管螺纹及钻孔直径

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1、尺寸代号25.4mm内的牙数n螺距pmm牙高hmm圆弧半径rmm基面上的直径有效螺纹长度mm基准长度圆锥内螺纹基面轴向位移的极限偏差±T2/2装配余量有效螺纹长度大径d=Dmm中径d2=D2mm小径d1=D1mm基本mm极限偏差±T1/2最大mm最小mmmm圈数基本mm最大mm最小mmmm圈数mm圈数1/16280.9070.5810.1257.2327.1426.5616.54.00.914.93.11.111/42.523/46.57.45.61/8280.9070.5810.1259.7289.1478.5666.54.00.914.93.11.11

2、1/42.523/46.57.45.61/4191.3370.8560.18413.15712.30111.4459.76.01.317.34.71.711/43.723/49.711.08.43/8191.3370.8560.18416.66215.80614.95010.16.41.317.75.11.711/43.723/410.111.48.81/2141.8141.1620.24920.99519.79318.63113.28.21.8110.06.42.311/45.023/413.215.011.43/4141.8141.1620.24926

3、.44125.27924.11714.59.51.8111.37.72.311/45.023/414.516.312.71112.3091.4790.31733.24931.77030.29116.810.42.3112.78.12.911/46.423/416.819.114.511/4112.3091.4790.31741.91040.43138.95219.112.72.3115.010.42.911/46.423/419.121.416.811/2112.3091.4790.31747.80346.32444.84519.112.72.3115.0

4、10.42.911/46.423/419.121.416.82112.3091.4790.31759.61458.13556.65623.415.92.3118.213.62.911/47.531/423.425.721.121/2112.3091.4790.31775.18473.70572.22626.717.53.511/221.014.03.511/29.2426.730.223.23112.3091.4790.31787.88486.40584.92629.820.63.511/224.117.13.511/29.2429.833.326.331

5、/2112.3091.4790.317100.33098.85197.37231.422.23.511/225.718.73.511/29.2431.434.927.94112.3091.4790.317113.030111.551110.07235.825.43.511/228.921.93.511/210.441/235.839.332.35112.3091.4790.317138.430136.951135.47240.128.63.511/232.125.13.511/211.5540.143.636.66112.3091.4790.317163.

6、830162.351160.87240.128.63.511/232.125.13.511/211.5540.143.636.6非螺纹密封的管螺纹基本尺寸及公差GB7306-87用螺纹密封的管螺纹基本尺寸及公差GB7306-87尺寸代号25.4mm内的牙数n螺距pmm牙高hmm圆弧半径rmm基面上的直径外螺纹内螺纹大径d=Dmm中径d2=D2mm小径d1=D1mm大径公差Td中径公差Td2中径公差TD2小径公差TD1下偏差mm上偏差mm下偏差mm上偏差mm下偏差mm上偏差mm下偏差mm上偏差mmA级mmB级mm1/1666280.9070.5810.125

7、7.7237.1426.561-0.2140-0.107-0.21400+0.1070+0.2821/8280.9070.5810.1259.7289.1478.566-0.2140-0.107-0.21400+0.1070+0.2821/4191.3370.8560.18413.15712.30111.445-0.2500-0.125-0.25000+0.1250+0.4453/8191.3370.8560.18416.66215.80614.950-0.2500-0.125-0.25000+0.1250+0.4451/2141.8141.1620.24

8、920.95519.79318.631-0.2840-0.142-