... -end spike, dog spike,sharp-end spike and coach screw (rail fasteners)A: B:Elastic bar, lock ... bolt, steel structure bolt, torshear type high strength plain washer, high strength bolt for bridge, stud, timber ... square nut, hex flange nut, slotted nut, high strength nut for bolt.3 Fastener Spring washer, ... (Nylon anti-loosen, mechanical anti-loosen, screw anti-loosen types)5 Various Standard components: ...