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National · Brakes & Wheel End
NAT343-352
In stock · ships from Knoxville
This is a heavy-duty hub cap designed for oil-bath trailer axles.
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Verified fitment for 2 applications
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Other applications
Other applications
Confirm your hub's bolt circle and bolt count before ordering. The 6.75" Unimount variant is typical of many dry van and reefer semi-trailer axles.
Part data verified against 4 catalog sources
Numbers this part supersedes or interchanges with. Showing 1 of 1.
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It includes a side fill plug for easy oil level checks and refills, and three vent caps to balance internal pressure. Commonly used on semi-trailer axles to protect wheel bearings and prevent lubrication-related failures. This hub cap is available in both 6.75" Unimount and 5.5" standard six-bolt patterns.
Part Number: NAT343-352
PSI HUBCAP
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside brakes & wheel end
