Steel Weld Bung Female 1/2 NPT

The Steel Weld Bung Female 1/2 NPT is a robust threaded fitting designed for applications requiring permanent, pressure-rated connections in fluid transfer systems. Purpose-built for welding into manifolds, tanks, and custom fabrications, this bung serves technicians, fabricators, and hydraulic specialists who need reliable port closure or fuel system integration. The female NPT design accepts male-threaded adapters, hoses, and gauges, making it essential for leak-free assembly in automotive, industrial, and fluid-handling environments where vibration and pressure demand unwavering integrity.

Manufactured from steel and finished in a natural state, this weld bung is engineered for permanent mounting via full-penetration welding to substrates, eliminating thread stripping and connection failure. The 1/2 inch NPT (National Pipe Thread) female port conforms to ANSI standard thread geometry, ensuring compatibility with any male NPT fitting in that size class. Steel construction delivers superior durability over brass or aluminum alternatives, withstanding high-pressure cycling, thermal stress, and corrosive fluid exposure. The compact footprint—measuring 1.85 x 1.3 x 4.1 inches and weighing just 0.17 lbs—allows integration into tight-tolerance manifold designs without compromising structural integrity.

Hydraulic fabricators, fuel system builders, and engine bay engineers benefit most from this fitting's weld-on design, which eliminates loose connections in high-vibration or high-pressure service. Installation requires welding to a steel substrate; no threading or tapping required—a significant advantage in custom applications where port orientation or location demands precision. The FRAGOLA brand backing ensures OEM-grade metallurgy and dimensional consistency, critical for systems operating above 1000 PSI or in temperature-cycling duty. Verify your welding capability and substrate material compatibility before purchase to ensure optimal fusion and pressure retention.