美制60°圆锥管螺纹基本尺寸和底孔.doc

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1、美制60°密封圆锥管螺纹代号NPT螺纹尺寸代号牙数n螺距p牙高h基本直径钻孔直径大径中径小径使用铰刀不用铰刀d=Dd2=D2d1=D11/16270.9410.7537.8957.1426.3896.106.251/8270.9410.75310.2429.4898.7368.338.431/4181.4111.12913.61612.48711.35810.7211.133/8181.4111.12917.05515.92614.79714.2714.271/2141.8141.14521.22319.77218.32117.4817.

2、863/4141.8141.14526.56825.11723.66622.6323.01111.52.2091.76733.22831.46129.69428.5818.9811/411.52.2091.76741.98540.21838.45137.3137.6911/211.52.2091.76748.05446.28744.52043.6644.04211.52.2091.76760.09258.32556.55855.5855.96