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

The FRAGOLA #12 Male Aluminum Weld Bung with 1.0 Inch Step is a precision-engineered fitting designed for custom fuel system fabrication and hydraulic line integration in serious performance builds. This weld bung serves as a termination or branch point in aluminum fuel rails, catch cans, and custom reservoir systems where welded connections offer superior reliability and cleaner aesthetics than threaded alternatives.

Constructed from lightweight aluminum alloy, the #12 male bung features a stepped diameter design with a 1.0-inch step that provides a consistent weld shoulder and ensures proper fitment in ported aluminum components. The male thread configuration allows direct connection to female-ported fuel rails or manifolds, eliminating the need for additional adapters and reducing potential leak points.

FRAGOLA's manufacturing tolerances ensure concentricity and thread accuracy critical for maintaining system pressure integrity—essential when working with fuel injection systems operating at 40–70+ PSI or boost-assisted applications. This fitting is ideal for fabricators and engine builders working on turbocharged, supercharged, or naturally aspirated performance platforms.