典型英制美制螺纹基本代号和尺寸

主要依据:ANSI/ASME B1.1和B1.3M

典型外螺纹基本尺寸

螺纹规格螺纹精度等级大径中径小径
基本尺寸最大最小最大最小最大
0-802A0.06000.05950.05630.05140.04960.0442
0-803A0.06000.06000.05680.05190.05060.0447
1-642A0.07300.07240.06860.06230.06030.0532
1-643A0.07300.07300.06920.06290.06140.0538
1-722A0.07300.07240.06890.06340.06150.0554
1-723A0.07300.07300.06950.06400.06260.0560
2-562A0.08600.08540.08130.07380.07170.0635
2-563A0.08600.08600.08190.07440.07280.0641
2-642A0.08600.08540.08160.07530.07330.0662
2-643A0.08600.08600.08220.07590.07440.0668
3-482A0.09900.09830.09380.08480.08250.0727
3-483A0.09900.09900.09450.08550.08380.0734
3-562A0.09900.09830.09420.08670.08450.0764
3-563A0.09900.09900.09490.08740.08580.0771
4-402A0.11200.11120.10610.09500.09250.0805
4-403A0.11200.11200.10690.09580.09390.0813
4-482A0.11200.11130.10680.09780.09540.0857
4-483A0.11200.11200.10750.09850.09670.0864
5-402A0.12500.12420.11910.10800.10540.0935
5-403A0.12500.12500.11990.10880.10690.0943
5-442A0.12500.12430.11950.10950.10700.0964
5-443A0.12500.12500.12020.11020.10830.0971
6-322A0.13800.13720.13120.11690.11410.0989
6-323A0.13800.13800.13200.11770.11560.0997
6-402A0.13800.13720.13210.12100.11840.1065
6-403A0.13800.13800.13290.12180.11980.1073
8-322A0.16400.16310.15710.14280.13990.1248
8-323A0.16400.16400.15800.14370.14150.1257
8-362A0.16400.16320.15770.14520.14240.1291
8-363A0.16400.16400.15850.14600.14390.1299
10-242A0.19000.18900.18180.16190.15860.1379
10-243A0.19000.19000.18280.16290.16040.1389
10-322A0.19000.18910.18310.16880.16580.1508
10-323A0.19000.19000.18400.16970.16740.1517
1/4-202A0.25000.24890.24080.21640.21270.1876
1/4-203A0.25000.25000.24190.21750.21470.1887
1/4-282A0.25000.24900.24250.22580.22250.2052
1/4-283A0.25000.25000.24350.22680.22430.2062
5/16-182A0.31250.31130.30260.27520.27120.2431
5/16-183A0.31250.31250.30380.27640.27340.2443
5/16-242A0.31250.31140.30420.28430.28060.2603
5/16-243A0.31250.31250.30530.28540.28270.2614
3/8-162A0.37500.37370.36430.33310.32870.2970
3/8-163A0.37500.37500.36560.33440.33110.2983
3/8-242A0.37500.37390.36670.34680.34300.3228
3/8-243A0.37500.37500.36780.34790.34500.3239
7/16-142A0.43750.43610.42580.38970.38500.3485
7/16-143A0.43750.43750.42720.39110.38760.3499
7/16-202A0.43750.43620.42810.40370.39950.3749
7/16-203A0.43750.43750.42940.40500.40190.3762
1/2-132A0.50000.49850.48760.44850.44350.4041
1/2-133A0.50000.50000.48910.45000.44630.4056
1/2-202A0.50000.49870.49060.46620.46190.4374
1/2-203A0.50000.50000.49190.46750.46430.4387
9/16-122A0.56250.56090.54950.50680.50160.4617
9/16-123A0.56250.56090.54950.50680.50160.4617
9/16-142A0.56250.55100.55070.51460.50960.4760
9/16-162A0.56250.56110.55170.52050.51580.4866
9/16-163A0.56250.56250.55310.52190.51840.4880
9/16-182A0.56250.56110.55240.52500.52050.4950
9/16-183A0.56250.56250.55380.52640.52300.4964
9/16-202A0.56250.56120.55310.52870.52450.5017
9/16-203A0.56250.56250.55440.53000.52680.5030
9/16-242A0.56250.56130.55410.53420.53030.5117
9/16-243A0.56250.56250.55530.53540.53250.5129
9/16-322A0.56250.56150.55550.54120.53770.5243
9/16-323A0.56250.56250.55650.54220.53960.5253
5/8-112A0.62500.62340.61130.56440.55890.5119
5/8-113A0.62500.62500.61290.56600.56190.5135
5/8-182A0.62500.62360.61490.58750.58280.5554
5/8-183A0.62500.62500.61630.58890.58540.5568
3/4-102A0.75000.74820.73530.68320.67730.6255
3/4-103A0.75000.75000.73710.68500.68060.6273
3/4-162A0.75000.74850.73910.70790.70290.6718
3/4-163A0.75000.75000.74060.70940.70560.6733
7/8 -92A0.87500.87310.85920.80090.79460.7368
7/8 -93A0.87500.87500.86110.80280.79810.7387
7/8-142A0.87500.87340.86310.82700.82160.7858
7/8-143A0.87500.87500.86470.82860.82450.7874
1 -82A1.00000.99800.98300.91680.91000.8446
1 -83A1.00001.00000.98500.91880.91370.8466
1 -122A1.00000.99820.98680.94410.93820.8960
1 -123A1.00001.00000.98860.94590.94150.8978
1-1/8-72A1.12501.12281.10641.03001.02280.9475
1-1/8-122A1.12501.12321.11181.06911.06311.0210
1-1/4-72A1.25001.24781.23141.15501.14761.0725
1-1/4-122A1.25001.24821.23681.19411.18791.1460
1-3/8-62A1.37501.37261.35441.26431.25631.1681
1-3/8-122A1.37501.37311.36171.31901.31271.2709
1-1/2-62A1.50001.49761.47941.38931.38121.2931
1-1/2-122A1.50001.49811.48671.44401.43761.3959
1-3/4-52A1.75001.74731.72681.61741.60851.5019
2 – 62A2.00001.99711.97511.85281.84331.7245