国标沉头螺钉孔

M1.6M2M2.5M3M3.5M4M5M6d2(H13)3.74.55.66.48.49.610.612.8t11.21.51.62.42.72.73.3d1(H13)1.82.42.93.43.94.55.56.6M4M5M6M8M10M12M14M16M20M24M30M36平头螺丝沉头孔尺寸螺纹规格d螺纹规格d使用于GB/T70适用于沉头螺钉及半沉头螺钉内六角沉头孔尺寸M4M5M6M8M10M12M14M16M20M24M30M36d2(H13)8911151820242633404857t55.5791113151822263238d1(H13)55.57911131517.522263339M4M5M6M8M10M12M14M16M20M24M30M36d13.44.35.16.88.510.212.113.617.521.526.532螺纹规格螺纹规格d使用于GB/T70普通螺纹打底孔的孔径尺寸