内六角螺栓的沉孔及螺栓孔标准尺寸表(用于GB70,单位:毫米)dM1.6M2M2.5M3M4M5M6M8M10M12M14M16M20M24M30M36ds1.622.5345681012141620243036d'1.82.42.93.44.55.56.691113.515.517.522263339dk33.84.55.578.510131618212430364554D'3.34.35681011151820242633404857k1.622.5345681012141620243036H''1.82.32.93.44.65.76.8911131517.521.525.53238d21.21.62.12.53.34.25.26.88.510.512.214.218.221.226.532.2