美制螺纹标准大全

1、美制螺纹标准人全外螺纹External内螺纹internalMinor neterNomi nal Sin e,Threads per In ch,a nd Series rioc? inn a+icn级 别Class公差Allowanee大径 Major Diameter中径 Pitch Diameter小径UNRMin oraDiam.Max(Ref.)级 别Class小径fDiamMaxbMinMindMaxhMinMinoDSfUN弹on2A：0.00050.05950.05630.05140.04960.04462B:0.04653Ap 0 n0.060.05680.05190.05

2、06P0.04513B0.04651-64 UNC2A0.00060.07240.06860.06230.06030.05382B0.05613A00.0730.06920.06290.06140.05443B:0.05611-72 UNF2A：0.00060.07240.06890.06340.0615P 0.05592BP 0.0583A00.0730.06950.0640.06260.05653B0.0582-56 UNC2A0.00060.08540.08130.07380.07170.06422B:0.06673A00.0860.08190.07440.07280.06483Bf 0

3、.06672-64 UNF2A0.00060.08540.08160.07530.07330.06682B0.06913A00.0860.08220.07590.07440.06743B0.06913-48 UNC2A0.00070.09830.09380.08480.08250.07342B:0.07643A00.0990.09450.08550.08380.07413B0.07643-56 UNF2A0.00070.09830.09420.08670.08450.07712B0.07973Ar 0 d0.0990.09490.08740.08580.07783B:0.07974-40 UN

4、C2A0.0008：0.11120.10610.0950.09250.08142B:0.08493A00.1120.10690.09580.09390.08223B0.08494-48 UNF2A0.00070.11130.10680.09780.09540.08642B0.08943A00.1120.10750.09850.09670.08713B0.08945-40 UNC2A0.00080.12420.11910.1080.10540.09442B0.09793Ar 010.1250.11990.10880.10690.09523B:0.09795-44 UNF2A0.00070.124

5、30.11950.10950.1070.09722B0.10043A00.1250.12020.11020.10830.09793B0.10046-32 UNC2A：0.0008：0.13720.13120.11690.11410.12Br 0.1043A00.1380.1320.11770.11560.10083B0.1046-40 UNF2A0.00080.13720.13210.1210.11840.10742B0.1113A:00.1380.13290.12180.11980.10823BP 0.1118-32 UNC2A0.00090.16310.15710.14280.13990.

6、12592B0.133A00.1640.1580.14370.14150.12683B0.138-36 UNF2A：0.0008：0.16320.15770.14520.1424r 0.13012BP 0.1343A00.1640.15850.1460.14390.13093B0.13410-24 UNC2A0.0010.1890.18180.16190.15860.13942B0.1453A:00.190.18280.16290.16040.14043B0.14510-28 UNS2Ar 0.00110.1890.18250.16580.16250.14642BP 0.15110-32 UN

7、F2A0.00090.18910.18310.16880.16580.15192B0.1563A00.190.1840.16970.16740.15283B0.15610-36 UNS2A000090.18910.18360.17110.16810.1562Br 0.1610-40 UNS2A0.00090.18910.1840.17290.170.15922B0.16310-48 UNS2A0.00080.18920.18470.17570.17310.16442B0.16710-56 UNS2A0.00070.18930.18520.17770.17520.16812B0.17112-24

8、 UNC2A0.0010.2150.2078 0.18790.18450.16542B0.171第 2 页，共 6 页2013-5-2外螺纹External内螺纹In ternalNomi nalSin e,Threadsper In ch,a ndSeriesDesig nati on级别Clas公差Allowa大径 Major Diameter中径 Pitch Diameter'neebMaxMinMindhMaxMin小径UNRMin orDiam.aMax(Ref.)级别Clas12-28 UNF3A2A3A00.00100.2160.2150.2160.20880.20850

9、.20950.18890.19180.19280.18630.18860.19040.16640.17240.17343B2B3B12-32 UNEF12-36 UNS12-40 UNS12-48 UNS12-56 UNS2A3A2A2A2A2A1A1/4-20 UNC2A0.000900.00090.00090.00080.00070.00110.00110.21510.2160.21510.21510.21520.21530.24890.24890.20910.210.20960.210.21070.21120.23670.24080.2370.19480.19570.19710.1989

10、0.20170.20370.21640.21640.19170.19330.19410.1960.19910.20120.21080.21270.17790.17880.18210.18350.19040.19410.18940.18942B3B2B2B2B2B1B2B1/4-24 UNS1/4-27 UNS1/4-28 UNF3A2A2A1A2A1/4-32 UNEF3A2A3A00.00110.0010.0010.0010-0.00100.250.24890.2490.2490.2490.250.2490.250.24190.24170.24230.23920.24250.24350.24

11、30.2440.21750.22180.22490.22580.22580.22680.22870.22970.21470.21810.22140.22080.22250.22430.22550.22730.19050.19930.20490.20640.20640.20740.21180.21283B2B2B1B2B3B2B3B小径Mi nor DiameterMin0.1710.1770.1770.1820.1820.1860.1890.1930.1970.1960.1960.1960.2050.210.2110.2110.2110.2160.2161/4-36 UNS1/4-40 UNS

12、1/4-48 UNS1/4-56 UNS2A2A2A5/16-18 UNC5/16-20 UN2A1A2A3A2A0.00090.00090.00080.00080.00120.00120一0.00120.24910.24910.24920.24920.31130.31130.31250.31130.24360.2440.24470.24510.29820.30260.30380.30320.2980.23110.23290.23570.23760.27520.27520.27640.27880.2280.230.2330.2350.26910.27120.27340.27480.21610.

13、21930.22430.2280.24520.24520.24640.25182B2B2B2B1B2B3B2B0.220.2230.2270.2310.2520.2520.2520.2585/16-24 UNF5/16-27 UNS5/16-28 UN3A1A2A3A2A5/16-32 UNEF2A3A2A00.00110.001100.0010.00100.0010.31250.31140.31140.31250.31150.31150.31250.31150.30440.30060.30420.30530.30480.3050.3060.30550.280.28430.28430.2854

14、0.28740.28830.28930.29120.2770.27880.28060.28270.28390.28490.28670.2880.2530.26180.26180.26290.26740.26890.26990.27433B1B2B3B2B2B3B2B0.2580.2670.2670.2670.2720.2740.2740.2795/16-36 UNS5/16-40 UNS5/16-48 UNS3A2A2A3/8-16 UNC2A1A2A00.00090.00090.00080.00130.00130.31250.31160.31160.31170.37370.37370.306

15、50.30610.30650.30720.35950.36430.360.29220.29360.29540.29820.33310.33310.28980.29050.29250.29550.32660.32870.27530.27850.28180.28690.29920.29923B2B2B2B1B2B0.2790.2820.2850.290.3070.307第4页，共6页2013-5-2外螺纹External内螺纹internalMinor neterNomi nal Sin e,Threads per In ch,a nd Series级 别Class公差Allowanee大径 Ma

16、jor Diameter中径 Pitch Diameter小径UNR Min or Diam.aMax(Ref.)级 别Class小径fDiambMaxMinMindhMaxMinMinDesignation3A:00.3750.36560.33440.33110.30053B:0.3073/8-18 UNS2A0.00130.37370.3650.33760.33330.30762B:0.3153/8-20 UN2A0.00120.37380.36570.34130.33720.31432B0.3213A00.3750.36690.34250.33940.31553Br 0.3211A0.0

17、0110.37390.36310.34680.34110.32431Br 0.333/8-24 UNF2A0.00110.37390.36670.34680.3430.32432B0.333A00.3750.36780.34790.3450.32543Br 0.333/8-27 UNS2A0.00110.37390.36720.34980.34620.32982Br 0.3353/8-28 UN2A0.00110.37390.36740.35070.34710.33132B0.3363A:00.3750.36850.35180.34910.33243B0.3363/8-32 UNEF2A0.0

18、010.3740.3680.35370.35030.33682Br 0.3413A00.3750.3690.35470.35220.33783B0.3413/8-36 UNS2Ar 0.0010.3740.36850.3560.35280.34092B:0.3453/8-40UNS2A0.00090.37410.3690.35790.35480.34432BP 0.3480.390-27 UNS2A0.00110.38890.38220.36480.36120.34482B0.351A0.00140.43610.42060.38970.38260.35111B:0.367/16-14 UNC2

19、A0.00140.43610.42580.4210.38970.3850.35112Br 0.363A00.43750.42720.39110.38760.35253B0.367/16-16 UN2A0.00140.43610.42670.39550.39090.36162Br 0.373Ap 0 n0.43750.42810.39690.39350.3633Br 0.377/16-18 UNS2A0.00130.43620.42750.40010.39580.37012B0.3771A0.00130.43620.4240.40370.39750.37671B0.3837/16-20 UNF2

20、A0.00130.43620.42810.40370.39950.37672Br 0.3833A00.43750.42940.4050.40190.3783B0.3837/16-24 UNS2A0.00110.43640.42920.40930.40550.38682B0.3927/16-27 UNS2A0.0011!0.43640.42970.41230.40870.39232BP 0.3977/16-28 UNEF2A0.00110.43640.42990.41320.40960.39382B0.3993A00.43750.4310.41430.41160.39493B0.3997/16-

21、32 UN2A0.0010.43650.43050.41620.41280.39932B0.4043A00.43750.43150.41720.41470.40033B0.4041/2-12 UNS2A0.00160.49840.4870.44430.43890.39922B0.413Ap 0 n0.50.48860.44590.44190.40083Br 0.411A0.00150.49850.48220.44850.44110.40691B0.4171/2 UNC2A0.00150.49850.48760.4820.44850.44350.40692B0.4173Ar 0 n0.50.48910.450.44630.40843BP 0.4171/2-14 UNS2A0.00150.49850.48820.45210.44710.41352B0.423第5页，共6页2013-5-2Internal径 Mi nor Diameter25.4第4页，共6页2013-5-2Max0.05140.0