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1、美制螺纹尺寸表 单位：mm 外螺纹内螺纹 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小径螺纹中径螺纹外径钻孔 直径规格数高距代号MaxMinMaxMinMax代号MinMaxMinMaxMin直径 0.073（#1）1-64UNC640.2360.3972A1.838961.742441.582421.531621.366522B1.424941.582421.597661.66371.85421.397 1.8543A1.85421.757681.597661.559561.381763B1.424941.582421.597661.645921.85421.397 1-72UNF
2、720.210.3532A1.838961.750061.610361.56211.419862B1.47321.61291.62561.68911.85421.5113 3A1.85421.76531.62561.590041.43513B1.47321.61291.62561.673861.85421.5113 0.086(#2)2-56UNC560.2710.4542A2.169162.065021.874521.821181.630682B1.694181.871981.889761.960882.18441.7018 2.1843A2.18442.080261.889761.8491
3、21.645923B1.694181.871981.889761.94312.18441.7018 2-64UNF640.2360.3972A2.169162.072641.912621.861821.696722B1.755141.912621.927861.996442.18441.778 3A2.18442.087881.927861.889761.711963B1.755141.912621.927861.978662.18441.778 0.099(3#)3-48UNC480.3150.5292A2.496822.382522.153922.09551.864362B1.940562
4、.14632.17172.24792.51461.9939 2.5153A2.51462.40032.17172.128521.882143B1.940562.14632.17172.227582.51461.9939 3-56UNF560.2710.4542A2.496822.392682.202182.14631.958342B2.024382.19712.219962.291082.51462.0574 3A2.51462.410462.219962.179321.976123B2.024382.19712.219962.27332.51462.0574 0.112(#4)4-40UNC
5、400.3780.6352A2.824482.694942.4132.34952.067562B2.156462.385062.433322.517142.84482.1844 2.8453A2.84482.715262.433322.385062.087883B2.156462.385062.433322.494282.84482.1844 4-48UNF480.3150.5292A2.827022.712722.484122.423162.194562B2.270762.458722.50192.580642.84482.2606 3A2.84482.73052.50192.456182.
6、212343B2.270762.458722.50192.560322.84482.2606 0.125(#5)5-40UNC400.3780.6352A3.154683.025142.74322.677162.397762B2.486662.697482.763522.847343.1752.5273 3.1753A3.1753.045462.763522.715262.418083B2.486662.697482.763522.827023.1752.5273 5-44UNF440.3440.5772A3.157223.03532.78132.71782.468882B2.550162.7
7、40662.799082.880363.1752.5781 3A3.1753.053082.799082.750822.486663B2.550162.740662.545082.860043.1752.5781 0.138(#6 ）6-32UNC320.4720.7942A3.484883.332482.969262.898142.542B2.64162.89562.989583.083563.50522.7051 3.5053A3.50523.35282.989582.936242.560323B2.64162.89562.989583.058163.50522.7051 6-40UNF4
8、00.3780.6352A3.484883.355343.07343.007362.727962B2.81943.02263.093723.180083.50522.8702 3A3.50523.375663.093723.042922.748283B2.81943.012443.093723.157223.50522.8702 0.164（#8）8-32UNC320.4720.7842A4.142743.990343.627123.553463.197862B3.3023.53063.649983.74654.16563.4544 4.1663A4.16564.01323.649983.59
9、413.220723B3.3023.528063.649983.72114.16563.4544 8-36UNF360.4210.7062A4.145284.005583.688083.616963.304542B3.40363.60683.70843.799844.16563.4544 3A4.16564.02593.70843.655063.324863B3.40363.596643.70843.776984.16563.4544 0.19（#10）10-24UNC240.631.0582A4.80064.617724.112264.028443.540762B3.6833.96244.1
10、37664.246884.8263.7338 4.8263A4.8264.643124.137664.074163.566163B3.6833.94974.137664.218944.8263.7338 10-28UNS280.540.9072A4.80064.63554.211324.12753.718562B3.83544.0644.236724.345944.8263.8608 10-32UNF320.4720.7842A4.803144.650744.287524.211323.858262B3.96244.16564.310384.409444.8263.9878 3A4.8264.
11、67364.310384.251963.881123B3.96244.168144.310384.384044.8263.9878 10-36UNS360.4210.7062A4.803144.663444.345944.269743.96242B4.0644.21644.36884.467864.8264.0386 10-40UNS400.3780.6352A4.803144.67364.391664.3184.043682B4.14024.29264.414524.50854.8264.0894 10-48UNS480.3150.5292A4.805684.691384.462784.39
12、6744.175762B4.24184.36884.48314.569464.8264.2164 10-56UNS560.2710.4542A4.808224.704084.513584.450084.269742B4.34344.4454.531364.612644.8264.3053 0.216（#12）12-24UNC240.631.0582A5.4615.278124.772664.68634.201162B4.34344.59744.798064.909825.48644.4958 0.4863A5.48645.303524.798064.732024.226563B4.34344.
13、589784.798064.881885.48644.4958 12-28UNF280.540.9072A5.4615.29594.871724.790444.378962B4.49584.72444.897125.00385.48644.572 3A5.48645.32134.897124.836164.404363B4.49584.716784.897124.975865.48644.572 12-32UNEF320.4720.7842A5.463545.311144.947924.869184.518662B4.62284.8264.970785.074925.48644.572 3A5
14、.48645.3344.970784.909824.541523B4.62284.81334.970785.049525.48644.572 12-36UNS360.4210.7062A5.463545.323845.006344.930144.879342B4.72444.87685.02925.128265.48644.8006 12-40UNS400.3780.6352A5.463545.3345.052064.97844.66092B4.80064.9535.074925.16895.48644.8514 12-48UNS480.3150.5292A5.466085.351785.12
15、3185.057144.836162B4.90225.02925.14355.229865.48644.9784 12-56UNS560.2710.4542A5.468625.364485.173985.110484.930142B5.00385.10545.191765.273045.48644.9784 0.25“1/4-20UNC200.7561.271A6.322066.012185.496565.354324.810761B4.97845.25785.52455.709926.355.1054 6.352A6.322066.116325.496565.402584.810762B4.
16、97845.25785.52455.648966.355.1054 3A6.356.144265.52455.453384.83873B4.97845.250185.52455.615946.355.1054 1/4-24UNS240.631.0582A6.322066.139185.633725.539745.062222B5.2075.4615.661665.783586.355.3086 1/4-27UNS270.560.9412A6.32466.154425.712465.623565.204462B5.3345.56265.737865.852166.355.4102 1/4-28U
17、NF280.540.9071A6.32466.075685.735325.608325.242561B5.35945.5885.760725.925826.355.4102 2A6.32466.15955.735325.65155.242562B5.35945.5886.827525.869946.355.4102 3A6.356.18495.760725.697225.267963B5.35945.56266.827525.8426.355.4102 1/4-32UNEF320.4720.7842A6.32466.17225.808985.72775.379722B5.48645.68965
18、.834385.941066.355.55498 3A6.355.68965.834385.773425.405123B5.48645.661665.834385.913126.355.55498 1/4-36UNS360.4210.7062A6.327146.187445.869945.79125.488942B5.5885.74045.89285.99446.355.6134 1/4-40UNS400.3780.6352A6.327146.19765.915665.8425.570222B5.66425.81665.938526.035046.355.7912 1/4-48UNS480.3
19、150.5292A6.329686.215385.986785.91825.697222B5.76585.89286.00716.098546.355.7912 1/4-56UNS560.2710.5452A6.329686.225546.035045.9695.79122B5.86745.9696.055366.139186.355.9436 0.3125“5/16-18UNC180.8411.4111A7.907027.574286.990086.835146.228081B6.40086.7317.020567.221227.93756.5278 7.93752A7.907027.686
20、046.990086.888486.228082B6.40086.7317.020567.155187.93756.5278 3A7.93757.716527.020566.944366.258563B6.40086.68027.020567.119627.93756.5278 5/16-20UN200.7561.272A7.907027.701287.081526.979926.395722B6.55326.8587.1127.244087.93756.74624 3A7.93757.731767.1127.03586.42623B6.55326.80727.1127.211067.9375
21、6.74624 5/16-24240.631.0581A79095.67.635247.221227.081526.649721B6.78187.03587.249167.42957.93756.9088 2A7.909567.726687.221227.127246.649722B6.78187.03587.249167.371087.93756.9088 3A7.93757.754627.249167.180586.677663B6.78186.995167.249167.34067.93756.9088 5/8-27UNS270.560.9412A7.91217.741927.29996
22、7.211066.791962B6.90887.13747.249167.439667.93757.0358 5/8-28UN280.540.9072A7.91217.7477.322827.236466.830062B6.95967.16287.348227.459987.93757.0358 3A7.93757.77247.348227.282186.855463B6.95967.129787.348227.432047.93757.0358 5/8-32UNEF320.4720.7842A7.91217.75977.31527.31526.967222B7.08667.26447.421
23、887.528567.93757.14248 3A7.93757.78517.360927.360926.992623B7.08667.231387.421887.500627.93757.14248 5/8-36UNS360.4210.7062A7.914647.774947.457445.32137.07392B7.16287.34067.48037.58197.93757.14248 5/8-40UNS400.3780.6352A7.914647.78517.503167.42957.157722B7.2397.39147.526027.622547.93757.366 5/8-48UN
24、S40.3120.3150.5292A7.917187.802887.574287.50577.287262B7.3667.4937.59467.686047.93757.366 0.325“3/8-16UNC180.8411.4111A9.491989.13138.460748.295647.599681B7.79788.15348.493768.709669.5257.9375 8.2552A9.491989.253228.460748.348987.599682B7.79788.15348.493768.638549.5257.9375 3A9.5259.286248.493768.40
25、9947.63273B7.79788.082288.493768.602989.5257.9375 3/8-18UNS180.8411.4112A9.491989.2718.575048.465827.813042B8.0018.33128.608068.75039.5258.0264 3/8-20UN200.7561.272A9.494529.288788.669028.564887.983222B8.15348.43288.69958.836669.5258.33374 3A9.5259.319268.69958.620768.01373B8.15348.374388.69958.6995
26、9.5258.33374 3/8-24UNF240.631.0581A9.497069.222748.808728.663948.237221B8.3828.6368.836668.836669.5258.4328 2A9.497069.314188.808728.71228.237222B8.3828.6368.836668.961129.5258.4328 3A9.5259.342128.836668.7638.265163B8.3829.44888.836668.513069.5258.4328 3/8-27UNS270.560.9412A9.497069.326888.884928.7
27、93488.376922B8.5098.73768.912869.032249.5258.6106 3/8-28UN280.540.9072A9.497069.331968.907788.816348.415022B8.53448.7638.935729.052569.5258.6106 3A9.5259.35998.935728.867148.442963B8.53448.702048.935729.024629.5258.6106 3/8-32UNEF320.4720.7842A8.569969.34728.983988.897628.554722B8.66148.86469.009389
28、.121149.5258.8392 3A9.5259.37269.009388.945888.580123B8.66148.811269.009389.09329.5258.8392 3/8-36UNS360.4210.7062A9.49969.35999.04248.961128.658862B8.7638.94089.06789.174489.5258.8392 3/8-40UNC400.3780.6352A9.502149.37269.090669.011928.745222B8.83928.99169.113529.215129.5258.8392 0.39“ 9.906 0.390-
29、27UNS270.560.9412A9.878069.707889.265929.174488.757922B8.899.11869.293869.413249.9068.8392 0.4375“7/16-14UNC141.0811.8141A11.076910.68329.898389.718048.917941B9.1449.55049.9339410.167611.11259.3472 11.112A11.076910.81539.898389.7798.917942B9.1449.55049.9339410.088911.11259.3472 3A11.112510.85099.933
30、949.845048.95353B9.1449.441189.9339410.050811.11259.3472 7/16-16UNS160.861.5882A11.076910.838210.04579.928869.184642B9.3989.753610.081310.231111.11259.5758 3A11.066810.873710.08139.99499.22023B9.3989.65210.081310.195611.11259.5758 7/16-18UNS180.8411.4112A11.079510.858510.162510.05339.400542B9.57589.
31、90610.195610.337811.11259.8044 7/16-20UNF200.7561.271A11.079510.769610.939810.09659.568181B9.728210.03310.28710.492711.06689.92124 2A11.079510.873710.939810.14739.568182B9.728210.03310.28710.424211.06689.92124 3A11.112510.906810.312410.20839.60123B9.72829.9466410.28710.391111.06689.92124 7/16-24UNS2
32、40.631.0582A11.084610.901710.396210.29979.824722B9.956810.210810.424210.548611.066810.0838 7/16-27UNS270.560.9412A11.084610.914410.472410.3819.964422B10.083810.312410.500410.619711.112510.2616 7/16-28UNEF280.540.9072A11.084610.919510.495310.403810.00252B10.134610.337810.523210.640111.112510.2616 3A1
33、1.112510.94748.6723210.454610.03053B10.134611.457910.523210.612111.112510.2616 7/16-32UN320.4720.7842A11.087110.934710.571510.485110.14222B10.261610.439410.596910.708611.112510.2616 3A11.112510.960110.596910.533410.16763B10.261610.398810.596910.680711.112510.2616 0.5“1/2-13UNC131.1631.9541A12.661912
34、.247911.391911.203910.25911B10.591811.023611.4311.676412.710.7163 12.72A12.661912.38511.391911.264910.33532B10.591811.023611.4311.595112.710.7163 3A12.712.423111.4311.33610.37343B10.591810.881411.4311.551912.710.7163 1/2-12UNS121.262.1172A12.659412.369811.285211.148110.13972B10.41410.871211.325911.5
35、03712.710.7163 3A12.712.410411.325911.224310.18033B10.41410.726411.325911.457912.710.7163 1/2-14UNS141.0811.8142A12.661912.400311.483311.356310.50292B10.744211.125211.521411.686512.710.7163 1/2-16UNS160.861.5882A12.664412.425711.633211.513810.77212B10.972811.328411.668811.823712.711.1125 3A13.20812.
36、461211.668811.579910.80773B10.972811.224311.668811.785612.711.1125 1/2-18UNS180.8411.4112A12.66712.44611.7511.638310.9882B11.17611.506211.783111.930412.711.1125 1/2-20UNF200.7561.271A12.66712.357111.841511.678912.52731B11.328411.607811.874512.087912.711.5087 2A12.66712.461211.841511.732312.52732B11.
37、328411.607811.874512.016712.711.5087 3A12.712.494311.874511.793211.19123B11.328411.52411.874511.981212.711.5087 1/2-24UNS240.631.0582A12.669512.486611.981211.882111.40972B11.55711.81112.011712.141212.711.5087 1/2-27UNS270.560.9412A12.672112.501912.059911.965911.55192B11.68411.912612.087912.209812.71
38、1.905 1/2-28UNEF280.540.9072A12.672112.50712.082811.988811.592B11.709411.93811.93812.232612.711.905 3A12.712.534912.110712.039611.6183B11.709411.87712.110712.202212.711.905 1/2-32UN320.4720.7842A12.674612.522212.15912.070111.72972B11.836412.039612.184412.298712.711.905 3A12.712.547612.184412.118311.
39、75513B11.836411.986312.184412.270712.711.905 0.5625“9/16-12UNC121.262.1171A14.246913.8112.872712.674611.72721B11.988812.44612.913413.172414.287512.3038 14.2882A14.246913.957312.872712.740611.72722B11.988812.44612.913414.008614.287512.3038 3A14.287513.997912.913412.814311.76783B11.988812.301212.91341
40、3.045414.287512.3038 9/16-14UNS141.0811.8142A14.249413.987813.070812.943812.09042B12.31912.725413.108913.27414.287512.3038 9/16-16UN160.861.5882A14.251914.013213.220713.101312.35962B12.57312.928613.256313.411214.287512.7 3A14.287514.048713.256313.167412.39523B12.57312.801613.256313.373114.287512.7 9
41、/16-18UNF180.8411.4111A14.251913.919213.33513.162312.5731B12.750813.08113.370613.596614.287513.0962 2A14.259814.03113.33513.220712.5732B12.750813.08113.370613.520414.287513.0962 3A14.287514.066513.370613.284212.60863B12.750812.969213.370613.482314.287513.0962 9/16-20UN200.7561.272A14.254514.048713.4
42、2913.322312.74322B12.903213.20813.46213.601714.287513.0962 3A14.287514.081813.46213.380712.77623B12.903213.111513.46213.566114.287513.0962 9/16-24UNEF240.631.0582A14.25714.074113.568713.469612.99722B13.131813.385813.599213.728714.287513.0962 3A14.287514.104613.599213.525513.02773B13.131813.319813.59
43、9213.695714.287513.0962 9/16-27UNS270.560.9412A14.259614.089413.647413.553413.13942B13.258813.487413.675413.797314.287513.4925 9/16-28UN280.540.9072A14.259614.094513.670313.576313.17752B13.309613.512813.698213.820114.287513.4925 3A14.287514.122413.698213.627113.20553B13.309613.464513.698213.789714.2
44、87513.4925 9/16-32UN320.4720.7842A14.262114.109713.746513.657613.31722B13.436613.614413.771913.886214.287513.4925 3A14.287514.135113.771913.705813.34263B13.436613.573813.771913.858214.287513.4925 0.625“5/8-11UNC111.3752.3091A15.834415.372114.335814.124913.08611B13.385813.868414.376414.648215.87513.4
45、925 15.8752A15.834415.52714.335814.196113.08612B13.385813.868414.376414.559315.87513.4925 3A15.87515.567714.376414.272313.12673B13.385813.693114.376414.513615.87513.4925 5/8-12UN121.262.1172A15.834415.544814.460214.323113.31472B13.58914.046214.500914.681215.87513.8913 3A15.87515.585414.500914.396713
46、.35533B13.58913.87614.500914.635515.87513.8913 5/8-14UNS141.0811.8142A15.836915.575314.658314.528813.67792B13.919214.325614.696414.864615.87513.8913 5/8-16UN160.861.5882A15.839415.600714.808214.686313.94712B14.147814.503414.843815.001215.87514.2875 3A15.87515.636214.843814.752313.98273B14.147814.381
47、514.843814.960615.87514.2875 5/8-18UNF180.8411.4111A15.839415.506714.922514.744714.16051B14.35114.681214.958115.189215.87514.6837 2A15.839415.618514.922514.803114.16052B14.35114.681214.958115.110515.87514.6837 3A15.87515.603214.958114.869214.19613B14.35114.554214.958115.072415.87514.6837 5/8-16UN200
48、.7561.272A15.84215.636215.016514.907314.33072B14.503414.782815.049515.191715.87514.6837 3A15.87515.669315.049514.968214.36373B14.503414.69915.049515.156215.87514.6837 5/8-24UNEF240.631.0582A15.844515.661615.156215.054614.58472B14.73214.98615.186715.318715.87514.6837 3A15.87515.692115.186715.110514.6
49、1523B14.73214.907315.186715.285715.87514.6837 5/8-27UNS270.560.9412A15.847115.676915.234915.138414.72692B14.85915.087615.262915.389915.87515.08 5/8-28UN280.540.9072A15.847115.68215.257815.161314.7652B14.884415.11315.285715.410215.87515.08 3A15.87515.709915.285715.214614.7933B14.884415.05215.285715.379715.87515.08 5/8-32UN320.4720.7842A15.847115.694715.331415.2414.90222B15.011415.214615.359415.476215.87515.08 3A15.87515.722615.359415.290814.93013B15.011415.161315.359415.448315.87515.08 0.6875“11/16-12UN121.262.1172A17.421917.132316.047715.910614.90222B15.163815.62116.088416.268717.462515.4762