... , two-end spike, dog spike,sharp-end spike and s hex head screw spike(screw spike)A: B:Elastic bar, lock washer ... rod, gauge plate, nylon yarn, rubber foot.2 Standard componentsA: Hex bolt, square bolt, steel structure bolt, torshear type high strength ... down bolt, T type bolt, hinged bolt.B: Hex nut, square nut, hex flange nut, slotted nut, high strength nut for bolt ...