螺纹尺寸标准

inchExternal外螺紋Major DiaPitch DiaMax0.27520.27520.27640.27880.280.28430.28430.28540.28740.28830.28930.29120.29220.29360.29540.29820.33310.33310.33440.33760.34130.34250.34680.34680.34790.34980.35070.35180.3537Min0.26910.27120.27340.27480.2770.27880.28060.28270.28390.28490.28670.2880.28980.29050.29250.29550.32660.32870.33110.33330.33720.33940.34110.3430.3450.34620.34710.34910.3503Internal內螺紋Minor DiaMaxMin0.24520.24520.24640.25180.2530.26180.26180.26290.26740.26890.26990.27430.27530.27850.28180.28690.29920.29920.30050.30760.31430.31550.32430.32430.32540.32980.33130.33240.3368Class1B2B3B2B3B1B2B3B2B2B3B2B3B2B2B2B1B2B3B2B2B3B1B2B3B2B2B3B2BMinor DiaMin0.2520.2520.2520.2580.2580.2670.2670.2670.2720.2740.2740.2790.2790.2820.2850.290.3070.3070.3070.3150.3210.3210.330.330.330.3350.3360.3360.341Max0.2650.2650.2630.270.2680.2770.2770.27540.2810.2820.28070.2860.28470.2890.2910.2950.3210.3210.31820.3280.3320.32970.340.340.33720.3440.3450.34260.349Pitch DiaMin0.27640.27640.27640.280.280.28540.28540.28540.28840.28930.28930.29220.29220.29450.29630.2990.33440.33440.33440.33890.34250.34250.34790.34790.34790.35090.35180.35180.3547Max0.28430.28170.28030.28520.28390.29250.29020.2890.29290.29370.29260.29640.29530.29850.30010.30260.34290.34010.33870.34450.34790.34650.35530.35280.35160.35560.35640.35530.3591TapMajor DiaDrillMin0.31250.31250.31250.31250.31250.31250.31250.31250.31250.31250.31250.31250.31250.31250.31250.31250.3750.3750.3750.3750.3750.3750.3750.3750.3750.3750.3750.3750.375MaxBasic0.2660.2650.2650.2650.2650.2770.2770.2770.2770.2770.2770.2870.2870.2890.2890.2890.320.320.320.320.320.320.340.340.340.340.340.340.349SizeThread Designation螺紋尺寸規格名稱0.31255/16-18 UNC5/16-20 UN5/16-24 UNF5/16-27 UNS5/16-28 UN5/16-32 UNEF5/16-36 UNS5/16-40 UNS5/16-48 UNS0.3753/8-16 UNC3/8-18 UNS3/8-20 UN3/8-24 UNF3/8-24 UNF3/8-27 UNS3/8-28 UN3/8-32 UNEFClass1A2A3A2A3A1A2A3A2A2A3A2A3A2A2A2A1A2A3A2A2A3A1A2A3A2A2A3A2AMax0.31130.31130.31250.31130.31250.31140.31140.31250.31150.31150.31250.31150.31250.31160.31160.31170.37370.37370.3750.37370.37380.3750.37390.37390.3750.37390.37390.3750.374Min0.29820.30260.30380.30320.30440.30060.30420.30530.30480.3050.3060.30550.30650.30610.30650.30720.35950.36430.36560.3650.36570.36690.36310.36670.36780.36720.36740.36850.3683/8-36 UNS3/8-40 UNS0.390.390-27 UNS0.43757/16-14 UNC7/16-16 UN7/16-18 UNS7/16-20 UNF7/16-24 UNS7/16-27 UNS7/16-28 UNEF7/16-32 UN0.51/2-12 UNS1/2-13 UNC1/2-14 UNS1/2-16 UN1/2-18 UNS1/2-20 UNF1/2-24 UNS1/2-27 UNS1/2-28 UNEF1/2-32 UN3A2A2A2A1A2A3A2A3A2A1A2A3A2A2A2A3A2A3A2A3A1A2A3A2A2A3A2A1A2A3A2A2A2A3A2A0.3750.3740.37410.38890.43610.43610.43750.43610.43750.43620.43620.43620.43750.43640.43640.43640.43750.43650.43750.49840.50.49850.49850.50.49850.49860.50.49870.49870.49870.50.49880.49890.49890.50.4990.3690.36850.3690.38220.42060.42580.42720.42670.42810.42750.4240.42810.42940.42920.42970.42990.4310.43050.43150.4870.48860.48220.48760.48910.48820.48920.49060.490.48650.49060.49190.49160.49220.49240.49350.4930.35470.3560.35790.36480.38970.38970.39110.39550.39690.40010.40370.40370.4050.40930.41230.41320.41430.41620.41720.44430.44590.44850.44850.450.45210.4580.45940.46260.46620.46620.46750.47170.47480.47570.47680.47870.35220.35280.35480.36120.38260.3850.38760.39090.39350.39580.39750.39950.40190.40550.40870.40960.41160.41280.41470.43890.44190.44110.44350.44630.44710.45330.45590.45820.45980.46190.46430.46780.47110.4720.4740.47520.33780.34090.34430.34480.35110.35110.35250.36160.3630.37010.37670.37670.3780.38680.39230.39380.39490.39930.40030.39920.40080.40690.40690.40840.41350.42410.42550.43260.43920.43920.44050.44920.45480.45630.45740.46183B2B2B2B1B2B3B2B3B2B1B2B3B2B2B2B3B2B3B2B3B1B2B3B2B2B3B2B1B2B3B2B2B2B3B2B0.3410.3450.3480.350.360.360.360.370.370.3770.3830.3830.3830.3920.3970.3990.3990.4040.4040.410.410.4170.4170.4170.4230.4320.4320.440.4460.4460.4460.4550.460.4610.4610.4660.34690.3520.3540.3590.3760.3760.37170.3840.380.390.3950.3950.39160.4020.4060.4070.40510.4110.40940.4280.42230.4340.4340.42840.4380.4460.44190.4530.4570.4570.45370.4650.4690.470.46760.4740.35470.3570.35880.36590.39110.39110.39110.39690.39690.40140.4050.4050.4050.41040.41340.41430.41430.41720.41720.44590.44590.450.450.450.45360.45940.45940.46390.46750.46750.46750.47290.47590.47680.47680.47970.3580.36120.36280.37060.40030.39720.39570.40280.40140.4070.41310.41040.40910.41530.41810.41890.41780.42160.42050.45290.45110.45970.45650.45480.46010.46550.4640.46970.47590.47310.47170.4780.48070.48160.48040.48420.3750.3750.3750.390.43750.43750.43750.43750.43750.43750.43750.43750.43750.43750.43750.43750.43750.43750.43750.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.3490.3510.3510.360.3780.3780.3780.3780.3780.3780.3950.3950.3950.3950.3950.4080.4080.4080.4080.4280.4280.4280.4280.4280.4280.4280.4280.4280.4580.4580.4580.4580.4580.470.470.470.56259/16-12 UNC9/16-14 UNS9/16-16 UN9/16-18 UNF9/16-20 UN9/16-24 UNEF9/16-27 UNS9/16-28 UN9/16-32 UN0.6255/8-11 UNC5/8-12 UN5/8-14 UNS5/8-16 UN5/8-18 UNF5/8-20 UN5/8-24 UNEF5/8-27 UNS5/8-28 UN3A1A2A3A2A2A3A1A2A3A2A3A2A3A2A2A3A2A3A1A2A3A2A3A2A2A3A1A2A3A2A3A2A3A2A2A0.50.56090.56090.56250.5610.56110.56250.56110.56110.56250.56120.56250.56130.56250.56140.56140.56250.56150.56250.62340.62340.6250.62340.6250.62350.62360.6250.62360.62360.6250.62370.6250.62380.6250.62390.62390.4940.54370.54950.55110.55070.55170.55310.5480.55240.55380.55310.55440.55410.55530.55470.55490.5560.55550.55650.60520.61130.61290.6120.61360.61320.61420.61560.61050.61490.61630.61560.61690.61660.61780.61720.61740.47970.50680.50680.50840.51460.52050.52190.5250.5250.52640.52870.530.53420.53540.53730.53820.53930.54120.54220.56440.56440.5660.56930.57090.57710.5830.58440.58750.58750.58890.59120.59250.59670.59790.59980.60070.47710.4990.50160.50450.50960.51580.51840.51820.52050.5230.52450.52680.53030.53250.53360.53450.53650.53770.53960.55610.55890.56190.56390.56680.5720.57820.58080.58050.58280.58540.58690.58930.59270.59490.5960.59690.46280.46170.46170.46330.4760.48660.4880.4950.4950.49640.50170.5030.51170.51290.51730.51880.51990.52430.52530.51520.51520.51680.52420.52580.53850.54910.55050.55750.55750.55890.56420.56550.57420.57540.57980.58133B1B2B3B2B2B3B1B2B3B2B3B2B3B2B2B3B2B3B1B2B3B2B3B2B2B3B1B2B3B2B3B2B3B2B2B0.4660.4720.4720.4720.4850.4950.4950.5020.5020.5020.5080.5080.5170.5170.5220.5240.5240.5290.5290.5270.5270.5270.5350.5350.5480.5570.5570.5650.5650.5650.5710.5710.580.580.5850.5860.47190.490.490.48430.5010.5090.5040.5150.5150.51060.520.51620.5270.52440.5310.5320.53010.5360.53440.5460.5460.53910.5530.54630.5640.5710.56620.5780.5780.5730.5820.57870.590.58690.5940.5950.47970.50840.50840.50840.51610.52190.52190.52640.52640.52640.530.530.53540.53540.53840.53930.53930.54220.54220.5660.5660.5660.57090.57090.57860.58440.58440.58890.58890.58890.59250.59250.59790.59790.60090.60180.48310.51860.51520.51350.52260.5280.52650.53530.53230.53080.53550.53410.54050.53920.54320.54410.54290.54670.54560.57670.57320.57140.5780.57620.58520.59060.5890.5980.59490.59340.59810.59670.60310.60180.60590.60670.50.56250.56250.56250.56250.56250.56250.56250.56250.56250.56250.56250.56250.56250.56250.56250.56250.56250.56250.6250.6250.6250.6250.6250.6250.6250.6250.6250.6250.6250.6250.6250.6250.6250.6250.6250.470.490.490.490.490.490.490.5150.5150.5150.5150.5150.5270.5270.5270.5330.5330.5330.5330.5460.5460.5460.5530.5530.5530.5530.5530.5790.5790.5790.5790.5790.590.590.590.5955/8-32 UN0.687511/16-12 UN11/16-16 UN11/16-20 UN11/16-24 UNEF11/16-28 UN11/16-32 UN0.753/4-10 UNC3/4-12 UN3/4-14 UNS3/4-16 UNF3/4-18 UNS3/4-20 UNEF3/4-24 UNS3/4-24 UNS3/4-28 UN3/4-32 UN0.812513/16-10 UNC13/16-12 UN3A2A3A2A3A2A3A2A3A2A3A2A3A2A3A1A2A3A2A3A2A1A2A3A2A2A3A2A2A2A3A2A3A2A3A2A0.6250.62390.6250.68590.68750.68610.68750.68620.68750.68630.68750.68640.68750.68640.68750.74820.74820.750.74830.750.74850.74850.74850.750.74860.74870.750.74880.74880.74880.750.74890.750.81070.81250.81080.61850.61790.6190.67450.67610.67670.67810.67810.67940.67910.68030.67990.6810.68040.68150.72880.73530.73710.73690.73860.73820.73430.73910.74060.73990.74060.74190.74160.74210.74230.74350.74290.7440.79780.79960.79940.60180.60360.60470.63180.63340.64550.64690.65370.6550.65920.66040.66320.66430.66610.66720.68320.68320.6850.69420.69590.70210.70790.70790.70940.71250.71620.71750.72170.72470.72560.72680.72860.72970.74750.74930.75670.5990.60.6020.62640.62930.64070.64330.64940.65180.65520.65740.65940.66150.66250.66450.67440.67730.68060.68870.69180.6970.70040.70290.70560.70790.71180.71420.71760.72080.72180.72390.7250.7270.74160.74490.75120.58240.58670.58780.58670.58830.61160.6130.62670.6280.63670.63790.64380.64490.64920.65030.62910.62910.63090.64910.65080.66350.6740.6740.67550.68250.68920.69050.69920.70470.70620.70740.71170.71280.69340.68980.71163B2B3B2B3B2B3B2B3B2B3B2B3B2B3B1B2B3B2B3B2B1B2B3B2B2B3B2B2B2B3B2B3B2B3B2B0.5860.5910.5910.5970.5970.620.620.6330.6330.6420.6420.6490.6490.6540.6540.6420.6420.6420.660.660.6730.6820.6820.6820.690.6960.6960.7050.710.7110.7110.7160.7160.70450.70450.7220.59260.5990.59690.6150.60850.6340.62840.6450.64120.6520.64940.6570.65510.6610.65940.6630.6630.65450.6780.67070.6880.6960.6960.69080.7030.7070.70370.7150.7190.720.71760.7240.72190.72550.72550.740.60180.60470.60470.63340.63340.64690.64690.6550.6550.66040.66040.66430.66430.66720.66720.6850.6850.6850.69590.69590.70360.70940.70940.70940.71390.71750.71750.72290.72590.72680.72680.72970.72970.74750.74750.75840.60550.60930.60820.64050.63870.65310.65150.66060.65920.66560.66430.66920.6680.67180.67070.69650.69270.69070.70310.70130.71030.71920.71590.71430.71990.72320.72180.72820.7310.73180.73050.73440.73330.7590.75520.76560.6250.6250.6250.68750.68750.68750.68750.68750.68750.68750.68750.68750.68750.68750.68750.750.750.750.750.750.750.750.750.750.750.750.750.750.750.750.750.750.750.81250.81250.81250.5950.5950.5950.6160.6160.6160.6160.6160.6160.6520.6520.6520.6520.6520.6520.6630.6630.6630.680.680.680.6970.6970.6970.6970.7070.7070.7070.7070.720.720.720.720.740.740.7413/16-16 UN13/16-20 UNEF13/16-28 UN13/16-32 UN0.8757/8-9 UNC7/8-10 UNS7/8-12 UN7/8-14 UNF7/8-16 UN7/8-18 UNS7/8-20 UNEF7/8-24 UNS7/8-27 UNS7/8-28 UN7/8-32 UN0.937515/16-9 UNC15/16-12 UN15/16-16 UN15/16-20 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