螺纹规格及攻丝底孔对比表螺纹规格钻头直径M1。6X0。35Φ1。25M2 X0.4Φ1。6M2.5X0。45Φ2.05M3 X0。5Φ2.5M3.5X0。6Φ2。9M4 X0.7Φ3。3M5 X0。8Φ4.2M6 X1Φ5M8 X1。25Φ6。8M8 X1Φ7M10 X1。5Φ8。5M10 X1。25Φ8。8M12 X1。75Φ10。2M12 X1。50Φ10。5M12 X1.25Φ10。8M14 X2Φ12M14 X1。5Φ12.5M16 X2Φ14M16 X1.5Φ14。5M18 X2.5Φ15。5M18 X1。5Φ16。5M20 X2。5Φ17.5M20 X1.5Φ18.5M22 X2。5Φ19.5M22 X1。5Φ20.5M24 X3Φ21M24 X2Φ22M27 X3Φ24M27 X2Φ25M30 X3。5Φ26。5M33 X3.5Φ29.3M36 X4Φ31。8M39 X4Φ34.8M42 X4。5Φ37.3
