螺纹孔底孔尺寸表(1)

普通粗牙螺孔攻丝前钻孔尺寸普通细牙螺孔攻丝前钻孔尺寸圆锥管螺孔攻丝前钻孔尺寸公称尺寸中国（旧）中国（新）Rc1/8″Rc1/4″Rc3/8″Rc1/2″Rc3/4″Rc1″日本PT1/8″PT1/4″PT3/8″PT1/2″PT3/4″PT1″圆柱管螺孔攻丝前钻孔尺寸底孔d公称尺寸底孔d8.4G1/8″布锥管螺孔攻丝前钻孔尺寸公称尺寸中国（旧）中国（新）NPT1/8″NPT1/4″NPT3/8″NPT1/2″NPT3/4″NPT1″公称尺寸底孔d公称尺寸底孔d公称尺寸底孔d公称尺寸底孔dM5×0.8M6×1M8×1.25M10×1.5M14×2M16×24.25.06.88.5M8×1M10×1M12×1M14×17.09.0M12×1.5M14×1.510.5M20×212.5M22×214.5M24×216.5M27×218.5M30×220.5M33×222.5M36×225.5M42×228.5M48×231.5M52×234.0.5M30×346.5M33×3M36×3M42×3M48×3M52×327.030.033.039.045.049.018.0ZG1/8″20.0ZG1/4″22.0ZG3/8″25.0ZG1/2″28.0ZG3/4″31.0ZG1″8.6Z1/8″11.7Z1/4″15.2Z3/8″18.8Z1/2″24.3Z3/4″30.5Z1″11.0G1/4″14.5G3/8″18.0G1/2″23.5G3/4″29.5G1″11.0M16×1.513.0M18×1.515.0M20×1.517.0M22×1.519.0M24×1.521.0M27×1.523.0M30×1.526.0M33×1.529.0M36×1.5M42×1.5M48×1.5M12×1.7510.2M16×112.0M18×114.0M20×134.0ZG1 1/4″Rc1 1/4″PT1 1/4″38.0G1 1/8″40.0ZG1 1/2″Rc1 1/2″PT1 1/2″44.0G1 1/4″46.0ZG2″ZG3″Rc2″Rc3″PT2″PT3″56.0G1 1/2″84.0G2″G1 1/4″G2 1/2″G2 3/4″G3″50.0ZG2 1/2″Rc2 1/2″PT2 1/2″72.0G1 3/4″35.2Z1 1/4″NPT1 1/4″39.2Z1 1/2″NPT1 1/2″45.1Z2″5156.962.9572.4578.885.2NPT2″M18×2.515.5M22×1M20×2.517.5M24×1M24×3M27×321.0M27×124.0M30×1M30×3.526.5M33×3.529.5M36×4M48×5M52×5M×632.043.047.058.0M42×4.537.5M56×5.550.5螺纹孔底孔尺寸表

孔

尺寸底孔d8.411.114.618.123.529.438.244.356.3