... rail support, steel sleeper, rail anchor, track rod, gauge plate, nylon yarn, rubber foot.2 Standard componentsA: Hex bolt, square bolt ... , split pin4 Anti-loosen Fasteners Various nuts and bolts (Nylon anti-loosen, mechanical anti-loosen, screw anti-loosen types) ... power, etc. 6 Mechanical processing components thread spinner fittings, auto fittings, and full set of special equipments, etc. Standards ...