Product Details: The Meritor 5.5" Oil MTIS Hub Cap is designed to provide superior protection and performance for your vehicle. This hub cap is made from high-quality aluminum and hi-impact poly materials for maximum durability and strength. It features a screw-on design with a plug and gasket or O-ring for easy installation. The poly screw-on caps also come with a vented plug and hub odometer-ready for added convenience. This hub cap is designed to fit TN/TQ axle models with a 5.5" bolt circle diameter and 06 bolt holes. It is approved for use with oil lubricant type. FleetPride is your First Click in Heavy Duty®.