Weld Bung 3/4in NPT Female - Aluminum

The JOES Racing Products Weld Bung 3/4in NPT Female in aluminum is a precision-engineered port plug designed for marine fuel tank systems, engine cooling loops, and fluid transfer applications. This weld-on fitting provides a permanent, leak-free connection point where temporary access or pressure relief is required. The 3/4-inch NPT female threading accepts standard plumbing and fuel system components, making it a versatile solution for both original equipment installations and custom fabrication work.

Manufactured from aluminum, this weld bung combines lightweight construction with corrosion resistance—a critical advantage in salt-air environments where steel fasteners fail rapidly. The female NPT port accommodates standard ball valves, sight glasses, drain plugs, and pressure gauges. Weighing just 0.07 lbs, the compact 3 × 0.8 × 4.1-inch profile fits tight engine compartments without adding bulk. The weld-on design eliminates threading into soft aluminum tank walls, distributing stress across a wider surface area and reducing the risk of thread pull-out under vibration or thermal cycling.

This fitting is ideal for custom marine fuel system builds, vintage restoration projects, and performance engine installations where reliability cannot be compromised. Boaters upgrading fuel storage systems, installing auxiliary cooling systems, or adding drain capabilities on freshwater or saltwater vessels benefit from the permanent installation that avoids future leaks at critical junctures. JOES Racing Products specializes in precision motorsports and marine hardware engineered for demanding environments, and this weld bung reflects that commitment to durability and proper engineering practice.