螺纹底孔尺寸表

表中底孔直径d请合理选用钻头普通粗牙螺孔公称尺寸M5*0.8M6*1M8*1.25M10*1.5底孔d4.25.06.88.5公称尺寸M8*1M10*1M12*1M14*1M16*1M18*1M20*1M22*1M24*1M27*1M30*1底孔d7.09.011.013.015.017.019.021.023.026.029.0普通细牙螺纹公称尺寸M12*1.5M14*1.5M16*1.5M18*1.5M20*1.5M22*1.5M24*1.5M27*1.5M30*1.5M33*1.5M36*1.5M42*1.5M48*1.5底孔d10.512.514.516.518.520.522.525.528.531.534.540.546.5M30*3M33*3M36*3M42*3M48*3M52*327.030.033.039.045.049.0公称尺寸M20*2M22*2M24*2M27*2M30*2M33*2M36*2M42*2M48*2M52*2底孔d18.020.022.025.028.031.034.040.046.050.0英制粗螺纹UNC 牙型60° NC英制惠氏螺纹BSW 牙型55°圆柱管螺孔G=RP 牙型55°圆锥管螺纹ZG=RC=R=PT 牙型55°布锥管螺纹Z=NPT 牙型60°公称 牙尺寸 数8-320.164-3210-240.190-2412-240.216-241/4-200.250-201-81.000-8底孔d公称 牙尺寸 数3/16\"-241/4\"-205/16\"-183/8\"-167/16\"-141/2\"-129/16\"-125/8\"-113/4\"-107/8\"-9.01\"-8.01/8\"-7.011/4\"-7.011/2\"-6.01/8\"-5.013/4\"-5.017/8\"-41/22\"- 41/251底孔d3.75.16.57.99.310.512.113.516.419.322.024.727.933.535.839.041.544.7公称 牙尺寸 数G 1/8\"-28G 1/4\"-19G 3/8\"-19G 1/2\"-14G 3/4\"-14G 1\"-11G 11/8\"-11G 1/4\"-11G 1/2\"-11G 13/4\"-11G 2\"-11G 2/4\"-11G 21/2\"-11G 21/4\"-11G 3\"-11111底孔d8.6011.7015.2018.8024.3030.5035.2039.2045.1051.0056.9062.9572.4578.8085.20公称 牙尺寸 数Rc 1/8\"-28Rc 1/4\"-19Rc 3/8\"-19Rc 1/2\"-14Rc 3/4\"-14Rc 1\" -11Rc 11/4-11Rc 1/2\"-11Rc 2\"-11Rc 21/2\"-11Rc 3\"-111底孔d8.411.014.518.023.529.538.044.056.072.084.0公称 牙尺寸 数Z 1/8\"-27Z 1/4\"-18Z 3/8\"-18Z 1/2\"-14Z 3/4\"-14Z 1\"-11/2Z 11/4\"-111/2Z 1/3\"-11/2Z 2\"-11/21111底孔d8.411.114.618.123.629.438.244.356.33.6M12*1.7510.2M14*2M16*2M18*2.5M20*2.5M24*3M27*3M30*3.5M33*3.5M36*4M42*4.5M48*5M52*5M56*5.5M64*612.014.015.517.521.024.026.529.532.037.543.047.050.558.04.14.75.322.7英制细螺纹UNF 牙型60° NF公称 牙尺寸 数6-400.138-408-360.164-3610-320.190-3212-280.216-281/4-280.250-281-121.000-12底孔d3.1NC 美制粗螺纹 60度NF 美制细螺纹 60度UNC 英寸制统一粗螺纹 60度UNF 英寸制统一细螺纹 60度BSW 英制惠氏粗螺纹 55度3.84.355.723.7