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1、英制螺纹标准对照表英制普通螺纹 (惠氏螺纹) - 小螺纹系列 (BA)名义尺寸牙型代号大径螺距每英寸牙数中径小径牙型高底孔直径BAmmmmtpimm外螺纹H1mmd=Dpd2=D2d3No. 14BA10.23110.40.860.720.140.75No. 13BA1.20.25101.61.050.90.150.95No. 12BA1.30.2890.711.130.960.171No. 11BA1.50.3181.931.3151.130.1851.2No. 10BA1.70.3572.571.491.280.211.35No. 9BA1.90.3965.121.6651.430.235
2、1.5No. 8BA2.20.4359.071.941.680.261.8No. 7BA2.50.4852.922.211.920.292No. 6BA2.80.5347.922.482.160.322.3No. 5BA3.20.5943.052.8452.490.3552.6No. 4BA3.60.6638.483.2052.810.3952.95No. 3BA4.10.7334.793.663.220.443.4No. 2BA4.70.8131.354.2153.730.4853.9No. 1BA5.30.928.224.764.220.544.4No. 0BA6125.45.44.80.
3、6555圆锥管螺纹型式和尺寸螺纹代号基本尺寸大径螺距每英寸牙数中径小径牙型高度圆弧尺寸底孔尺寸英 寸mmmmtpimm外螺纹H1rmmd=Dpd2=D2d3R 1/161/167.7230.907287.1426.5610.5810.1256.4R 1/81/89.7280.907289.1478.5660.5810.1258.4R 1/41/413.1571.3371912.30111.4450.8560.18411.2R 3/83/816.6621.3371915.80614.950.8560.18414.75R 1/21/220.9551.8141419.79318.6311.1620.
4、24918.25R 3/43/426.4411.8141425.27924.1171.1620.24923.75R 1133.2492.3091131.7730.2911.4790.31730R 1 1/41 1/441.912.3091140.43138.9521.4790.31738.5R 1 1/21 1/247.8032.3091146.32444.8451.4790.31744.5R 2259.6142.3091158.13556.6561.4790.31756R 2 1/22 1/275.1842.3091173.70572.2261.4790.31771R 3387.8842.3
5、091186.40584.9261.4790.31785.5R 44113.032.30911111.551110.0721.4790.317110.5R 55138.432.30911136.951135.4721.4790.317136R 66163.832.30911162.351160.8721.4790.317161.555圆锥管螺纹型式和尺寸螺纹代号基本尺寸大径螺距每英寸牙数中径小径牙型高度圆弧尺寸底孔尺寸英 寸mmmmtpimm外螺纹H1rmmd=Dpd2=D2d3R 1/161/167.7230.907287.1426.5610.5810.1256.4R 1/81/89.728
6、0.907289.1478.5660.5810.1258.4R 1/41/413.1571.3371912.30111.4450.8560.18411.2R 3/83/816.6621.3371915.80614.950.8560.18414.75R 1/21/220.9551.8141419.79318.6311.1620.24918.25R 3/43/426.4411.8141425.27924.1171.1620.24923.75R 1133.2492.3091131.7730.2911.4790.31730R 1 1/41 1/441.912.3091140.43138.9521.47
7、90.31738.5R 1 1/21 1/247.8032.3091146.32444.8451.4790.31744.5R 2259.6142.3091158.13556.6561.4790.31756R 2 1/22 1/275.1842.3091173.70572.2261.4790.31771R 3387.8842.3091186.40584.9261.4790.31785.5R 44113.032.30911111.551110.0721.4790.317110.5R 55138.432.30911136.951135.4721.4790.317136R 66163.832.3091
8、1162.351160.8721.4790.317161.5制惠氏螺纹的型式尺寸英制普通螺纹 (惠氏螺纹) - 粗牙 (BSW)名义尺寸牙型代号大径螺距每英寸牙数中径小径牙型高底孔直径Wwmmmmtpimm外螺纹H1mmd=Dpd2=D2d31/16BSW1.5870.423601.3151.050.271.153/32BSW2.3810.529482.0411.7030.3381.91/8BSW3.1750.635402.7682.3620.4062.55/32BSW3.9690.793323.4592.9520.5073.23/16BSW4.7621.058244.0843.4070.67
9、73.77/32BSW5.5561.058244.8784.2010.6774.51/4BSW6.351.27205.5374.7240.8135.15/16BSW7.9381.411187.0346.1310.9046.53/8BSW9.5251.588168.5097.4921.0177.97/16BSW11.1131.814149.9518.7891.1629.21/2BSW12.72.1171211.3459.991.35510.45/8BSW15.8762.3091114.39712.9181.47913.43/4BSW19.0512.541017.42415.7981.62716.
10、257/8BSW22.2262.822920.41918.6111.80719.251BSW25.43.175823.36821.3352.033221 1/8BSW28.5763.629726.25323.9292.32424.51 1/4BSW31.7513.629729.42827.1042.32427.251 3/8BSW34.9264.233632.21529.5052.71130.251 1/2BSW38.14.233635.39132.682.71133.51 5/8BSW41.2775.08538.02434.7713.25335.51 3/4BSW44.4525.08541.
11、19937.9463.25338.51 7/8BSW47.6275.6454 1/244.01240.3983.61441.252BSW50.8025.6454 1/247.18743.5733.61444.52 1/4BSW57.1526.35453.08649.024.066502 1/2BSW63.5026.35459.43655.374.066562 3/4BSW69.8537.2573 1/265.20560.5584.64761.53BSW76.2037.2573 1/271.55666.9094.647683 1/4BSW82.5537.8163 1/477.54872.5445.00573.753 1/2BSW88.9037.81
