... spike, dog spike,sharp-end spike and so on railway fastener(screw spike)A: B:Elastic bar, lock washer, fishplate, rail ... flange nut, slotted nut, high strength nut for bolt.3 Fastener Spring washer, flat washer, split pin4 Anti-loosen Fasteners Various ... full set of special equipments, etc. Standards for railway products: T B, UIC , AREA, etc.Standards for standard components: GB, DIN, ASTM ...