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No.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.9BA1.90.3965.121.6651.430.2351.5No.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.0BA6125.45.44.80.65基本尺寸大径螺距每英寸牙数中径小径牙型高圆弧尺寸底孔尺寸英寸mmmmtpimm外螺纹H1rmmd=Dpd2=D2d3R1/161/16＂7.720.907287.1426.5610.5810.1256.4R1/81/8＂9.730.907289.1478.5660.5810.1258.4R1/41/4＂13.21.3371912.30111.450.8560.18411.2R3/83/8＂16.71.3371915.80614.950.8560.18414.75R1/21/2＂211.8141419.79318.631.1620.24918.25R3/43/4＂26.41.8141425.27924.121.1620.24923.75R11＂33.22.3091131.7730.291.4790.31730R11/411/4＂41.92.3091140.43138.951.4790.31738.5R11/211/2＂47.82.3091146.32444.851.4790.31744.5R22＂59.62.3091158.13556.661.4790.31756R21/221/2＂75.22.3091173.70572.231.4790.31771R33＂87.92.3091186.40584.931.4790.31785.5R44＂1132.30911111.55110.11.4790.317110.5R55＂1382.30911136.95135.51.4790.317136R66＂1642.30911162.35160.91.4790.317161.5RC2英寸锥管螺纹，每英寸11牙，螺距=25.4/11即2.309，牙高（深）=2.309×0.64即1.479，锥度是固定的即1：16，R等于1/32乘以长度，1/32意思是，锥螺纹的锥度是1：16，单边就是1：32，长度意思是：定位点加有效长度，比如我定位3.0，有效长度是12.0，R=1/32X（3+12）=0.46875英制普通螺纹(惠氏螺纹)--小螺纹系列(BA)螺纹代号55°圆锥管螺纹型式和尺寸名义尺寸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=D2d31/16＂BSW1.590.423601.3151.050.271.153/32＂BSW2.380.529482.0411.7030.3381.91/8＂BSW3.180.635402.7682.3620.4062.55/32＂BSW3.970.793323.4592.9520.5073.23/16＂BSW4.761.058244.0843.4070.6773.77/32＂BSW5.561.058244.8784.2010.6774.51/4＂BSW6.351.27205.5374.7240.8135.15/16＂BSW7.941.411187.0346.1310.9046.53/8＂BSW9.531.588168.5097.4921.0177.97/16＂BSW11.11.814149.9518.7891.1629.21/2＂BSW12.72.1171211.3459.991.35510.45/8＂BSW15.92.3091114.39712.921.47913.43/4＂BSW19.12.541017.42415.81.62716.257/8＂BSW22.22.822920.41918.611.80719.251＂BSW25.43.175823.36821.342.0332211/8＂BSW28.63.629726.25323.932.32424.511/4＂BSW31.83.629729.42827.12.32427.2513/8＂BSW34.94.233632.21529.512.71130.2511/2＂BSW38.14.233635.39132.682.71133.515/8＂BSW41.35.08538.02434.773.25335.513/4＂BSW44.55.08541.19937.953.25338.517/8＂BSW47.65.64541/244.01240.43.61441.252＂BSW50.85.64541/247.18743.573.61444.521/4＂BSW57.26.35453.08649.024.0665021/2＂BSW63.56.35459.43655.374.0665623/4＂BSW69.97.25731/265.20560.564.64761.53＂BSW76.27.25731/271.55666.914.6476831/4＂BSW82.67.81631/477.54872.545.00573.7531/2＂BSW88.97.81631/483.89978.895.0058033/4＂BSW95.38.467389.83284.415.42285.54＂BSW1028.467396.18290.765.4229241/4＂BSW1088.83527/8102.396.645.6579841/2＂BSW1148.83527/8108.651035.657104.243/4＂BSW1219.23723/4114.74108.65.9151105＂BSW1279.23723/4121.09115.25.915116.551/4＂BSW1339.67725/8127.161216.196122.551/2＂BSW1409.67725/8133.51127.36.196128.553/4＂BSW14610.1621/2139.551336.506134.56＂BSW15210.1621/2145.9139.46.506141英制普通螺纹(惠氏螺纹)--粗牙(BSW)牙型代号名义尺寸大径螺距每英寸牙数中径小径牙型高底孔直径BSFmmmmtpimm外螺纹H1mmd=Dpd2=D2d33/16BSF4.760.79432...
