Steel Weld In Bung Large

The Steel Weld In Bung Large from ALLSTAR PERFORMANCE is a precision-engineered filler component designed for welding into fuel tanks, reservoirs, and custom fabrication projects requiring a sealed, threaded access point. Engineered for motorsports, automotive restoration, and industrial applications, this weld-on bung provides a permanent, leak-proof solution where reliability and durability are non-negotiable. The large format accommodates substantial flow rates and serves as a critical integration point in fuel system assembly, tank repairs, and custom builds where standard threaded connections fall short.

This weld-in bung features a 3.000-inch internal diameter with full threading to accept compatible hose fittings, fuel pumps, senders, and accessory components. Constructed from durable steel with a natural finish, the bung withstands high-temperature welding processes and maintains structural integrity in demanding fuel system environments. The weld-on design allows fabricators and technicians to position the bung precisely within the tank wall, then secure it permanently via MIG, TIG, or stick welding—eliminating reliance on unreliable adhesives or mechanical fasteners that can fail under vibration or thermal cycling.

Ideal for street rod builders, race teams, restoration shops, and OEM fabricators, the Steel Weld In Bung Large is the industry-standard choice for custom fuel tank construction and aftermarket tank modifications. Installation requires basic welding equipment and skills; preparation involves cleaning the tank wall, positioning the bung, and running a full-perimeter bead to ensure a hermetic seal. Sold as a single unit, this bung delivers the dimensional stability and threading precision that professional shops demand when building tanks for carburetors, EFI systems, electric fuel pumps, and auxiliary fuel cells. Compatible with universal 3.000-inch port requirements across nearly all custom automotive applications.