NPT Female Weld Bung 3/4in-14 Aluminum

The ALLSTAR PERFORMANCE NPT Female Weld Bung 3/4in-14 Aluminum (ALL 50744) is a precision-engineered welding bung designed for custom fluid system applications in racing, fabrication, and specialty automotive builds. This aluminum weld-on bung provides a threaded NPT female port for secure attachment of sensors, gauges, or fluid lines where permanent installation is required.

Manufactured to 3/4-inch NPT (National Pipe Thread) female specifications, this bung accepts standard 3/4-inch NPT male fittings with consistent sealing geometry across all major manufacturers. The aluminum construction delivers a lightweight solution while maintaining adequate strength for pressure applications. The weld-on design—rather than bolt-on or threaded insertion—ensures a permanent, leak-proof integration once properly welded into tank or manifold walls. Natural finish aluminum can be painted or anodized to match tank aesthetics or protective requirements.

This bung is widely used in fuel system fabrication, coolant system modification, and custom oil reservoir builds where a threaded port is needed at a specific location. Builders often weld these bungs into tanks to add sensor bungs, fill ports, or drain provisions without thread-stripping concerns. The NPT female threading accommodates adaptors, ball valves, quick-disconnects, and gauge fittings. It is essential that the mounting surface be properly prepared and the weld performed by qualified technicians to ensure structural integrity and leak prevention.