... , two-end spike, dog spike,sharp-end spike and coach screw (rail fasteners)A: B:Elastic bar, lock washer, fishplate, ... nuts and bolts (Nylon anti-loosen, mechanical anti-loosen, screw anti-loosen types)5 Various Standard components: Fasteners for motor ... Mechanical processing components thread spinner fittings, auto fittings, and full set of special equipments, etc. Standards for railway products: T ...