螺丝孔距

螺纹规格标准螺距螺纹底孔直径M2粗牙0.41.6细牙0.251.75M2.5粗牙0.452.1细牙0.352.2M2.6粗牙0.452.2细牙0.352.25M3粗牙0.52.6细牙0.352.7M3.5粗牙0.63细牙0.353.2M4粗牙0.73.4细牙0.53.6M5粗牙0.84.2细牙0.54.6M6粗牙15.1细牙0.755.3M8粗牙1.256.8细牙1.17.1M10粗牙1.58.6细牙11.258.9细牙219.1细牙30.759.3M12粗牙1.7510.4细牙11.510.6细牙21.2510.9细牙3111.1M14粗牙212.2细牙11.512.6细牙2113.6M16粗牙214.6细牙2.115.1M18粗牙2.515.7细牙1216.2细牙21.516.6细牙3117.1螺丝的公称直径－螺纹的螺距＝螺纹底孔的直径