典型美制英制内螺纹基本尺寸

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基本尺寸小径中径大径
最小最大最小最大最小
0-802B0.06000.04650.05140.05190.05420.0600
0-803B0.06000.04650.05140.05190.05360.0600
1-642B0.07300.05610.06230.06290.06550.0730
1-643B0.07300.05610.06230.06290.06480.0730
1-722B0.07300.05800.06350.06400.06650.0730
1-723B0.07300.05800.06350.06400.06590.0730
2-562B0.08600.06670.07370.07440.07720.0860
2-563B0.08600.06670.07370.07440.07650.0860
2-642B0.08600.06910.07530.07590.07860.0860
2-643B0.08600.06910.07530.07590.07790.0860
3-482B0.09900.07640.08450.08550.08850.0990
3-483B0.09900.07640.08450.08550.08770.0990
3-562B0.09900.07970.08650.08740.09020.0990
3-563B0.09900.07970.08650.08740.08950.0990
4-402B0.11200.08490.09390.09580.09910.1120
4-403B0.11200.08490.09390.09580.09820.1120
4-482B0.11200.08940.09680.09850.10160.1120
4-483B0.11200.08940.09680.09850.10080.1120
5-402B0.12500.09790.10620.10880.11210.1250
5-403B0.12500.09790.10620.10880.11130.1250
5-442B0.12500.10040.10790.11020.11340.1250
5-443B0.12500.10040.10790.11020.11260.1250
6-322B0.13800.10400.11400.11770.12140.1380
6-323B0.13800.10400.11400.11770.12040.1380
6-402B0.13800.11100.1190.12180.12520.1380
6-403B0.13800.11100.11860.12180.12430.1380
8-322B0.16400.13000.1390.14370.14750.1640
8-323B0.16400.13000.13890.14370.14650.1640
8-362B0.16400.13400.1420.14600.14960.1640
8-363B0.16400.13400.14160.14600.14870.1640
10-242B0.19000.14500.15600.16290.16720.1900
10-243B0.19000.14500.15550.16290.16610.1900
10-322B0.19000.15600.16400.16970.17360.1900
10-323B0.19000.15600.16410.16970.17260.1900
1/4-202B0.25000.19600.20700.21750.22480.2500
1/4-203B0.25000.19600.20700.21750.2200.2500
1/4-282B0.25000.21100.2200.22680.23110.2500
1/4-283B0.25000.21100.21900.22680.23000.2500
5/16-182B0.31250.25200.2650.27640.28170.3125
5/16-183B0.31250.25200.26300.27640.28030.3125
5/16-242B0.31250.26700.2770.28540.29020.3125
5/16-243B0.31250.26700.27540.28540.28900.3125
3/8-162B0.37500.30700.3210.33440.34010.3750
3/8-163B0.37500.30700.31820.33440.33870.3750
3/8-242B0.37500.33000.3400.34790.35280.3750
3/8-243B0.37500.33000.33720.34790.35160.3750
7/16-142B0.43750.36000.3760.39110.39720.4375
7/16-143B0.43750.36000.37170.39110.39570.4375
7/16-202B0.43750.38300.3950.40500.41040.4375
7/16-203B0.43750.38300.39160.40500.40910.4375
1/2-132B0.50000.41700.4340.45000.45650.5000
1/2-133B0.50000.41700.42840.45000.45480.5000
1/2-202B0.50000.44600.4570.46750.47310.5000
1/2-203B0.50000.44600.45370.46750.47170.5000
9/16-122B0.56250.47200.49000.50840.51520.5625
9/16-123B0.56250.47200.48430.50840.51350.5625
9/16-142B0.56250.48500.50100.51610.52260.5625
9/16-162B0.56250.49500.50900.52190.52800.5625
9/16-163B0.56250.49500.50400.52190.52650.5625
9/16-182B0.56250.50200.51500.52640.53230.5625
9/16-183B0.56250.50200.51060.52640.53080.5625
9/16-202B0.56250.50800.52000.53000.53550.5625
9/16-203B0.56250.50800.51620.53000.53410.5625
9/16-242B0.56250.51700.52700.53540.54040.5625
9/16-243B0.56250.51700.52440.53540.53920.5625
9/16-322B0.56250.52900.53600.54220.54670.5625
9/16-323B0.56250.52900.53440.54220.54560.5625
5/8-112B0.62500.52700.5460.56600.57320.6250
5/8-113B0.62500.52700.53910.56600.57140.6250
5/8-182B0.62500.56500.5780.58890.59490.6250
5/8-183B0.62500.56500.57300.58890.59340.6250
3/4-102B0.75000.64200.6630.68500.69270.7500
3/4-103B0.75000.64200.65450.68500.69070.7500
3/4-162B0.75000.68200.6960.70940.71590.7500
3/4-163B0.75000.68200.69080.70940.71430.7500
7/8 -92B0.87500.75500.7780.80280.81100.8750
7/8 -93B0.87500.75500.76810.80280.80890.8750
7/8-142B0.87500.79800.8140.82860.83560.8750
7/8-143B0.87500.79800.80680.82860.83390.8750
1 -82B1.00000.86500.8900.91880.92761.0000
1 -83B1.00000.86500.87970.91880.92541.0000
1 -122B1.00000.91000.9280.94590.95351.0000
1 -123B1.00000.91000.91980.94590.95161.0000
1 1/8-72B1.12500.97000.9981.03221.04161.1250
1 1/8-122B1.12501.03501.0531.07091.07871.1250
1 1/4-72B1.25001.09501.1231.15721.16681.2500
1 1/4-122B1.25001.16001.1781.19591.20391.2500
1 3/8-62B1.37501.19501.2251.26671.27711.3750
1 3/8-122B1.37501.28501.3031.32091.32911.3750
1 1/2-62B1.50001.32001.3501.39171.40221.5000
1 1/2-122B1.50001.41001.4281.44591.45421.5000
1 3/4-52B1.75001.53401.5681.62011.63171.7500
2 -62B2.00001.8201.8501.89171.90282.0000