Grease Cap w/ Rubber Plug 5.2k - 7k 6-Bolt Hubs, 2.44" OD - Trailer Parts Unlimited
Grease Cap 2.717" A-Lube 7K #42
1.98' EZ Lube Trailer Hub Dust Cap Grease Cap - China grease cap, trailer grease cap | Made-in-China.com
Trailer Axle Grease Caps | Fits Most 5,200 lb Axles | 2.44" OD - Galvanized | eBay
Amazon.com: Trailer Bearing Dust Cap 4 Pieces Trailer Axle Grease Cap Wheel Center Caps Lube Grease Covers with 4 Rubber Plugs Replacements for Trailer Wheel Hubs(1.98 Inches for 2,000 to 3,500 lb) : Automotive