AN 20 aluminium

Weld-on AN 20 aluminum bung for clean and secure installations

Connect like a pro—no adapters, no shortcuts

This weld-on AN 20 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 AN20 flare fitting—no adapters, no hassle.

What does AN 20 mean and why is it used so often?

The AN standard comes from Army-Navy, originally developed by the U.S. military to ensure highly reliable connections in extreme environments. Over time, its effectiveness brought it from aviation to motorsport. The number 20 stands for 1.25", ideal for very high-flow systems such as large oil returns, cooling systems, or fuel delivery in modified high-performance vehicles.

Advantages of this AN 20 aluminum bung

• Easy to weld onto any aluminum part with standard tools.
• Compatible with AN20 flare fittings, widely used in high-demand fluid systems.
• Precision-machined for reliable sealing with no leaks, even under pressure.
• Compact and lightweight, even for large diameter fluid lines.
• Clean, professional finish, functional and visually appealing.

Designed for high-flow systems and maximum reliability

Whether you're building a new AN system or upgrading an existing one, this bung makes the job easier and guarantees a clean, reliable result. Weld it where needed, thread the fitting, and you're done. A solid, direct solution for high-flow lines in modified cars—no improvisations, no adapters.

Used, trusted, and ready to ship from Weldracingparts

We use the same parts we sell, and that makes all the difference. This AN 20 aluminum bung is the real deal: it fits well, holds up under pressure, and installs without complications. And if you need help, you'll get direct support from people who know exactly what they’re doing.

Know what you need? Add it to your build

If you're ready, add it to your cart and move forward. Got questions? Reach out—we’ll help you weld, connect, and get your setup working just the way you want it.