Hellermanntyton fittings for metallic conduit and metallic overbraid scsb fm hellermann tyton 166 34606 the hellermanntyton 166 34606 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 m40 connector has been manufactured from nickel plated brass hellermanntyton 166 34606 scsb40 fm m40 conduit fitting m40 376mm