#10 Male Alum Weld Bung w/ 1.0 Dia. Step

The #10 Male Aluminum Weld Bung with 1.0 Diameter Step (SKU FRG499560) is a precision-engineered fuel system component designed for custom automotive fabrication and high-performance engine builds. Whether you're installing aftermarket fuel rails, building a custom fuel delivery system, or modifying an existing fuel line configuration, this aluminum weld bung provides a clean, reliable mounting point. Built by FRAGOLA, a trusted name in performance fuel systems, this component bridges the gap between custom welded fuel system construction and standardized #10 AN fittings, making it an essential piece for serious engine bay modifications.

Constructed from lightweight aluminum, this weld bung features a male #10 AN thread on one end and a 1.0-inch diameter step designed to be welded directly into custom fuel rails, surge tanks, or fabricated manifolds. The stepped design ensures a secure, flush weld surface that minimizes turbulence and maintains system integrity under pressure. The aluminum construction keeps weight minimal—critical in racing and performance applications—while maintaining the durability required for high-flow fuel systems. This precision-machined component ensures proper thread engagement and leak-free connections when paired with standard #10 AN female fittings and adapters.

Fabricators, engine builders, and motorsports enthusiasts rely on this weld bung when constructing custom fuel systems for street rods, race cars, and heavily modified engines. It's ideal for applications where welding provides superior strength and cleanliness compared to threaded ports. Installation requires basic welding skills and a TIG or MIG welder; proper technique ensures the component integrates seamlessly into your fuel system. Compatible with all #10 AN fuel system components, this bung works across domestic and import platforms, making it a versatile choice for any custom fuel system project.