... rod, gauge plate, nylon yarn, rubber foot.2 Standard componentsA: Hex bolt, square bolt, steel structure bolt, torshear type high strength ... bolt, T type bolt, hinged bolt.B: Hex nut, square nut, hex flange nut, slotted nut, high strength nut for bolt.3 Fastener Spring washer, flat washer ... , etc.Standards for standard components: GB, DIN, ASTM/ANSI, BS, JIS, etc. the best quailty railway clip