... dog spike, turnout spike.B:Elastic bar, lock washer, fishplate, rail support, steel sleeper, rail anchor, ... steel structure bolt, torshear type high strength plain washer, high strength bolt for bridge, stud, timber ... high strength nut for bolt. 3 Fastener Spring washer, flat washer, split pin4 Anti-loosen Fasteners Various nuts and ... Standards for standard components: GB, DIN, ASTM/ANSI, BS, JIS, etc.