The Camco 50-Amp Power Grip Threaded Locking Ring is a replacement part for any power cord head that has lost or broken its existing locking ring. It helps create a weatherproof connection. The angled face of the threaded locking ring allows for easy replacement on an existing locking power cord head. Once the locking ring has been pressed on, the locking ring cannot be removed. Made out of black polycarbonate material. Overall diameter measures 3-inches.