NPT螺纹尺寸

大径中径小径(基准直径)d2＝D2d1＝D1d ＝D 1\16277.8957.142 6.389 4.064 4.32 2.82237.938 6.1351\82710.2429.4898.736 4.102 4.36 2.822310.2878.481\41813.61612.48711.358 5.786 4.1 4.234313.71610.9973\81817.05515.92614.797 6.096 4.32 4.234317.14514.4161\21421.22319.77218.3218.128 4.48 5.443321.33617.8133\41426.56825.11723.6668.611 4.75 5.443326.6723.128111.533.22831.46129.69410.16 4.6 6.627333.40129.0591 1\411.541.98540.21838.45110.668 4.83 6.627342.16437.7841 1\211.548.05446.28744.5210.688 4.83 6.627348.2643.854211.560.09258.32556.55811.074 5.01 6.627360.32555.8662 1\2872.69970.15967.61917.323 5.46 6.35273.02566.5363888.60886.06883.52819.456 6.13 6.35288.982.3123 1\28101.31698.77696.23620.853 6.57 6.352101.694.93248113.973111.433108.89321.438 6.75 6.352114.3107.55358140.952138.412135.87223.87.5 6.352141.3134.38468167.792165.252162.71224.3337.66 6.352168.275161.19188218.441215.901213.361278.5 6.352219.075211.673108272.312269.772267.23230.7349.68 6.352273.05265.31112

323.032

320.492

317.952

34.544

10.88

6.35

323.85

315.793

牙数距离螺纹尺寸代号每25.4mm

内的螺纹牙数

圆锥外螺纹小端面处的螺纹

外径H=0.8666025P h=0.8P f=0.033P

牙数基面上的基本直径

基准距离L1

装配余量L3

管子外径

距离