螺丝攻牙表[1]
螺丝攻牙钻孔径和滚造径对照表(一)公制粗螺纹美制粗螺纹规格标准径2级牙钻孔径规格(UNC)标准径2级牙钻孔径最大最小最大最小M3.0*0.52.52.5992.459No6 -322.82.895
螺丝攻牙表[1]