The STEMCO 5-1/2" 6-hole oil hub cap features a six-hole design that provides enhanced stability and secure attachment, ensuring the cap stays firmly in place. This hub cap comes equipped with a side fill plug design, allowing for easy oil maintenance and top-offs, ensuring proper lubrication. It is resistant to corrosion, effectively extending the lifespan of both the cap and hub. Designed for optimized integration with oil bath systems, it helps to keep hubs running smoothly by enhancing lubrication retention, reducing wear and tear on hub components.