The STEMCO 5-1/2" 6-hole grease/oil hub cap offers an efficient solution for monitoring lubricant levels with its transparent window, facilitating visual checks. Its hole flange pattern ensures secure and stable mounting. The hub cap is crafted to withstand high operating temperatures, supporting sustained performance in challenging conditions. It is compatible with both grease and oil lubrication systems, enhancing versatility. Finally, the precision fit reduces contamination risks, thus improving overall hub protection for its vehicles.