Lippert Premium Threaded Dust Cap with Rubber Plug & O-Ring - 4" Diameter, 10,000-16,000-lb. Axles, Grease #2024055281
This replacement trailer axle premium threaded grease dust cap makes it easy to repair your trailer axle lubrication system. The cap securely installs into your existing hub using a set screw, and it provides a reliable seal with the included O-ring and plug.