Aluminum Weld Bung -12AN Male

The Aluminum Weld Bung -12AN Male from Vibrant Performance is a precision engineered fitting designed for custom fuel system, coolant line, and hydraulic fluid applications where reliable port sealing and integrated mounting are essential. This weld-on bung serves as a permanent integration point in high-performance automotive systems, allowing technicians and fabricators to establish clean, leak-proof connections without relying on bolt-through ports. Used extensively in custom fuel cell installations, race car builds, and aftermarket cooling system modifications, this component eliminates the need for temporary caps or adapter fittings during system assembly and testing.

Constructed from lightweight aluminum and rated for -12AN (12/16-inch) male thread specification, this fitting features a 1-3/8 inch weld flange that distributes heat and stress evenly across the mounting surface during welding operations. The natural aluminum finish provides excellent corrosion resistance in standard automotive environments while remaining easy to identify and service. The male -12AN thread design accepts standard aftermarket hose fittings, adapters, and line connectors commonly found in fuel delivery, cooling, and pressure systems, ensuring broad compatibility with existing platform infrastructure and aftermarket component ecosystems.

Fabricators, engine builders, and fuel system specialists benefit most from this bung when designing custom fuel cells, modifying reservoir tanks, or installing auxiliary cooling circuits on performance vehicles. Installation requires direct welding to aluminum, steel, or composite tank walls—a process that demands proper surface preparation and appropriate welding technique to ensure structural integrity and fluid containment. The compact 0.04 lb weight and minimal footprint make this an ideal choice for weight-conscious applications where every pound matters, such as motorsports, track-day vehicles, and custom fabrication projects requiring professional-grade fluid management solutions.