Which Rubber Plug Fits Redline Trailer Hub Grease Cap 21-43-1?

Question:

why not offer plug with this cap ? Cant easily find plug to order and Im annoyed by prospect of wasting resources to ship such a minuscule item. Is there a couple plugs available?

asked by: Tom

Expert Reply:

The reason the Trailer Hub Grease Cap, 2.72" - Drive-In for E-Z Lube, 5.2-8K Axles - Qty 1 # 21-43-1 you were looking at does not include the rubber plug is because Redline Trailer Parts who makes this cap does not offer it with the plug.

You can however add rubber plugs using the Rubber Lube Plug # DC-RP which is sold as a quantity of one.

I included videos of the products mentioned for you to take a look at.

expert reply by: Samuel C