美制标准系列统一螺纹的基本、公差和极限极限尺寸

1、第 1 页，共 54 页 美美制制标标准准系系列列统统一一螺螺纹纹的的基基本本、公公差差和和极极限限极极限限尺尺寸寸 inin公称直径基本大经D，d(in)牙数n系列代号基本中经 D2，d2内螺纹基本小径D1UNR外螺纹设计牙型小径d3(参考)公制对照表(mm)中经公差容隙 es外螺纹大经公差 基本大经D，d(内)小径D1(外)小径d3螺距P2A1A和2A1A00.060080UNF0.05190.04650.04471.52401.18031.13450.31750.0017620.00052910.073064UNC0.06290.05610.05381.85421.42461.42460

2、.39690.0019700.00059110.073072UNF0.06400.05800.05601.85421.47231.47230.35280.0018990.00057020.086056UNC0.07440.06670.06412.18441.69341.69340.45360.0021270.00063820.086064UNF0.07590.06910.06682.18441.75481.75480.39690.0020400.00061230.099048UNC0.08550.07640.07342.51461.94181.94180.52920.0023020.00069

3、130.099056UNF0.08740.07970.07712.51462.02362.02360.45360.0021910.00065740.112040UNC0.09580.08490.08132.84482.15742.15740.63500.0025070.00075240.112048UNF0.09850.08940.08642.84482.27202.27200.52920.0023610.00070850.125040UNC0.10880.09790.09433.17502.48762.48760.63500.0025620.00076950.125044UNF0.11020

4、.10040.09713.17502.55012.55010.57730.0024840.00074560.138032UNC0.11770.10420.09973.50522.64592.64590.79380.0028200.00084660.138040UNF0.12180.11090.10733.50522.81782.81780.63500.0026140.00078480.164032UNC0.14370.13020.12574.16563.30633.30630.79380.0029160.00087580.164036UNF0.14600.13390.12994.16563.4

5、0183.40180.70560.0028040.000841100.190024UNC0.16290.14490.13894.82603.68033.68031.05830.0033190.000996100.190032UNF0.16970.15620.15174.82603.96673.96670.79380.0030040.000901120.216024UNC0.18890.17090.16495.48644.34074.34071.05830.0034000.001020120.216028UNF0.19280.17730.17225.48644.50444.50440.90710

6、.0032240.000967120.216032UNEF0.19570.18220.17775.48644.62714.62710.79380.0031830.0009551/40.250020UNC0.21750.19590.18876.35004.97524.97521.27000.0037310.0011190.0122151/40.250028UNF0.22680.21130.20626.35005.36805.36800.90710.0033220.0009970.0097601/40.250032UNEF0.22970.21620.21176.35005.49075.49070.

7、79380.0032280.0009685/160.312518UNC0.27640.25240.24437.93756.40996.40991.41110.0040410.0012120.0131045/160.312520UN0.28000.25840.25127.93756.56276.56271.27000.0040600.001218第 2 页，共 54 页 美美制制标标准准系系列列统统一一螺螺纹纹的的基基本本、公公差差和和极极限限极极限限尺尺寸寸 inin公称直径基本大经D，d(in)牙数n系列代号基本中经 D2，d2内螺纹基本小径D1UNR外螺纹设计牙型小径d3(参考)公制对照表

8、(mm)中经公差容隙 es外螺纹大经公差 基本大经D，d(内)小径D1(外)小径d3螺距P2A1A和2A1A5/160.312524UNF0.28540.26740.26147.93756.79186.79181.05830.0036600.0010980.0108175/160.312528UN0.28930.27380.26877.93756.95556.95550.90710.0034950.0010495/160.312532UNEF0.29220.27870.27427.93757.07827.07820.79380.0033010.0009903/80.375016UNC0.334

9、40.30730.29839.52507.80657.80651.58750.0043630.0013090.0141743/80.375020UN0.34250.32090.31379.52508.15028.15021.27000.0041240.0012373/80.375024UNF0.34790.32990.32399.52508.37938.37931.05830.0038040.0011410.0108173/80.375028UN0.35180.33630.33129.52508.54308.54300.90710.0035590.0010683/80.375032UNEF0.

10、35470.34120.33679.52508.66578.66570.79380.0033650.0010107/160.437514UNC0.39110.36020.349911.11259.14859.14851.81430.0047130.0014140.0154947/160.437516UN0.39690.36980.360811.11259.39409.39401.58750.0046260.0013887/160.437520UNF0.40500.38340.376211.11259.73779.73771.27000.0041670.0012500.0122157/160.4

11、37528UNEF0.41430.39880.393711.112510.130510.13050.90710.0036160.0010857/160.437532UN0.41720.40370.399211.112510.253210.25320.79380.0034220.0010271/20.500013UNC0.45000.41670.405612.700010.584910.58491.95380.0049650.0014900.0162781/20.500016UN0.45940.43230.423312.700010.981510.98151.58750.0046780.0014

12、031/20.500020UNF0.46750.44590.438712.700011.325211.32521.27000.0042880.0012860.0122151/20.500028UNEF0.47680.46130.456212.700011.718011.71800.90710.0036680.0011001/20.500032UN0.47970.46620.461712.700011.840711.84070.79380.0034740.0010429/160.562512UNC0.50840.47230.460314.287511.996111.99612.11670.005

13、2250.0015680.0171719/160.562516UN0.52190.49480.485814.287512.569012.56901.58750.0047250.0014189/160.562518UNF0.52640.50240.494314.287512.759912.75991.41110.0045470.0013640.0131049/160.562520UN0.53000.50840.501214.287512.912712.91271.27000.0042800.0012849/160.562524UNEF0.53540.51740.511414.287513.141

14、813.14181.05830.0039600.0011889/160.562528UN0.53930.52380.518714.287513.305513.30550.90710.0037150.0011159/160.562532UN0.54220.52870.524214.287513.428213.42820.79380.0035210.001056第 3 页，共 54 页 美美制制标标准准系系列列统统一一螺螺纹纹的的基基本本、公公差差和和极极限限极极限限尺尺寸寸 inin公称直径基本大经D，d(in)牙数n系列代号基本中经 D2，d2内螺纹基本小径D1UNR外螺纹设计牙型小径d3(参

15、考)公制对照表(mm)中经公差容隙 es外螺纹大经公差 基本大经D，d(内)小径D1(外)小径d3螺距P2A1A和2A1A5/80.625011UNC0.56600.52660.513515.875013.375313.37532.30910.0055010.0016500.0181965/80.625012UN0.57090.53480.522815.875013.583613.58362.11670.0054430.0016335/80.625016UN0.58440.55730.548315.875014.156514.15651.58750.0047690.0014315/80.625

16、018UNF0.58890.56490.556815.875014.347414.34741.41110.0046520.0013960.0131045/80.625020UN0.59250.57090.563715.875014.500214.50021.27000.0043240.0012975/80.625024UNEF0.59790.57990.573915.875014.729314.72931.05830.0040040.0012015/80.625028UN0.60180.58630.581215.875014.893014.89300.90710.0037590.0011285

17、/80.625032UN0.60470.59120.586715.875015.015715.01570.79380.0035650.00107011/16 0.687512UN0.63340.59730.585317.462515.171115.17112.11670.0054850.00164611/16 0.687516UN0.64690.61980.610817.462515.744015.74401.58750.0048110.00144311/16 0.687520UN0.65500.63340.626217.462516.087716.08771.27000.0043660.00

18、131011/16 0.687524UNEF0.66040.64240.636417.462516.316816.31681.05830.0040460.00121411/16 0.687528UN0.66430.64880.643717.462516.480516.48050.90710.0038010.00114011/16 0.687532UN0.66720.65370.649217.462516.603216.60320.79380.0036070.0010823/40.750010UNC0.68500.64170.627319.050016.300416.30042.54000.00

19、58940.0017680.0193903/40.750012UN0.69590.65980.647819.050016.758616.75862.11670.0055240.0016573/40.750016UNF0.70940.68230.673319.050017.331517.33151.58750.0050240.0015070.0141743/40.750020UNEF0.71750.69590.688719.050017.675217.67521.27000.0044050.0013223/40.750028UN0.72680.71130.706219.050018.068018

20、.06800.90710.0038400.0011523/40.750032UN0.72970.71620.711719.050018.190718.19070.79380.0036460.00109413/16 0.812512UN0.75840.72230.710320.637518.346118.34612.11670.0055610.00166813/16 0.812516UN0.77190.74480.735820.637518.919018.91901.58750.0048870.00146613/16 0.812520UNEF0.78000.75840.751220.637519

21、.262719.26271.27000.0044420.00133313/16 0.812528UN0.78930.77380.768720.637519.655519.65550.90710.0038770.00116313/16 0.812532UN0.79220.77870.774220.637519.778219.77820.79380.0036830.001105第 4 页，共 54 页 美美制制标标准准系系列列统统一一螺螺纹纹的的基基本本、公公差差和和极极限限极极限限尺尺寸寸 inin公称直径基本大经D，d(in)牙数n系列代号基本中经 D2，d2内螺纹基本小径D1UNR外螺纹设计

22、牙型小径d3(参考)公制对照表(mm)中经公差容隙 es外螺纹大经公差 基本大经D，d(内)小径D1(外)小径d3螺距P2A1A和2A1A7/80.87509UNC0.80280.75470.738722.225019.169919.16992.82220.0063050.0018920.0208017/80.875012UN0.82090.78480.772822.225019.933619.93362.11670.0055960.0016797/80.875014UNF0.82860.79770.787422.225020.261020.26101.81430.0054200.001626

23、0.0154947/80.875016UN0.83440.80730.798322.225020.506520.50651.58750.0049220.0014777/80.875020UNEF0.84250.82090.813722.225020.850220.85021.27000.0044770.0013437/80.875028UN0.85180.83630.831222.225021.243021.24300.90710.0039120.0011747/80.875032UN0.85470.84120.836722.225021.365721.36570.79380.0037180.

24、00111515/16 0.937512UN0.88340.84730.835323.812521.521121.52112.11670.0056290.00168915/16 0.937516UN0.89690.86980.860823.812522.094022.09401.58750.0049550.00148715/16 0.937520UNEF0.90500.88340.876223.812522.437722.43771.27000.0045100.00135315/16 0.937528UN0.91430.89880.893723.812522.830522.83050.9071

25、0.0039450.00118415/16 0.937532UN0.91720.90370.899223.812522.953222.95320.79380.0037510.00112511.00008UNC0.91880.86470.846625.400021.963021.96303.17500.0067500.0020250.02250011.000012UNF0.94590.90980.897825.400023.108623.10862.11670.0058620.0017590.01717111.000016UN0.95940.93230.923325.400023.681523.

26、68151.58750.0049870.00149611.000020UNEF0.96750.94590.938725.400024.025224.02521.27000.0015420.00046311.000028UN0.97680.96130.956225.400024.418024.41800.90710.0039770.00119311.000032UN0.97970.96620.961725.400024.540724.54070.79380.0037830.00113511/161.06258UN0.98130.92720.909126.987523.550523.55053.1

27、7500.0068270.00204811/161.062512UN1.00840.97230.960326.987524.696124.69612.11670.0056920.00170811/161.062516UN1.02190.99480.985826.987525.269025.26901.58750.0050180.00150511/161.062518UNEF1.02641.00240.994326.987525.459925.45991.41110.0047760.00143311/161.062520UN1.03001.00841.001226.987525.612725.6

28、1271.27000.0045730.00137211/161.062528UN1.03931.02381.018726.987526.005526.00550.90710.0040080.00120211/81.12507UNC1.03220.97040.949728.575024.647024.64703.62860.0072500.0021750.024595第 5 页，共 54 页 美美制制标标准准系系列列统统一一螺螺纹纹的的基基本本、公公差差和和极极限限极极限限尺尺寸寸 inin公称直径基本大经D，d(in)牙数n系列代号基本中经 D2，d2内螺纹基本小径D1UNR外螺纹设计牙型小径

29、d3(参考)公制对照表(mm)中经公差容隙 es外螺纹大经公差 基本大经D，d(内)小径D1(外)小径d3螺距P2A1A和2A1A11/81.12508UN1.04380.98970.971628.575025.138025.13803.17500.0069010.00207011/81.125012UNF1.07091.03481.022828.575026.283626.28362.11670.0060130.0018040.01717111/81.125016UN1.08441.05731.048328.575026.856526.85651.58750.0050470.00151411

30、/81.125018UNEF1.08891.06491.056828.575027.047427.04741.41110.0048050.00144211/81.125020UN1.09251.07091.063728.575027.200227.20021.27000.0046020.00138111/81.125028UN1.10181.08631.081228.575027.593027.59300.90710.0040370.00121113/161.18758UN1.10631.05221.034130.162526.725526.72553.17500.0069730.002092

31、13/161.187512UN1.13341.09731.085330.162527.871127.87112.11670.0057490.00172513/161.187516UN1.14691.11981.110830.162528.444028.44401.58750.0050750.00152313/161.187518UNEF1.15141.12741.119330.162528.634928.63491.41110.0048330.00145013/161.187520UN1.15501.13341.126230.162528.787728.78771.27000.0046300.

32、00138913/161.187528UN1.16431.14881.143730.162529.180529.18050.90710.0040650.00122011/41.25007UNC1.15721.09541.074731.750027.822027.82203.62860.0073920.0022180.02459511/41.25008UN1.16881.11471.096631.750028.313028.31303.17500.0070430.00211311/41.250012UNF1.19591.15981.147831.750029.458629.45862.11670

33、.0061550.0018470.01717111/41.250016UN1.20941.18231.173331.750030.031530.03151.58750.0051030.00153111/41.250018UNEF1.21391.18991.181831.750030.222430.22241.41110.0048610.00145811/41.250020UN1.21751.19591.188731.750030.375230.37521.27000.0046580.00139711/41.250028UN1.22681.21131.206231.750030.768030.7

34、6800.90710.0040930.00122815/161.31258UN1.23131.17721.159133.337529.900529.90053.17500.0071100.00213315/161.312512UN1.25841.22231.210333.337531.046131.04612.11670.0058030.00174115/161.312516UN1.27191.24481.235833.337531.619031.61901.58750.0051290.00153915/161.312518UNEF1.27641.25241.244333.337531.809

35、931.80991.41110.0048870.00146615/161.312520UN1.28001.25841.251233.337531.962731.96271.27000.0046840.00140515/161.312528UN1.28931.27381.268733.337532.355532.35550.90710.0041190.001236第 6 页，共 54 页 美美制制标标准准系系列列统统一一螺螺纹纹的的基基本本、公公差差和和极极限限极极限限尺尺寸寸 inin公称直径基本大经D，d(in)牙数n系列代号基本中经 D2，d2内螺纹基本小径D1UNR外螺纹设计牙型小径d3

36、(参考)公制对照表(mm)中经公差容隙 es外螺纹大经公差 基本大经D，d(内)小径D1(外)小径d3螺距P2A1A和2A1A13/81.37506UNC1.26671.19461.170534.925030.342330.34234.23330.0079700.0023910.02725713/81.37508UN1.29381.23971.221634.925031.488031.48803.17500.0071770.00215313/81.375012UNF1.32091.28481.272834.925032.633632.63362.11670.0062890.0018870.01

37、717113/81.375016UN1.33441.30731.298334.925033.206533.20651.58750.0051550.00154713/81.375018UNEF1.33891.31491.306834.925033.397433.39741.41110.0049130.00147413/81.375020UN1.34251.32091.313734.925033.550233.55021.27000.0047100.00141313/81.375028UN1.35181.33631.331234.925033.943033.94300.90710.0041450.

38、00124417/161.43756UN1.32921.25711.233036.512531.929831.92984.23330.0080340.00241017/161.43758UN1.35631.30221.284136.512533.075533.07553.17500.0072410.00217217/161.437512UN1.38341.34731.335336.512534.221134.22112.11670.0058540.00175617/161.437516UN1.39691.36981.360836.512534.794034.79401.58750.005180

39、0.00155417/161.437518UNEF1.40141.37741.369336.512534.984934.98491.41110.0049380.00148117/161.437520UN1.40501.38341.376236.512535.137735.13771.27000.0047350.00142117/161.437528UN1.41431.39881.393736.512535.530535.53050.90710.0041700.00125111/21.50006UNC1.39171.31961.295538.100033.517333.51734.23330.0

40、080970.0024290.02725711/21.50008UN1.41881.36471.346638.100034.663034.66303.17500.0073040.00219111/21.500012UNF1.44591.40981.397838.100035.808635.80862.11670.0064160.0019250.01717111/21.500016UN1.45941.43231.423338.100036.381536.38151.58750.0052040.00156111/21.500018UNEF1.46391.43991.431838.100036.57

41、2436.57241.41110.0049620.00148911/21.500020UN1.46751.44591.438738.100036.725236.72521.27000.0047590.00142811/21.500028UN1.47681.46131.456238.100037.118037.11800.90710.0041940.00125819/161.56256UN1.45421.38211.358039.687535.104835.10484.23330.0081590.00244819/161.56258UN1.48131.42721.409139.687536.25

42、0536.25053.17500.0073660.00221019/161.562512UN1.50841.47231.460339.687537.396137.39612.11670.0059020.00177119/161.562516UN1.52191.49481.485839.687537.969037.96901.58750.0052280.001568第 7 页，共 54 页 美美制制标标准准系系列列统统一一螺螺纹纹的的基基本本、公公差差和和极极限限极极限限尺尺寸寸 inin公称直径基本大经D，d(in)牙数n系列代号基本中经 D2，d2内螺纹基本小径D1UNR外螺纹设计牙型小径d

43、3(参考)公制对照表(mm)中经公差容隙 es外螺纹大经公差 基本大经D，d(内)小径D1(外)小径d3螺距P2A1A和2A1A19/161.562518UNEF1.52641.50241.494339.687538.159938.15991.41110.0049860.00149619/161.562520UN1.53001.50841.501239.687538.312738.31271.27000.0047830.00143515/81.62506UN1.51671.44461.420541.275036.692336.69234.23330.0082190.00246615/81.62

44、508UN1.54381.48971.471641.275037.838037.83803.17500.0074260.00222815/81.625012UN1.57091.53481.522841.275038.983638.98362.11670.0059250.00177815/81.625016UN1.58441.55731.548341.275039.556539.55651.58750.0052510.00157515/81.625018UNEF1.58891.56491.556841.275039.747439.74741.41110.0050090.00150315/81.6

45、25020UN1.59251.57091.563741.275039.900239.90021.27000.0048060.001442111/161.68756UN1.57921.50711.483042.862538.279838.27984.23330.0082780.002483111/161.68758UN1.60631.55221.534142.862539.425539.42553.17500.0074850.002246111/161.687512UN1.63341.59731.585342.862540.571140.57112.11670.0059470.001784111

46、/161.687516UN1.64691.61981.610842.862541.144041.14401.58750.0052730.001582111/161.687518UNEF1.65141.62741.619342.862541.334941.33491.41110.0050310.001509111/161.687520UN1.65501.63341.626242.862541.487741.48771.27000.0048280.00144813/41.75005UNC1.62011.53351.504644.450038.950738.95075.08000.0089220.0

47、026770.03078013/41.75006UN1.64171.56961.545544.450039.867339.86734.23330.0083350.00250113/41.75008UN1.66881.61471.596644.450041.013041.01303.17500.0075420.00226313/41.750012UN1.69591.65981.647844.450042.158642.15862.11670.0059690.00179113/41.750016UN1.70941.68231.673344.450042.731542.73151.58750.005

48、2950.00158913/41.750020UN1.71751.69591.688744.450043.075243.07521.27000.0048500.001455113/161.81256UN1.70421.63211.608046.037541.454841.45484.23330.0083910.002517113/161.81258UN1.73131.67721.659146.037542.600542.60053.17500.0075980.002279113/161.812512UN1.75841.72231.710346.037543.746143.74612.11670

49、.0059900.001797113/161.812516UN1.77191.74481.735846.037544.319044.31901.58750.0053160.001595113/161.812520UN1.78001.75841.751246.037544.662744.66271.27000.0048710.001461第 8 页，共 54 页 美美制制标标准准系系列列统统一一螺螺纹纹的的基基本本、公公差差和和极极限限极极限限尺尺寸寸 inin公称直径基本大经D，d(in)牙数n系列代号基本中经 D2，d2内螺纹基本小径D1UNR外螺纹设计牙型小径d3(参考)公制对照表(mm)

50、中经公差容隙 es外螺纹大经公差 基本大经D，d(内)小径D1(外)小径d3螺距P2A1A和2A1A17/81.87506UN1.76671.69461.670547.625043.042343.04234.23330.0084470.00253417/81.87508UN1.79381.73971.721647.625044.188044.18803.17500.0076540.00229617/81.875012UN1.82091.78481.772847.625045.333645.33362.11670.0060110.00180317/81.875016UN1.83441.80731

51、.798347.625045.906545.90651.58750.0053370.00160117/81.875020UN1.84251.82091.813747.625046.250246.25021.27000.0048920.001468115/161.93756UN1.82921.75711.733049.212544.629844.62984.23330.0085010.002550115/161.93758UN1.85631.80221.784149.212545.775545.77553.17500.0077080.002312115/161.937512UN1.88341.8

52、4731.835349.212546.921146.92112.11670.0060310.001809115/161.937516UN1.89691.86981.860849.212547.494047.49401.58750.0053570.001607115/161.937520UN1.90501.88341.876249.212547.837747.83771.27000.0049120.00147422.00004.5UNC1.85571.75941.727450.800044.689744.68975.64440.0095140.0028540.03301922.00006UN1.

53、89171.81961.795550.800046.217346.21734.23330.0085540.00256622.00008UN1.91881.86471.846650.800047.363047.36303.17500.0077610.00232822.000012UN1.94591.90981.897850.800048.508648.50862.11670.0060510.00181522.000016UN1.95941.93231.923350.800049.081549.08151.58750.0053770.00161322.000020UN1.96751.94591.9

54、38750.800049.425249.42521.27000.0049320.00148021/82.12506UN2.01671.94461.920553.975049.392349.39234.23330.0086580.00259721/82.12508UN2.04381.98971.971653.975050.538050.53803.17500.0078650.00236021/82.125012UN2.07092.03482.022853.975051.683651.68362.11670.0060890.00182721/82.125016UN2.08442.05732.048

55、353.975052.256552.25651.58750.0054150.00162521/82.125020UN2.09252.07092.063753.975052.600252.60021.27000.0049700.00149121/42.25004.5UNC2.10572.00941.977457.150051.039751.03975.64440.0097190.0029160.03301921/42.25006UN2.14172.06962.045557.150052.567352.56734.23330.0087590.00262821/42.25008UN2.16882.1

56、1472.096657.150053.713053.71303.17500.0079660.00239021/42.250012UN2.19592.15982.147857.150054.858654.85862.11670.0061270.001838第 9 页，共 54 页 美美制制标标准准系系列列统统一一螺螺纹纹的的基基本本、公公差差和和极极限限极极限限尺尺寸寸 inin公称直径基本大经D，d(in)牙数n系列代号基本中经 D2，d2内螺纹基本小径D1UNR外螺纹设计牙型小径d3(参考)公制对照表(mm)中经公差容隙 es外螺纹大经公差 基本大经D，d(内)小径D1(外)小径d3螺距P2

57、A1A和2A1A21/42.250016UN2.20942.18232.173357.150055.431555.43151.58750.0054530.00163621/42.250020UN2.21752.19592.188757.150055.775255.77521.27000.0050080.00150223/82.37506UN2.26672.19462.170560.325055.742355.74234.23330.0088560.00265723/82.37508UN2.29382.23972.221660.325056.888056.88803.17500.0080630.

58、00241923/82.375012UN2.32092.28482.272860.325058.033658.03362.11670.0061620.00184923/82.375016UN2.33442.30732.298360.325058.606558.60651.58750.0054880.00164623/82.375020UN2.34252.32092.313760.325058.950258.95021.27000.0050430.00151321/22.50004UNC2.33762.22942.193363.500056.625956.62596.35000.0103610.

59、0031080.03571721/22.50006UN2.39172.31962.295563.500058.917358.91734.23330.0089510.00268521/22.50008UN2.41882.36472.346663.500060.063060.06303.17500.0081580.00244721/22.500012UN2.44592.40982.397863.500061.208661.20862.11670.0061970.00185921/22.500016UN2.45942.43232.423363.500061.781561.78151.58750.00

60、55230.00165721/22.500020UN2.46752.44592.438763.500062.125262.12521.27000.0050780.00152325/82.62504UN2.46262.35442.318366.675059.800959.80096.350025/82.62506UN2.51672.44462.420566.675062.092362.09234.23330.0090420.00271325/82.62508UN2.54382.48972.471666.675063.238063.23803.17500.0082490.00247525/82.6