... hex head screw spike,screw spike,variable thread screw spike, drive spike, two-end spike, dog spike,sharp-end spike and s hex head screw spike(screw ... 2 Standard componentsA: Hex bolt, square bolt, steel structure bolt, torshear type high strength plain washer, high strength bolt for ... type bolt, hinged bolt.B: Hex nut, square nut, hex flange nut, slotted nut, high strength nut for bolt. 3 Fastener ...