supply hex head 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:Elastic ... plate, nylon yarn, rubber foot.2 Standard componentsA: Hex bolt, square bolt, steel structure bolt, torshear type ... , etc. Standards for railway products: T B, UIC , AREA, etc. Standards for standard components: GB, DIN, ...