RaceFlux Female O-ring Boss Aluminum Weldable Bung

Build an O-ring boss port anywhere you can weld: this bung welds into aluminum pans, tanks, and catch cans, leaving behind a female straight-thread ORB port that seals male ORB fittings on their O-rings — no sealant, reliable resealing, and the flexibility to swap fittings later without touching the weld. Machined from 6061-T6 aluminum in a plain, weld-ready finish.

Key Features

• Weld-in bung with female O-ring boss (ORB) straight-thread port
• Accepts any male ORB fitting — swap adapters without rewelding
• 6061-T6 aluminum in plain finish, ready to weld to aluminum components

Fitment & Compatibility

• Select your ORB size from the dropdown
• For welding to aluminum components: oil pans, catch cans, dry sump tanks, fuel cells

Note: Aluminum bungs weld to aluminum only. Pair with RaceFlux male ORB adapters and hose-end-to-ORB fittings.