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Knox Trailers · Brakes & Wheel End
PROWH-PL001
In stock · ships from Knoxville
This is a black, vented rubber hubcap plug designed to fit into the fill or inspection hole on heavy-duty truck and trailer axle hub caps.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
It creates a seal to keep dirt, water, and debris out of the wheel end while allowing internal air pressure to equalize and moisture to escape, which helps prevent seal damage and oil contamination. These plugs are commonly replaced when they become cracked, brittle, or lost, which can expose wheel-end components to the elements. If this plug is missing or damaged, it should be replaced immediately to avoid costly bearing failure or brake contamination.
Part Number: PROWH-PL001
HUBCAP PLUG (BLACK,VENTED)
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside brakes & wheel end
