This threaded plug is designed to fit Cummins Engine models KTA38, QSK38, QSK50, and QST30. It is manufactured in China and comes as a single unit. This plug is perfect for those looking to maintain or repair their engine without having to replace the entire unit. It is important to ensure that this threaded plug is compatible with your specific engine model before purchasing. It can be used in a variety of applications, including commercial truck parts. Don't miss out on the opportunity to enhance the performance of your engine with this high-quality threaded plug.