7501-1 Oversize timing/drain plug. Acorn

This Colony oversize timing and drain plug is a lifesaver for any mechanic dealing with stripped threads in the crankcase. Featuring a classic acorn head, this 11/16"-16 plug is specifically designed to repair 5/8"-13 holes that have seen better days. It serves as a direct replacement for stripped OEM 704 hex head plugs and OEM 720 timing plugs. This part fits a wide range of vintage iron, including 1938 to 1999 Big Twin models (excluding Twin Cams), 1952 to 2003 K-model and XL Sportsters, and 1938 to 1973 45 inch Side Valve models. If you need the matching tap for the job, look for the complete kit under Colony 512915. It is a simple, high-quality solution to keep your cases sealed and looking sharp.