... screw spike,screw spike,variable thread screw spike, drive spike, two-end spike, dog spike,sharp-end spike and s hex head screw spike(screw spike)A: B: ... plain washer, high strength bolt for bridge, stud, timber spike, hexagon flange bolt, bolt for carriage, handing down bolt, ... set of special equipments, etc. Standards for railway products: T B, UIC , AREA, etc. Standards for standard components: GB, ...