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美制螺纹详细参数

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External Thread /Internal Thread

Nominal Size,TPI, Series

Ext.5

/8-11 UNCInt.Ext.5/8-11 UNCInt.Ext.5/8-11 UNCInt.Ext.5/8-12 UNInt.Ext.5

/8-12 UN

Int.Ext.5

/8-14 UNSInt.Ext.5

/8-16 UNInt.Ext.5

/8-16 UN

Int.Ext.5/8-18 UNFInt.Ext.5/8-18 UNFInt.Ext.5/8-18 UNFInt.Ext.5/8-20 UNInt.Ext.5

/8-20 UN

Int.Ext.5/8-24 UNEFInt.Ext.5/8-24 UNEFInt.Ext.5/8-27 UNSInt.Ext.5

/8-28 UNInt.Ext.5/8-28 UNInt.Ext.5

/8-32 UNInt.Ext.5/8-32 UNInt.Ext.11

/16-12 UN

Int.

Allowan

Class

ce1A0.0016

1B2A0.00162B3A03B2A0.00162B3A03B2A0.00152B2A0.00142B3A03B1A0.00141B2A0.00142B3A03B2A0.00132B3A03B2A0.00122B3A03B2A0.00112B2A0.00112B3A03B2A0.00112B3A03B2A0.0016

2BMaxMajorMaxMinor0.62340.546

0.62340.5460.6250.53910.62340.5530.6250.54630.62350.50.62360.5710.6250.56620.62360.5780.62360.5780.6250.5730.62370.5820.6250.57870.62380.590.6250.58690.62390.5940.62390.5950.6250.59260.62390.5990.6250.59690.68590.615

MinMajorMinMinor0.60520.5270.61130.5270.61290.5270.6120.5350.61360.5350.61320.5480.61420.5570.61560.5570.61050.5650.61490.5650.61630.5650.61560.5710.61690.5710.61660.580.61780.580.61720.5850.61740.5860.61850.5860.61790.5910.6190.5910.67450.597

MaxaMin bPitch-

0.50.5770.6052

0.50.573-0.5660.571-0.5690.578-0.5710.576-0.5770.585-0.5830.591-0.5840.5-0.5880.598-0.5880.595-0.50.593-0.5910.598-0.5930.597-0.5970.603-0.5980.602-0.60.606-0.6010.607-0.6020.606-0.6040.609-0.6050.608-0.6320.1

MinPitch0.55610.5660.550.5660.56190.5660.56390.57090.56680.57090.5720.57860.57820.58440.58080.58440.58050.580.58280.580.58540.580.58690.59250.530.59250.59270.59790.59490.59790.5960.60090.59690.60180.5990.60180.60.60470.6020.60470.620.6334

UNRcMinorDiaMajorDia(Min0.51520.6250.51520.6250.51680.6250.52420.6250.52580.6250.53850.6250.54910.6250.55050.6250.55750.6250.55750.6250.550.6250.520.6250.56550.6250.57420.6250.57540.6250.57980.6250.58130.6250.58240.6250.58670.6250.58780.6250.58670.6875

Ext.11

/16-12 UNInt.Ext.11

/16-16 UNInt.Ext.11

/16-20 UNInt.Ext.11

/16-20 UN

Int.Ext.11

/16-24 UNEFInt.Ext.11

/16-28 UNInt.Ext.11

/16-32 UNInt.Ext.11

/16-32 UN

Int.Ext.3

/4-10 UNCInt.Ext.3

/4-12 UNInt.Ext.3

/4-12 UN

Int.Ext.3

/4-14 UNSInt.Ext.3

/4-16 UNFInt.Ext.3

/4-16 UNF

Int.Ext.3

/4-18 UNS

Int.Ext.3

/4-20 UNEFInt.Ext.3

/4-20 UNEFInt.Ext.

/4-24 UNS

3A03B2A0.00142B3A03B2A0.00132B3A03B2A0.00122B3A03B2A0.00112B3A03B2A0.00112B3A03B1A0.00181B2A0.00182B3A03B2A0.00172B3A03B2A0.00152B1A0.00151B2A0.00152B3A03B2A0.00142B2A0.00132B3A03B2A0.0012

0.68750.60850.68610.6340.68750.62840.68620.50.68750.120.68630.6520.68750.940.680.6570.68750.65510.680.6610.68750.65940.74820.6630.74820.6630.750.65450.74830.6780.750.67070.74850.6880.74850.6960.74850.6960.750.69080.74860.7030.74870.7070.750.70370.7488

0.67610.5970.67670.620.67810.620.67810.6330.67940.6330.67910.20.68030.20.67990.90.6810.90.68040.6540.68150.6540.72880.20.73530.20.73710.20.73690.660.73860.660.73820.6730.73430.6820.73910.6820.74060.6820.73990.690.74060.6960.74190.6960.7416

------------0.7288

-----------

0.6330.62930.6390.63340.60.070.6530.690.70.330.6520.690.6540.940.6610.6550.6550.65180.6590.6550.6590.65520.6660.66040.660.65740.60.66040.6630.65940.6690.630.60.66150.6680.630.6660.66250.6720.66720.6670.650.6710.66720.6830.67440.6970.6850.6830.67730.6930.6850.6850.68060.6910.6850.6940.68870.7030.69590.6960.69180.710.69590.7020.6970.710.70360.7080.70040.7190.70940.7080.70290.7160.70940.7090.70560.7140.70940.7130.70790.720.71390.7160.71180.7230.71750.7180.71420.7220.71750.722

0.7176

0.58830.68750.61160.68750.6130.68750.62670.68750.6280.68750.63670.68750.63790.68750.380.68750.490.68750.920.68750.65030.68750.62910.750.62910.750.63090.750.910.750.65080.750.66350.750.6740.750.6740.750.67550.750.68250.750.620.750.69050.750.6992

Int.Ext.3

/4-27 UNSInt.Ext.3/4-28 UNInt.Ext.3/4-28 UNInt.Ext.3/4-32 UNInt.Ext.3

/4-32 UNInt.Ext.13/16-12 UNInt.Ext.13/16-12 UNInt.Ext.13/16-16 UNInt.Ext.13

/16-16 UN

Int.Ext.13

/16-20 UNEFInt.Ext.13

/16-28 UNInt.Ext.13/16-28 UNInt.Ext.13/16-32 UNInt.Ext.13/16-32 UN

Int.Ext.7

/8-9 UNCInt.Ext.7/8-9 UNCInt.Ext.7

/8-9 UNC

Int.Ext.7/8-10 UNSInt.Ext.7/8-12 UNInt.Ext.7

/8-12 UN

Int.Ext.7/8-14 UNFInt.Ext.7

/8-14 UNF

Int.

2B2A0.00122B2A0.00122B3A03B2A0.00112B3A03B2A0.00172B3A03B2A0.00152B3A03B2A0.00132B3A03B2A0.00122B3A03B2A0.00112B3A03B1A0.00191B2A0.00192B3A03B2A0.00182B2A0.00172B3A03B1A0.00161B2A0.0016

2B0.715

0.74880.7190.74880.720.750.71760.740.7240.750.72190.81080.740.81250.73290.8110.7590.81250.75330.81120.770.81250.76620.81130.7820.81250.78010.81140.7860.81250.78440.87310.7780.87310.7780.8750.76810.87320.7880.87330.8030.8750.79480.87340.8140.87340.814

0.7050.74210.710.74230.7110.74350.7110.74290.7160.7440.7160.79940.7220.80110.7220.80160.7450.80310.7450.80310.7580.80440.7580.80480.7740.8060.7740.80540.7790.80650.7790.85230.7550.85920.7550.86110.7550.86030.7670.86190.7850.86360.7850.85790.7980.86310.798

---------------0.8523

------0.7280.72290.7250.72080.7310.72590.7260.72180.7320.72680.7270.72390.7310.72680.7290.7250.7340.72970.730.7270.7330.72970.7570.75120.7660.75840.7580.75430.70.75840.770.76550.7780.77190.7720.76830.7770.77190.7790.77430.7860.780.780.77670.7840.780.7880.78430.7940.730.70.780.7930.730.7910.78750.7970.79220.7920.750.7960.79220.8010.79140.8150.80280.8010.79460.8110.80280.8030.79810.8090.80280.8080.80220.8180.810.8190.81370.8280.82090.8210.81680.8260.82090.8270.810.8390.82860.8270.82160.836

0.8286

0.750.70470.750.70620.750.70740.750.71140.750.71280.750.71160.81250.71330.81250.73650.81250.7380.81250.75170.81250.7530.81250.76870.81250.76990.81250.77420.81250.77530.81250.74080.8750.74080.8750.74270.8750.75420.8750.77410.8750.77580.8750.78840.8750.78840.875

Ext.Int.Ext.Int.Ext.Int.Ext.Int.Ext.Int.Ext.Int.Ext.Int.Ext.Int.Ext.Int.Ext.Int.Ext.Int.Ext.Int.

/8-14 UNF/8-16 UN/8-16 UN

/8-18 UNS

/8-20 UNEF/8-20 UNEF/8-24 UNS/8-27 UNS/8-28 UN/8-28 UN/8-32 UN/8-32 UN

3A3B2A2B3A3B2A2B2A2B3A3B2A2B2A2B2A2B3A3B2A2B3A3B00.001500.00140.001300.00120.00120.001200.00110

0.8750.80680.87350.8210.8750.81580.87360.8280.87370.8320.8750.82870.87380.840.87380.8440.87380.8450.8750.84260.87390.8490.8750.8469

0.870.7980.810.8070.86560.8070.0.8150.86560.8210.86690.8210.86660.830.86710.8350.86730.8360.86850.8360.86790.8410.8690.841

------------

0.8290.8340.8330.8410.8340.8390.8380.8450.8410.8480.8430.8470.8470.8530.850.8560.8510.8570.8520.8560.8540.8590.8550.858

0.82450.82860.8280.83440.83080.83440.83290.830.83680.84250.83920.84250.84260.84790.84580.85090.84680.85180.840.85180.850.85470.8520.8547

0.790.8750.790.8750.80050.8750.80750.8750.81420.8750.81550.8750.82420.8750.82970.8750.83120.8750.83240.8750.83670.8750.83780.875

a For Class 2A threads with coating (plating) the max. is increased by the allowance, to the basic size. Thisis the same value as Class 3A.

b For uncoated hot-rolled, but not standard fasteners with cold rolled threads

c UN series external thread, Max.Diameter=Basic - Allowance, for Class 1A and 2A =Basic for Class 3A

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