Contact us for available sizes.

Aluminium screw filler cap neck for fitting to a hose. It can also be welded to a tank.
The cap has a knurled outer edge for grip when unscrewing and is supplied with a sealing ring.

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.