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
2" Lubed Dust Cap & Rubber Plug - 1.99" x 1.40" x 1.18" - Qty 1 TruRyde Trailer Bearings Races Seals Caps DC200L-DCRP
2.44" Relube Grease/Dust Cap for 5,200-.6,000lb Trailer Wheel Hubs (4 pcs) DC250L-DCRP: Amazon.com: Industrial & Scientific
Tie Down Trailer Wheel Dust Caps | Wholesale Marine
8 Bolt Dust Cap – GS Trailers | Crank up and Hydraulic Trailer Frames