The SKF Steer 6-Bolt Axle Oil Fill Hub Cap is designed to provide superior sealing and protection for your axle. The cap features an embedded aluminum ring that evenly distributes load, a molded pressure ridge that improves sealing ability, and a patented umbrella style valve seals that keep out contaminants. The side fill plug incorporates an O-ring for extra leak protection and a magnet that traps metallic particles. This hub cap is designed for Ford and Freightliner applications and is the perfect choice for keeping your axle running smoothly. FleetPride is your First Click in Heavy Duty®.