... matching the track bolts. Railway bolt: T bolt, HS26, HS32 series T bolt, turnout, hex bolt, flange bolt, subway Bolts. Nut: nylon nut, lex nut, square nut, heavy and normal. 2 ... . High Strength Fish Bolt/ clip bolt / clamp bolt / track bolt 1) Type: hex head, square head, flange head used DIN, BS, and AREA standard 2) Specification ...