Product Description
This is a used screw on grease cap for vintage 12" hubs, both 5 lug and 6 lug. The outside diameter is 2-7/8" and it is 1-3/4" tall. The inside diameter is approximately 2-5/8". It has surface rust or paint but is still in good usable shape. These grease caps were used on Spartan, Airstream and many other vintage trailers.
