Hellermanntyton fittings for metallic conduit and metallic overbraid scsb fm hellermann tyton 166 34610 the hellermanntyton 166 34610 scsb12 is a metallic conduit connector with a fixed external thread from the scsb fm series the fitting comprises of two parts the shell and the body the pg21 connector has been manufactured from nickel plated brass hellermanntyton 166 34610 scsb25 fm pg21 conduit fitting pg21 211mm