... , two-end spike, dog spike,sharp-end spike and s hex head screw spike(screw spike)A: B:Elastic bar, lock washer ... foot.2 Standard componentsA: Hex bolt, square bolt, steel structure bolt, torshear type high strength plain washer, high strength bolt for bridge, stud ... , T type bolt, hinged bolt.B: Hex nut, square nut, hex flange nut, slotted nut, high strength nut for bolt. 3 Fastener Spring ...