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343-4372

HUBCAP PSI

The Stemco 343-4372 is a PSI (Pressure Systems International) hub cap for oil-lubricated wheel ends, featuring a long tube center. It is designed to work with the PSI tire inflation system, protecting wheel bearings and allowing visual oil level checks via a side fill plug and a window with oil fill lines [stemco.com](https://www.stemco.com/product/wheel-end/hub-caps/psi-hub-caps/). You would replace this hub cap when it's damaged, leaking, or during routine wheel end maintenance to prevent contamination and ensure proper lubrication. Seller listings indicate it fits a wide range of heavy-duty trucks, but specific vehicle fitment is not verified by the manufacturer [woffordtruckparts.com](https://www.woffordtruckparts.com/products/brakes-wheel-end/hub-caps/stemco-genuine-oem-343-4372-hub-cap-w/pipe-plug/343-4372). This hub cap is an OEM-quality part from Stemco, a well-known brand in wheel end components.