... spike, two-end spike, dog spike,sharp-end spike and coach screw (rail fasteners)A: B:Elastic bar, lock washer, ... nylon yarn, rubber foot.2 Standard componentsA: Hex bolt, square bolt, steel structure bolt, torshear type high strength plain washer, high strength ... bridge, stud, timber spike, hexagon flange bolt, bolt for carriage, handing down bolt, T type bolt, hinged bolt.B: Hex nut, square nut, hex ...