... spike, dog spike,sharp-end spike and so on railway fastener(screw spike)A: B:Elastic bar, lock washer, fishplate, ... bridge, stud, timber spike, hexagon flange bolt, bolt for carriage, handing down bolt, T type bolt, hinged bolt.B: Hex nut, square nut, hex flange ... nut, slotted nut, high strength nut for bolt.3 Fastener Spring washer, flat washer, split pin4 Anti-loosen Fasteners Various ...