Hub Grease Cap with a 3.625 Bolt Circle | Mill Supply, Inc.
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
VW Bus Grease cap 211405691, 211405692 Wagenswest aluminum 1955-63 Bus front - Wagenswest
Grease Cap 2.717" A-Lube 7K #42
Grease Cap w/ Rubber Plug 5.2k - 7k 6-Bolt Hubs, 2.44" OD - Trailer Parts Unlimited
2.44" Grease Caps - Fits Most 5,200 lb Axles
METAL GREASE CAP - 1.980" OD - SURE-LUBE | Load Rite Trailers