螺 丝 攻 牙 钻 孔 径 和 滚 造 径 对 照 表公制粗螺纹规格M1.0*0.25M1.1*0.25M1.2*0.25M1.4*0.3M1.6*0.35M1.7*0.35M1.8*0.35M2.0*0.4M2.2*0.45M2.3*0.4M2.5*0.45M2.6*0.45M3.0*0.5M3.0*0.6M3.5*0.6M4.0*0.7M4.0*0.75M4.5*0.75M5.0*0.8M5.0*0.9M6.0*1.0M7.0*1.0M8.0*1.25M9.0*1.25M10*1.5M11*1.5M12*1.75M14*2.0M16*2.0M18*2.5M20*2.5M22*2.5M24*3.0M27*3.0M30*3.5标准径0.750.850.951.11.251.351.451.61.751.92.12.22.52.42.93.33.253.84.24.1566.87.88.59.510.3121415.517.519.5212426.52级牙钻孔径最大最小0.7850.7290.8850.8290.9850.9291.1421.0751.3211.2211.4211.3211.5211.4211.6791.5671.8381.7131.9791.8762.1382.0132.2382.1132.5992.4592.442.283.012.853.4223.2423.3263.1063.8783.6884.3344.1344.173.935.1534.9176.1535.9176.9126.6477.9127.6478.6768.3769.6769.37610.44110.1112.2111.8414.2115.74417.74419.74421.25224.25226.77113.8415.2917.2919.2920.7523.7526.21规格M12*1.0M12*0.5M14*1.5M14*1.0M15*1.5M15*1.0M16*1.5M16*1.0M17*1.5M17*1.0M18*2.0M18*1.5M18*1.0M20*2.0M20*1.5M20*1.0M22*2.0M22*1.5M22*1.0M24*2.0M24*1.5M24*1.0M25*2.0M25*1.5M25*1.0M26*1.5M27*2.0M27*1.5M27*1.0M28*2.0M28*1.5M28*1.0M30*3.0M30*2.0M30*1.5M30*1.0M32*2.0M32*1.5M33*3.0M33*2.0M33*1.5M35*1.5M36*3.0M36*2.0M36*1.5公制细螺纹标准径1111.512.51313.51414.51515.5161616.5171818.5192020.5212222.5232323.52424.52525.5262626.527272828.5293030.5303131.533.5333434.52级牙钻孔径最大最小11.15310.91711.5211.412.67612.37613.15312.91713.67613.37614.15313.91714.67614.37615.15314.91715.67615.37616.15315.91716.2115.83516.67616.37617.15316.91718.2117.83518.67618.37619.15318.91720.2119.83520.67620.37621.15320.91722.2121.83522.67622.37623.15322.91723.2122.83523.67623.37624.15323.91724.67624.37625.2124.83525.67625.37626.15326.2126.67627.15327.25228.2128.67629.15330.2130.67630.25231.2131.67633.67633.25234.2134.67625.91725.83526.37626.91726.75227.83528.37628.91729.83530.37629.75230.83531.37633.37632.75233.83534.376规格M1.0*0.25M1.1*0.25M1.2*0.25M1.4*0.3M1.6*0.35M1.7*0.35M1.8*0.35M2.0*0.4M2.2*0.45M2.3*0.4M2.5*0.45M2.6*0.45M3.0*0.5M3.5*0.6M4.0*0.7M5.0*0.8M6.0*1.0M7.0*1.0M8.0*1.25M10*1.5M10*1.25M12*1.75M12*1.25无沟丝攻钻孔径精度等级G4—G6G7—G80.860.880.960.981.061.081.241.251.411.431.511.531.611.631.781.81.951.982.082.12.252.282.352.382.732.753.173.23.623.654.564.65.455.56.456.57.317.389.189.259.319.3811.0411.1211.3111.38G9——————————————3.694.645.556.557.449.329.4411.2111.44规格No.2-56UNCNo.3-48No.4-40No.5-40No.6-32No.8-32No.10-24No.12-241/4 --205/16--183/8 --167/16--141/2 --13No.2-64UNFNo.3-56No.4-48No.5-44No.6-40No.8-36No.10-32No.12-281/4 --285/16 --243/8 --247/16 --201/2 --20无沟丝攻钻孔径G4—G61.942.232.52.833.073.734.244.9—————1.972.272.562.863.163.784.394.995.857.36———精度等级G7—G8—————3.774.34.965.727.248.7410.211.27——————4.435.045.97.41910.4812.07G9——————————8.8110.311.82———————————10.5412.13注：无槽沟丝攻之钻径，在上表所列之数值，由于被加工材料之材质、硬度、形状、尺寸等之影响，多少会有所变动，因此于参考上表之同时，亦请增减若干。英制管螺纹美制粗螺纹规格（UNC）（番数牙外径）No.1 -64(1.854)No.2 -56(2.184)No.3 -48(2.515)No.4 -40(2.845)No.5 -40(3.175)No.6 -32(3.505)No.8 -32(4.166)No.10-24(4.826)No.12-24(5.486)1/4 --205/16--183/8 --167/16--141/2 --139/16--125/8 --113/4 --107/8 --91 --81- 1/8 - 71- 1/4 - 71-3/8-61-1/2-61-3/4-52-4-1/2标准径1.551.82.12.32.62.83.43.94.55.16.689.410.812.213.616.519.522.22528.230.83439.545.22级牙钻孔径最大最小1.5821.8712.1462.3852.6972.8953.533.9624.5975.2576.7318.1539.5511.02312.44612.86818.8419.76122.60625.39428.52431.11534.2939.82745.5931.4521.6951.9412.1572.4872.6423.3023.6834.3444.9796.4017.7989.14410.59211.98913.83616.30719.17721.97124.63827.81330.35333.52838.96444.679规格PS 1/16 - 28PS 1/ 8 - 28PS 1/4 - 19PS 3/8 -- 19PS 1/2 --14PS 3/4 --14PS 1 -- 11PS 1 - 1/4 - 11PS 1 - 1/2 - 11PS 2 -- 11标准径6.58.511.41518.52430.23844.856.5钻孔径最大6.6328.63711.54915.05418.77324.25930.47139.13245.02556.836最小6.498.45911.31414.84618.48923.97530.11138.77244.66556.476公制粗螺纹规格M1.0*0.2M1.1*0.2M1.2*0.2M1.4*0.2M1.6*0.2M1.7*0.2M1.8*0.2M2.0*0.25M2.2*0.25M2.3*0.25M2.5*0.35M2.6*0.35M3.0*0.35M3.5*0.35M4.0*0.5M4.5*0.5M5.0*0.5M5.5*0.5M6.0*0.75M6.0*0.5M7.0*0.75M7.0*0.5M8.0*1.0M8.0*0.75M8.0*0.5M9.0*1.0M9.0*0.75M10*1.25M10*1.0M10*0.75M10*0.5M11*1.0M11*0.75M12*1.5M12*1.25标准径0.80.911.21.41.451.61.751.952.052.22.22.73.23.544.555.35.56.36.577.37.588.38.899.39.51010.310.510.82级牙钻孔径最大最小0.8210.7830.9210.8831.0210.9831.2211.1831.4211.51.6211.7851.9852.0612.2212.2462.7213.2213.5994.0994.5995.0995.3785.556.3786.557.1537.3787.528.1538.3788.9129.1539.3789.5210.15310.37810.6810.911.3831.461.5831.7291.9292.0012.1212.1862.2613.1213.4593.9594.4594.9595.1885.46.1886.47.6177.1887.47.9178.1888.6478.9179.1889.49.91710.1910.3810.65英制管螺纹标准径规格PT 1/16 - 28PT 1/ 8 - 28PT 1/4 - 19PT 3/8 -- 19PT 1/2 --14PT 3/4 --14PT 1 -- 11PT 1 - 1/4 - 11PT 1 - 1/2 - 11PT 2 -- 11使用绞刀时不用绞刀时6.18.110.714.217.6232937.543.454.96.28.21114.51823.529.5384455.5有效牙部之长度（最小）中之毋螺牙内径标准长度（最小）中之毋螺牙内径美制细螺纹规格（UNF）（番数牙外径）No.0-80(1.524)No.1-72(1.854)No.2-64(2.184)No.3-56(2.515)No.4-48(2.845)No.5-44(3.175)No.6-40(3.505)No.8-36(4.166)No.10-32(4.826)No.12-28(5.846)1/4 -- 285/16 -- 243/ 8 -- 247/16 -- 201/2 -- 209/16 --185/8 -- 183/4 -- 167/8 -- 141 -- 121 - 1/ 8 -- 121 - 1/ 4 -- 121 - 3/ 8 -- 121 - 1/2 -- 12标准径1.251.551.852.12.42.72.93.54.14.65.56.98.59.911.512.914.517.520.523.526.529.532.8362级牙钻孔径最大最小1.3051.6121.9122.1972.4582.743.0223.6064.1654.7245.5887.0358.63610.03311.60713.08114.68117.67820.67523.57126.74629.92133.136.271.1821.4741.7562.0252.2712.5512.823.4043.9634.4965.366.7828.3829.79211.32912.75114.35117.32320.2723.11426.28929.46432.6435.816.2448.24910.96214.44817.97923.37829.45937.97643.86955.4126.3848.38811.17414.65818.26323.66329.82238.33944.23255.844美制特细螺纹规格（UNEF）No.12 -- 321/4 -- 325/16 -- 323/8 -- 327/16 -- 281/2 -- 289/16 -- 245/8 -- 243/4 -- 207/8 -- 201 -- 20标准径4.75.67.18.710.211.813.214.817.821242级牙钻孔径最大最小4.8264.6235.695.4867.2647.0878.8658.66110.33810.13511.93811.70913.38613.13214.98614.73217.95817.67821.13320.85324.30824.028美制管螺纹钻孔径N P T使用绞刀时不用绞刀时6.16.25 1/16 - 27 1/8 --278.338.431/4 --1810.7211.13 3/8 -- 1814.2714.271/2 --1417.4817.86 3/4 --1422.6323.01 1 -- 11 - 1/228.5828.981 - 1/4 - 1137.3137.691 - 1/2 - 1143.6644.04 2 -- 11 - 1/255.5855.96规格N P S6.358.7411.1314.6818.2623.4229.3638.144.4556.36