AN Weld Bung 4AN Female Aluminum

The AN Weld Bung 4AN Female Aluminum from ALLSTAR PERFORMANCE is a precision-engineered weld-on fitting designed for high-pressure hydraulic and fuel system applications. This 4AN female O-ring port adapter serves as a sealed termination point for fuel lines, brake systems, coolant circuits, and other fluid transfer applications in race cars, street rods, hot rods, and performance vehicles where reliable port closure is critical.

Constructed from lightweight aluminum with a natural finish, this weld bung features an integrated O-ring seal at the 4AN female port, eliminating the need for additional sealing washers or tape at the connection point. The weld-on design allows permanent installation directly into aluminum fuel tanks, radiator tanks, or custom manifolds, providing a clean, leak-free termination without threaded penetrations. Aluminum construction minimizes weight while maintaining adequate strength for typical automotive fluid pressures, making this fitting ideal for weight-conscious builds where corrosion resistance and durability are secondary to performance considerations.

This bung is engineered for buyers assembling custom fuel systems, cooling circuits, or hydraulic brake lines who need a sealed, permanent port solution that won't loosen under vibration or thermal cycling. The 4AN female O-ring port accommodates standard 4AN male connectors and hose fittings, maintaining system compatibility with AN-style plumbing. ALLSTAR PERFORMANCE's reputation in the racing and high-performance automotive market reflects decades of experience supplying fuel system and engine cooling components to professional and amateur builders alike.