Image Part Number Description Price Unit
C73-735-B C73-735-B $41.95 Each
C73-736-B C73-736-B $41.95 Each
C73-737-B C73-737-B $41.95 Each
C73-738-B C73-738-B $41.95 Each
C73-739-B C73-739-B $41.95 Each
C73-755-B C73-755-B $44.95 Each
C73-756-B C73-756-B $44.95 Each
C73-757-B C73-757-B $44.95 Each
C73-758-B C73-758-B $44.95 Each
C73-759-B C73-759-B $44.95 Each
C73-775-B C73-775-B $51.95 Each
C73-776-B C73-776-B $51.95 Each
C73-777-B C73-777-B $51.95 Each
C73-778-B C73-778-B $51.95 Each
C73-779-B C73-779-B $51.95 Each

Bolt-On Bung and Cap Assembly

The Pro-werks Bolt-on fill assembly requires no welding, this delivers a very clean finished look. The base of the bung is machined to accept the provided O-ring for a leak proof installation. Ideal for installing on composites when welding isn't an option and for thinner gauge materials that are either to fragile to weld, or an installation that already has a protective finish.

These are a favorite for engine builders looking to add a filling point into a valve cover.

The lightweight, non-vented Easy Turn fill cap features positive grip finger notches that is easy to get a hold of. The 6061-T6 billet aluminum cap is CNC machined for accuracy with a lightweight, attractive design and features quick-starting coarse threads. Each assembly includes mounting hardware and a special positive sealing "radial squeeze" Buna O-Ring, which also holds the cap secure.

Billet aluminum Fill Caps are a Pro-werks specialty!

Easy Turn Fill Caps are available in variety of sizes to fit most any application, big or small. To compliment the color coordination of your project, the caps are finished off in Pro-werks Brilliance anodized colors in your choice of  black, red, blue, silver, or beautifully Micro-polished aluminum and the finishes are impeccable.

You can always count on Pro-werks to do it right!

Proudly made in the USA.