NPT Weld-on Bungs - Multiple Thread Sizes

Create secure, leak-free threaded connections with our precision CNC-machined NPT Weld-On Bungs. Designed for professional fabricators and performance builders, these bungs provide a clean, durable way to add ports for sensors, fittings, or drain lines on metal tanks, tubing, and intake or intercooler systems.

Each bung is machined for accurate NPT taper fit and smooth threading, ensuring a tight seal under pressure and vibration. Made from high-quality aluminum, they’re ideal for custom turbo plumbing, oil systems, and any application requiring a strong, reliable threaded boss. NPT (National Pipe Taper) threads provide a tight, leak-free seal for pressure systems.

Welds easily to aluminum tubing and integrates perfectly into your performance build. Available in multiple NPT sizes to fit your exact setup.

1/8" NPT, 1/4" NPT, 3/8" NPT, 1/2" NPT, 3/4" NPT, 1" NPT