AN 12 aluminium

Weld-on AN 12 aluminum bung for clean and secure installations

Connect like a pro—no adapters, no shortcuts

This weld-on AN 12 aluminum bung is exactly what you need when prepping a fuel tank, radiator, or oil reservoir for a high-flow AN setup. Made from quality aluminum and precisely machined, you just weld it in place and fit your AN12 flare fitting—no adapters, no hassle.

What does AN 12 mean and why is it used so often?

The AN standard comes from Army-Navy, originally developed by the U.S. military for highly reliable fluid connections. Over time, its performance brought it from aviation into motorsport. The number 12 means 3/4”, perfect for large flow systems—oil returns, coolant loops or fuel lines in serious performance builds.

Advantages of this AN 12 aluminum bung

• Easy to weld on any aluminum part with standard workshop tools.
• Compatible with AN12 flare fittings, widely used in high-demand fluid circuits.
• Precision-machined for reliable sealing, even under pressure and vibration.
• Compact and lightweight, despite its larger diameter.
• Clean and professional finish that adds both function and visual quality.

Made for serious flow and long-lasting results

Whether you're building a full AN system or upgrading an old setup, this bung makes things easier. Weld it where needed, thread your fitting, and you're done. It’s a solid, no-nonsense solution for high-flow lines in serious builds—no dodgy workarounds or weak links.

Used, trusted, and ready to ship from Weldracingparts

We use the same parts we sell. That means they’ve been tested under real conditions. This AN 12 aluminum bung fits right, seals tight, and holds up. And if you need help, we’re here with real-world support—quick, direct, no fluff.

Know what you need? Add it to your build

If you're ready, throw it in the cart and move forward. Got questions? Reach out. We'll help you weld, connect, and get your setup working exactly how you want it.