Excellent produce and as first time buyer was very pleased when the product arrived. Shipment was made to me in Texas via USPS and to me in 2 to 3 days.

Extremely well made the dimensions were perfect no complaints at all would highly recommend it to anyone else and in case anyone else was wondering it does have a gasket/o-ring in the cap to make a perfect seal

These 6061 Billet Aluminum Bung And Caps are great for just about any project. Including rear end differential housings Fill Caps, Valve Cover Fill Caps,  Surge Tank Fill Caps, Coolant Overflow Catch Cans; And Just About Anything You Can Think Of. They Are Not Vented And Come In 5 Different Sizes, See Related Products At Bottom Of This Web Page.

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You can build your own vented version of this cap by drilling a small hole in the center of the cap and welding on a 1/8NPT bung Part# AD38001 on the back side of the cap and threading in a free flow breather part# 1EJT5