... fish plate supporting the UIC track bolts and square bolts; To TJ45; TJ57; BS60; BS75 fish ... bolt, subway Bolts. Nut: nylon nut, lex nut, square nut, heavy and normal. 2) Specification: 4.6 ... / clamp bolt / track bolt 1) Type: hex head, square head, flange head used DIN, BS, and AREA standard 2) Specification: ... sleeper screw/ dog spikes 1) Type: Ss series square spikes remain Ss5; ss8; ss25; ss36, all ...