常用螺纹尺寸表(NPT)
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公称通径
NPS1/4″81912.711.29.7141/4″1813.2-0.211.4+0.210.2141/41913.1511.45
3/8101916.114.510.115 3/81816.6-0.214.8+0.210.4153/81916.6614.95
1/2151420.318.813.2181/21420.7-0.218.5+0.213.6181/21420.9518.63
3/4201425.724.214.5193/41426-0.323.7+0.213.7193/41426.4424.32
1251132.430.416.824111.532.6-0.329.7+0.217.42311133.2530.29
1-1/43211413919.1251-1/411.541.3-0.338.5+0.318261-1/41141.9138.95
1-1/2401146.94519.1261-1/211.547.4-0.344.5+0.318.4261-1/21147.844.8
2501158.556.823.426211.559.4-0.356.6+0.319.23021159.656.66
2-1/2651174.772.426.7362-1/2871.6-0.467.6+0.328.9332-1/21175.1872.22
3801186.585.129.8403887.4-0.483.5+0.430.53731187.8884.92
410011111.3110.335.84348112.6-0.5108.9+0.43343411113.1110
512511135.6135.640.15058139.4-0.5135.9+0.435.750511138.4135.4
615011161.516140.15568166.2-0.5162.7+0.438.455611163.8160.8888216-0.560内螺纹口径外螺纹顶/外顶圆G(55°)园柱管螺纹ZG55°(RC)园锥管螺纹
每寸牙数K60°(NPT)园锥管螺纹
内螺纹口径/内基圆公称通径每寸牙数外螺纹顶圆每寸牙数外径内径常用螺纹尺寸表
加工牙长公称通径有效牙长加工牙长有效牙长