Hellermanntyton brass conduit connector sc sm series hellermann tyton 166 30402 the hellermanntyton 166 30402 sc16 sm m16 is a brass connector for metallic conduit from the sc sm series the connector has a swivel external m16 thread and comprises of two parts the shell and the body the connectors have been nickel plated hellermanntyton 166 30402 sc16 sm m16 brass conduit connector m16 13mm