supply railway spike,screw spike,variable thread screw spike, drive spike, two-end spike, dog spike,sharp-end spike and so on railway spike (screw spike)A: B:Elastic bar, lock washer, fishplate, rail support, steel sleeper, rail anchor, track rod, gauge plate, nylon yarn, rubber foot.2 Standard componentsA: Hex bolt, square bolt, steel structure bolt, torshear type high strength plain washer, ...