... bolt ,screw spike with plactic tuber Railway FastenersA: Railway bolt, square head screw spike, T type bolt, 70 rail spike, spiral spike ... plate, nylon yarn, rubber foot.2 Standard componentsA: Hex bolt, square bolt, steel structure bolt, torshear type high strength plain washer ... down bolt, T type bolt, hinged bolt.B: Hex nut, square nut, hex flange nut, slotted nut, high strength nut for ...