如想学习更多非标设计知识，请看上方购物车，两万多套非标设计图纸及模型，包含各行各业无屑丝攻钻孔径规格精度等级RH4.5.6RH7.8RH9M1.0×0.250.860.88-M1.1×0.250.960.98-M1.2×0.251.061.08-M1.4×0.31.241.25-M1.6×0.351.411.43-M1.7×0.351.511.53-M1.8×0.351.611.63-M2.0×0.41.781.80-M2.2×0.451.951.98-M2.3×0.42.082.10-M2.5×0.452.252.28-M2.6×0.452.351.38-M3.0×0.52.732.75-M3.0×0.63.173.20-M4.0×0.73.623.653.69M5.0×0.84.564.604.64M6.0×1.05.455.505.55M7.0×1.06.456.506.55M8.0×1.257.317.387.44M10×1.59.189.259.32M10×1.259.319.389.44M12×1.7511.0411.1211.21M12×1.2511.3111.3811.44注：无槽丝攻之钻孔径,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，因此参考上表之同时,亦请增减若干。
美制螺纹滚造径规格钻孔径NPTNPS使用绞刀时不用绞刀时1/16 -276.16.256.351/8 -278.338.438.741/4 -1810.7211.1311.133/8 -1814.2714.2714.681/2 -1417.4817.8618.263/4 -1422.6323.0123.421 -11-1/228.5828.9829.361-1/4-11-1/237.3137.6938.11-1/2-11-1/243.6644.0444.452 -11-1/255.5855.9656.36英制螺纹滚造径规格滚造径W 3/16 - 244.08 - 4.05W 1/4 - 205.51 - 5.46W 5/16 - 187.01 - 6.95W 3/8 - 168.48 - 8.41W 7/16 - 149.92 - 9.85W 1/2 - 1211.31 - 11.24W 9/16 -1212.89 - 12.82