... spiral spike, dog spike, turnout spike.B:Elastic bar, lock washer, fishplate, rail support, steel sleeper, rail anchor, track rod ... square bolt, steel structure bolt, torshear type high strength plain washer, high strength bolt for bridge, stud, timber spike, hexagon ... slotted nut, high strength nut for bolt. 3 Fastener Spring washer, flat washer, split pin4 Anti-loosen Fasteners Various nuts and bolts ...