英制螺纹基本尺寸表

3/1624 1.06 4.09 4.63 4.50 4.24 3.56 3.97 3.710.610.600.81 1/420 1.27 5.54 6.20 6.05 5.75 4.91 5.39 5.100.740.720.21 5/1618 1.417.037.787.627.32 6.34 6.86 6.550.820.800.24 3/816 1.598.519.369.208.907.738.297.970.930.900.27 7/1614 1.819.9510.9310.7510.459.069.679.33 1.07 1.030.30 1/212 2.1211.3512.5412.3011.9010.3010.9610.61 1.26 1.200.35 9/1612 2.1212.9314.0813.8713.4711.8912.5612.20 1.25 1.200.35 5/811 2.3114.4015.6515.4315.0313.2613.9413.60 1.37 1.310.39 3/410 2.5417.4218.8118.5718.1716.1719.9216.54 1.51 1.440.42 7/89 2.8220.4221.9621.7021.2019.0319.8219.45 1.67 1.600.4718 3.1823.3725.1124.8224.3221.8022.6722.27 1.89 1.800.531 1/87 3.6326.2528.2527.9327.3324.4625.4324.99 2.16 2.060.611 1/47 3.6329.4331.4231.0930.4927.6428.5928.18 2.16 2.060.611 3/86 4.2332.2234.5634.2033.6030.1331.2330.76 2.53 2.400.711 1/26 4.2335.3937.7337.3636.7633.3134.3833.94 2.53 2.400.711 5/85 5.0838.0240.8540.4339.6335.5236.7536.27 3.04 2.880.851 3/45 5.0841.2044.0243.5942.7938.7039.9539.45 3.04 2.880.851 7/8 4 1/2 5.6444.0147.1546.6845.8841.2342.5842.06 3.38 3.200.942 4 1/2 5.6447.1950.3249.8449.0444.4145.7945.25 3.38 3.200.942 1/44 6.3553.0856.6256.0955.2949.9651.4450.90 3.80 3.60 1.062 1/24 6.3559.4362.9762.4461.6456.3057.7957.29 3.80 3.60 1.062 3/4 3 1/27.2665.2069.2668.6767.8761.6363.3262.70 4.35 4.11 1.213 3 1/27.2671.5575.6175.0274.2267.9869.6769.05 4.35 4.11 1.213 1/4 3 1/47.8277.5581.9181.2780.3773.7075.4674.86 4.68 4.43 1.313 1/2 3 1/47.8283.9088.2687.6286.7280.0581.8681.21 4.68 4.43 1.313 3/438.4789.8394.5593.8592.9585.6687.6086.91 5.07 4.80 1.41438.4796.18100.90100.2099.30

92.01

93.95

93.26

5.07

4.80

1.41

55°英制螺纹基本尺寸表

公称直径（d)

螺距（t)

中径（d2)

外螺纹外经*(d)

牙槽底宽(b) 名义尺寸

最小

名义尺寸最小注：（1）括号内的尺寸尽可能不采用，（2）牙槽底宽(b)指外螺纹。

每寸牙数（n)

最大

最大牙形高度外螺纹（h1)内螺纹（h′1)内螺纹内经(d1)选用钻头