英制管螺纹基本尺寸及其公差.pdf

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1、55º英制管螺纹的基本尺寸及其公差(GB/T7306-2000)外螺纹的有效螺纹不圆柱内螺纹直径的螺纹基准平面内的基本直径基准距离对应牙数螺距圆弧底孔小于极限偏差±T2/2尺寸牙高装配余量通经(n)(P)尺寸尺寸极限偏差代号大径中径小径基本最大最小基本最大最小径向轴向±T1/2inmmmmmmmmmmmmmmmmmm圈数mmmmmm圈数mmmmmmmm圈数1/16280.9070.5817.7237.1426.5610.1256.440.914.93.12.52¾6.57.45.60.0711¼1/86A280.9070.5819.7289.147

2、8.5660.1258.440.914.93.12.52¾6.57.45.60.0711¼1/48A191.3370.85613.15712.311.450.18411.261.317.34.73.72¾9.7118.40.1041¼3/810A191.3370.85616.66215.8114.950.18414.756.41.317.75.13.72¾10.111.48.80.1041¼1/215A141.8141.16220.99519.7918.630.24918.258.21.81106.452¾13.21511.40.1421¼3/42

3、0A141.8141.16226.44125.2824.120.24923.759.51.8111.37.752¾14.516.312.70.1421¼125A112.3091.47933.24931.7730.290.3173010.42.3112.78.16.42¾16.819.114.50.181¼1¼32A112.3091.47941.9140.4338.950.31738.512.72.311510.46.42¾19.121.416.80.181¼1½40A112.3091.47947.80346.3244.850.31744.512.7

4、2.311510.46.42¾19.121.416.80.181¼250A112.3091.47959.61458.1456.660.3175615.92.3118.213.67.53¼23.425.721.10.181¼2½65A112.3091.47975.18473.7172.230.3177117.53.51½21149.2426.730.223.20.2161½380A112.3091.47987.88486.4184.930.31785.520.63.51½24.117.19.2429.833.326.30.2161½3½112.309

5、1.479100.3398.8597.370.3173.51½0.2161½4100A112.3091.479113.03111.6110.10.317110.525.43.51½28.921.910.44½35.839.332.30.2161½5125A112.3091.479138.43137135.50.31713628.63.51½32.125.111.5540.143.636.60.2161½6150A112.3091.479163.83162.4160.90.317161.528.63.51½32.125.111.5540.143.63

6、6.60.2161½备注：圆柱内螺纹：Rp圆锥内螺纹：Rc圆锥外螺纹：R1(与圆柱内螺纹配合)R2（与圆锥内螺纹配合）