Hellermanntyton metallic conduit fittiings with metallic overbraid pcsb fm hellermann tyton 166 33811 the hellermanntyton 166 33811 pcsb12 is a conduit fitting with an pg21 fixed external thread for metallic conduit from the pcsb fm series the fitting comprises of two parts the shell and the body the connector has been manufactured from nickel plated brass hellermanntyton 166 33811 pcsb25 fm pg21 conduit fitting ip54 pg21 211mm