Hellermanntyton brass conduit connector sc sm series hellermann tyton 166 30405 the hellermanntyton 166 30405 sc25 sm m25 is a brass connector for metallic conduit from the sc sm series the connector has a swivel external m25 thread and comprises of two parts the shell and the body the connectors have been nickel plated hellermanntyton 166 30405 sc25 sm m25 brass conduit connector m25 211mm