3/8in Alum Weld In Bung

The MOROSO 3/8in Aluminum Weld-In Bung is a precision-engineered port fitting designed for custom fuel system installations, engine modifications, and fluid management applications where a permanent, leak-free connection is required. This weld-on bung features a 3/8 inch NPT female thread and natural aluminum construction, providing a lightweight, corrosion-resistant solution for fabricators and engine builders working with fuel tanks, sumps, and fluid reservoirs.

Aluminum's low density and thermal conductivity make it ideal for applications where weight savings matter and heat dissipation is beneficial. The NPT (National Pipe Tapered) female thread accepts standard 3/8 inch NPT male fittings, hose barbs, or gauge senders, ensuring compatibility with most aftermarket fuel system components and sensors. The weld-in design creates a permanent, solid structural bond when properly welded to aluminum or steel tanks, eliminating the risk of loosening or vibration-induced leaks common with threaded ports on high-performance vehicles. This product ships as a pair, enabling symmetric port placement on dual-tank configurations or redundant system designs.

The 3/8in aluminum weld-in bung is widely used by circle-track racers, drag racing teams, street rod builders, and marine engine specialists installing custom fuel systems, low-pressure fuel rails, return lines, or diagnostic ports. It serves equally well in high-performance automotive builds, off-road vehicle fuel system upgrades, and industrial fluid management systems where a compact, threaded port must be permanently integrated into tank construction. The natural aluminum finish requires standard welding procedures and, once installed, can be painted or powder-coated to match tank aesthetics.