AN Weld-on Bungs Female Thread

6061 Aluminum CNC Machined weld-on bung. AN threading from 4AN to 16AN.

Create durable, professional-grade threaded connections with our Aluminum AN Weld-On Bungs (Female Thread). Precision-machined from high-quality aluminum, these bungs offer strength, corrosion resistance, and easy weldability — ideal for performance, racing, and custom fabrication projects.

Each bung features female AN threads, built to the Army–Navy (AN) standard, ensuring compatibility with standard AN flare fittings. This design provides a tight, leak-free seal without the need for thread sealant — perfect for adding fuel, oil, or coolant ports to aluminum tanks, tubing, or manifolds.

Machined for a clean fit and smooth welds, these AN weld-on bungs deliver the reliability and finish demanded by professional fabricators and builders. Available in multiple AN sizes to fit your specific application.