... , 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 ... plain washer, high strength bolt for bridge, stud, timber spike, hexagon flange bolt, bolt for carriage, handing down ...