Hellermanntyton fittings for metallic conduit and metallic overbraid scsb fm hellermann tyton 166 34602 the hellermanntyton 166 34602 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 m20 connector has been manufactured from nickel plated brass hellermanntyton 166 34602 scsb16 fm m20 conduit fitting m20 13mm