hexagon head

Counterbore for hexagon socket head bolt Mechanical property requirements for studs shall be the same as those for bolts.

柱头螺栓的机械性能要求与螺栓相同。

Counterbore for hexagon socket head bolt

内六角头螺栓埋头孔

Hexagon socket head shoulder screws

GB/T5281-1985内六角圆柱头轴肩螺钉

Hexagon head tapping screw and big washer assemblies

GB/T9074.23-1988六角头自攻螺钉和大垫圈组合件

Hexagon head bolt and single coil spring lock washer assemblies

GB/T9074.15-1988六角头螺栓和弹簧垫圈组合件

Hexagon socket cap head screws

GB/T70-1985内六角圆柱头螺钉

This paper introduces analysis on cracks in hexagon socket head bolts of ML35 ( B) cold heading steel wire rod which is made in Hangzhou Iron& Steel Group Company.

杭州钢铁集团公司生产的ML35（B）冷镦钢盘条，在镦制内六角螺栓时发生了开裂现象。