Hellermanntyton sc pc plain hole connector for metallic conduits nickel plated hellermann tyton 166 30503 the hellermanntyton 166 30503 sc20 is a plain hole conduit connector from the sc pc series the connector acts like a locking device and comprises of two parts the shell and the body without a thread the connector has been manufactured from nickel plated brass hellermanntyton 166 30503 sc20 pc plain hole conduit connector 169mm