Hellermanntyton brass conduit connector sc sm series hellermann tyton 166 30407 the hellermanntyton 166 30407 sc40 sm m40 is a brass connector for metallic conduit from the sc sm series the connector has a swivel external m40 thread and comprises of two parts the shell and the body the connectors have been nickel plated hellermanntyton 166 30407 sc40 sm m40 brass conduit connector m40 376mm