-12an Male Aluminum Weld-In Fitting

The MEZIERE -12AN Male Aluminum Weld-In Fitting is a precision fluid transfer component designed for custom fuel, coolant, and hydraulic system fabrication. This weld-on aluminum bung accepts 12 AN male hose fittings and is engineered for permanent installation in tank walls, manifold blocks, and custom fuel system applications where reliability and leak-free operation are non-negotiable.

The aluminum construction provides a lightweight alternative to steel bungs while maintaining strength suitable for moderate pressure applications. The 12 AN designation follows industry-standard SAE port sizing, ensuring compatibility with readily available 12 AN hose assemblies, adapters, and fittings. The weld-in design requires TIG or oxy-acetylene welding to a clean, properly prepared surface; once installed, this method creates a permanent, full-strength connection that eliminates fitting fatigue and vibration-induced loosening common in threaded applications. The natural aluminum finish is compatible with most coolants and petroleum-based fluids, though system-specific compatibility should be verified for specialty fluids.

This fitting is ideally suited for fabricators and engine builders constructing custom cooling systems, fuel system modifications, and high-performance hydraulic installations. It serves applications including race vehicle builds, custom truck fuel systems, performance engine conversions, and industrial equipment fabrication where a fixed, sealed connection is preferred over threaded bungs that may loosen under vibration or thermal cycling.

Weld-in bungs represent the permanent-installation standard in competitive motorsports and professional fabrication, offering superior reliability compared to temporary or threaded options. MEZIERE manufactures fluid system components trusted in performance automotive and industrial sectors where system integrity directly impacts safety and function.