... FastenersA: Railway bolt, square head screw spike, T type bolt, 70 rail spike, spiral spike, ... dog spike, turnout spike.B:Elastic bar, lock washer, fishplate, rail support, ... bolt for carriage, handing down bolt, T type bolt, hinged bolt.B: Hex nut, square nut, hex ... of special equipments, etc. Standards for railway products: T B, UIC , AREA, etc. Standards for standard components: ...