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 an O-ring for a leak proof installation. Ideal for installing
on composites when welding isn't an option or for thinner gauge materials that are either to
fragile to weld, or already have a protective finish. These are a favorite for engine builders looking to add a filling point into a valve cover.
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
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
Proudly made in the USA.