... nylon yarn, rubber foot.2 Standard componentsA: Hex bolt, square bolt, steel structure bolt, torshear type high strength plain washer, high strength ... spike, hexagon flange bolt, bolt for carriage, handing down bolt, T type bolt, hinged bolt.B: Hex nut, square nut, hex flange nut, slotted ... , UIC , AREA, etc. Standards for standard components: GB, DIN, ASTM/ANSI, BS, JIS, etc. Package : packed in the ...