... 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 ... yarn, rubber foot.2 Standard componentsA: Hex bolt, square bolt, steel structure bolt, torshear type high strength plain washer, ... hexagon flange bolt, bolt for carriage, handing down bolt, T type bolt, hinged bolt.B: Hex nut, square nut, hex flange nut, ...