... , track rod, gauge plate, nylon yarn, rubber foot.2 Standard componentsA: Hex bolt, square bolt, steel structure bolt, torshear ... anti-loosen, screw anti-loosen types)5 Various Standard components: Fasteners for motor, diesel engine, mechanical vehicle, petrochemicals, and electric power, etc ... products: T B, UIC , AREA, etc. Standards for standard components: GB, DIN, ASTM/ANSI, BS, JIS, etc.