螺纹加工底孔直径对照表本文件包含内容公制粗螺纹 2 级牙底孔径对照表公制细螺纹 2 级牙底孔径对照表美制粗螺纹 2 级牙底孔径对照表美制细螺纹 2 级牙底孔径对照表公制迫牙丝攻钻孔径对照表美制迫牙丝攻钻孔径对照表美制特细螺纹 2 级牙底孔径对照表英制电器螺纹底孔径对照表英制管螺纹（PS〕底孔径对照表英制管螺纹（PT〕底孔径对照表美制管螺纹（NPT、NPS〕底孔径对照表英制螺纹（UNEF〕底孔径对照表公制螺纹〔滚造径丨底孔径对照表针车用其所长螺纹〔滚造径丨底孔径对照表英制圆柱管螺纹（55 度〕加工一览表英制锥管螺纹（55 度〕加工一览表布锥管螺纹加工一览表美制 UNC、UNF 螺纹参数表惠氏 BSW、BSF 螺纹参数表公制螺纹特殊材质工件加工底孔径对照表非密封管螺纹底孔径对照表英制锥管螺纹和英制锥螺纹攻丝前钻底孔的钻头直径日标英制锥度管螺纹底孔径对照表公制粗螺纹规格标准径2 级牙钻孔径最大最小M1.0x0.250.750.7850.729M1.1x0.250.850.8850.829M1.2x0.250.950.9850.985M1.4X0.31.101.1421.075M1.6x0.351.251.3211.221M1.7x0.351.351.4211.321M1.8x0.351.451.5211.421M2.0x0.41.601.6791.567M2.2x0.451.751.8381.713M2.3x0.41.901.9791.867M2.5x0.452.102.1382.013M2.6x0.452.202.2382.113M3.0X0.52.502.5992.459M3.0X0.62.402.4402.280M3.5X0.62.903.0102.850M4.0X0.73.303.4223.242M4.0X0.753.253.3263.106M4.5X0.753.803.8783.688M5.0X0.84.204.3344.134M5.0X0.94.104.1703.930M6.0X1.05.005.1534.917M7.0X1.06.006.1535.917M8.0X1.256.806.9126.647M9.0X1.257.807.9127.647M10X1.58.508.6768.376M11X1.59.509.6769.376M12X1.7510.3010.44110.106M14X2.012.0012.21011.835M16X2.014.0014.21013.835M18X2.515.5015.74415.294M20X2.517.5017.74417.294M22X2.519.5019.74419.294M24X3.021.0021.25220.752M27X3.024.0024.25223.752M30X3.526.5026.77126.211公制细螺纹规格标准径2 级牙钻孔径最大最小M1.0X0.20.800.8210.783M1.1X0.20.900.9210.883M1.2X0.21.001.0210.983M1.4X0.21.201.2211.183M1.6X0.21.401.4211.383M1.7X0.21.451.5001.460M1.8X0.21.601.6211.583M2.0X0.251.751.7851.729M2.2X0.251.951.9851.929M2.3X0.252.052.0612.001M2.5X0.352.202.2212.121M2.6X0.352.202.2462.186M3.0X0.352.702.7212.621M3.5X0.353.203.2213.121M4.0X0.53.503.5993.459M4.5X0.54.004.0993.959M5.0X0.54.504.5994.459M5.5X0.55...
