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1、螺纹规格及攻丝底孔对照表螺纹规格钻头直径1.25M2 X0.41.62.05M3 X0.52.52.9M4 X0.73.3M5 X0.84.2M6 X15M8 X1.256.8M8 X17M10 X1.58.5M10 X1.258.8M12 X1.7510.2M12 X1.5010.5M12 X1.2510.8M14 X212M14 X1.512.5M16 X214M16 X1.514.5M18 X2.515.5M18 X1.516.5M20 X2.517.5M20 X1.518.5M22 X2.519.5M22 X1.520.5M24 X321M24 X222M27 X324M27 X225
2、M30 X3.526.5M33 X3.529.3M36 X431.8M39 X434.8M42 X4.537.3螺纹底孔直径 公制粗牙螺纹螺纹代号钻头直径HSS硬质合金M20.41.61.65M30.52.52.55M40.73.33.4M50.84.24.3M61.05.0 5.1M81.256.86.9M101.58.58.7M121.7510.310.5M142.012.0 12.2M162.014.0 14.2M182.515.515.7M202.517.517.7M243.021.0 M303.526.5M364.032.0 M424.537.5M454.540.5M485.043.
3、0 细牙螺纹 螺纹代号钻头直径铝硬质合金M20.251.751.75M30.352.72.7M40.53.53.55M50.54.54.55M60.756.3 6.35M81.077.1M80.757.37.35M101.099.1M101.258.88.9M100.759.39.35M121.510.510.7M121.2510.810.9M121.01111.1M141.512.5 12.7M141.013.0 13.1M161.514.5 14.7M161.015.0 15.1M181.516.516.7M181.01717.1M202.01818.3M201.518.518.7M201
4、.01919.1M242.022.0 M241.522.5 M241.023.0 M30327M30228M301.528.5M301.529M363.033.0 M36234.0 M361.534.5 M42438M42339M42240M421.540.5M45441M45342M45243M451.543.5螺纹粗 牙细 牙M10.250.2M1.10.250.2M1.60.350.2M20.40.25M2.50.450.35M30.50.35M40.70.5M50.80.5M610.75, (0.5)M81.251, 0.75, (0.5)M101.51.25, 1, 0.75, (0
5、.5)M121.751.5, 1.25, 1, (0.75), (0.5)(M14)21.5, 1.25, 1, (0.75), (0.5)M1621.5, 1.25, 1, (0.75), (0.5)(M18)2.52, 1.5, 1.25, 1, (0.75), (0.5)M202.52, 1.5, 1.25, 1, (0.75), (0.5)(M22)2.52, 1.5, 1.25, 1, (0.75), (0.5)M2432, 1.5, 1, (0.75)(M27)32, 1.5, 1, (0.75)M303.53, 2, 1.5, 1, (0.75)(M33)3.5(3), 2, 1
6、.5, 1, (0.75)M3643, 2, 1.5, (1)(M39)43, 2, 1.5, (1)M424.5(4), 3, 2, 1.5, (1)(M45)4.5(4), 3, 2, 1.5, (1)M485(4), 3, 2, 1.5, (1)(M52)5(4), 3, 2, 1.5, (1)M565.54, 3, 2, 1.5, (1)(M60)5.54, 3, 2, 1.5, (1)M6464, 3, 2, 1.5, (1)(M68)64, 3, 2, 1.5, (1)M7264, 3, 2, 1.5, (1)(M76)64, 3, 2, 1.5, (1)M8064, 3, 2, 1.5, (1)螺纹螺距（粗牙、细牙）对照表