618.326117.9806617.33552B17.526 3/4-20UNEF200.7561.272A19.0169818.8112418.1914818.0797217.505682B17.6784 3A19.0518.8442618.224518.1406817.53873B17.6784 3/4-24UNEF240.631.0582A19.0195218.8366418.3311818.2270417.759682B17.907 3A19.0195218.8493418.4073818.3083217.899383B18.034 3/4-28UN280.540.9072A19.0195218.8544218.4302418.3337217.937482B18.0594 3A19.0518.884918.4607218.3870617.967963B18.0594 3/4-32UN320.4720.7842A19.0220618.8696618.5064418.41518.077182B18.1864 3A19.0518.897618.5343818.465818.105123B18.1864 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