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1·Specification of high strength bolts with large hexagon head, large hexagon nuts, plain washers for steel structures.

钢结构用高强度大六角头螺栓，大六角螺母，垫圈技术条件。

2·Steel Series: steel with high strength large hexagon head bolts, torsion shear bolt connections made, the steel truss joints of high strength bolts, studs, drill the end of wire.

钢结构系列：钢结构用高强度大六角头螺栓，扭剪型螺栓连接副，钢网架球节点用高强度螺栓，焊钉，钻尾丝等。

3·Undo hexagon-head bolt on universal joint.

旋开万向节上的六角头螺栓。

4·The connecting screw adopts a bone screw, and the head of the screw is outer-hexagonal, and the nut adopts an expanding hexagon nut or a hexagon nut.

所述连接螺钉采用骨螺钉，螺钉头为外六角。所述螺母采用膨胀六角螺母或六角螺母。

5·Flat-head inner hexagon screws instead the flat-heat cross-screw to increase the required installation and disassembly force.

原有平头十字螺丝改为平头内六角螺丝。以增强安装或拆卸止水栓时的力度需求。

6·Hexagon socket head cap screws with countersunk head screws like.

角紧顶螺钉固定在底座上。