12-0623 - Engine Case .619 Welch Plug

Engine case .619 cam cover Welch plug. Welch plug is used to seal passages created for internal oiling on oil pump body and engine case. The welch plug expands for a permanent seal when hit with dull punch plugs are not reusable. Check the outer diameter of the plug before installation. The welch plug are what the Harley-Davidson factory used for many years. Welch plugs manufactured since 1909 in the U.S.A.