螺丝攻牙钻孔径和滚造径对照表

螺丝攻牙钻孔径和滚造径对照表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M1.0×0.250.750.7850.729NO.1-64(1.854)1.55