... plain washer, high strength bolt for bridge, stud, timber spike, hexagon flange bolt, bolt for carriage, handing down bolt, ... high strength nut for bolt. 3 Fastener Spring washer, flat washer, split pin4 Anti-loosen Fasteners Various nuts and bolts ... -loosen, screw anti-loosen types)5 Various Standard components: Fasteners for motor, diesel engine, mechanical vehicle, petrochemicals, and electric ...