2.45" (2 7/16") Grease Cap - Grease Caps - Grease Caps/Dust Caps - Hubs, Drums, Bearings, & Parts - Products
Carry-On Trailer 2 in. EZ Lube Dust Cap, 2,990 lb. at Tractor Supply Co.
Amazon.com: Trailer Bearing Dust Cap Wheel - Trailer Axle Grease Cover 1.98" with Extra 2 Rubber Plugs, Bearing Center Replacement Trailer Cup, Trailer Hub Grease Cap for 2000 to 3500 Ib Axles