Moroso Weld-On NPT Bung Fitting

The Moroso Weld-On NPT Bung Fitting is a female-threaded weld-in bung for adding NPT ports to fabricated parts. Fabricators and racers use it to add oil, fuel, coolant, and water ports, and to mount sensors, gauges, and probes. Typical places for these ports are oil pans, tanks, radiators, headers, exhaust systems, and custom fluid-handling projects. It is also called a weld bung, weld-in port, or NPT weld fitting.

Key Features:

• Female NPT threads accept standard NPT fittings, plugs, adapters, and sensors
• Weld-on design gives a permanent, leak-resistant connection when welded correctly
• Machined for consistent thread quality and a clean fit to the mounting surface
• Works with custom fabrication, repairs, and performance builds
• Made by Moroso, a long-established name in racing and performance parts

Use a weld-compatible material and proper welding technique. Clean the threads and surrounding area after welding, and confirm the threads are clear before installing a fitting. Choose the variant that fits your port size and application.