Dexter Fortress Threaded Aluminum Oil Cap, 5,200 lbs – 8,000 lbs, K21-303-00 This Fortress aluminum oil cap is designed to fit 5,200-8,000 lb. axles. Whether you are using oil or grease, this cap will help keep your bearings lubed. The Fortress aluminum oil caps are engineered and designed by Dexter as a bona-fide superior bearing protection solution for trailer axles. Increase the life of your trailer, by only using Dexter’s top of the line, durable, quality replacement parts. The large side fill/drain plug allows for easy maintenance of your trailer. Compatible with Dexter, Rockwell, and Lippert axles. Replacement For: Dexter- K71-038-00, 021-035-00, K21-297-00, 021-8001 Rockwell- 8001 Valcrum- ST-2875-AM Lippert- 695814
