NPT_管螺纹尺寸参数

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

8

323.032

320.492

317.952

34.544

10.88

6.35

2

323.85

315.793

螺纹尺寸代

号每25.4mm 内的螺纹牙

数 n 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

距离牙数距离