A universal weld-in drain or fill plug. This is a 2-piece bung that can be welded into anything you like. It uses standard 3/4" NPT threads making it easily adaptable to common pipe fittings. These are the same fittings found on our diff covers. The outside of the plug measures just over 1-1/4", a 1-3/8" hole is perfect for fitting in and having a solid weld. The plug uses a 1/2" square drive.