... spike and coach screw (rail fasteners)A: B:Elastic bar, lock washer, fishplate, rail support, steel sleeper, rail anchor, track rod, ... Fastener Spring washer, flat washer, split pin4 Anti-loosen Fasteners Various nuts and bolts (Nylon anti-loosen, mechanical ... -loosen, screw anti-loosen types)5 Various Standard components: Fasteners for motor, diesel engine, mechanical vehicle, petrochemicals, and ...