螺栓螺母使用扳手、套筒规格及套筒外径 螺栓规格 扳手或套筒规格套筒外径 螺帽对边（S）6.3套筒10套筒12.5套筒20套筒25套筒 新标老标d1d2d1d2d1d2d1d2 M35.58.8 12.5M471111 20 M5812.212.213 24M61014.714.714.715.5 M8131417.217.218.519.2 M10161719.719.722.22423 25.5 M12181924.724.725.5 M14212228.528.529.229.232.1 40M1624333335.8 M182736.736.739.642.750 M203040.540.543.343.347 M223448.348.351.952