1/2in Female NPT Weld-on Bung Clear

The 1/2in Female NPT Weld-on Bung Clear from REDHORSE PERFORMANCE is a precision fluid-system fitting designed for custom automotive and motorsports applications where you need to integrate gauges, sensors, or auxiliary lines into existing or fabricated fuel, coolant, or brake system piping. As a certified mechanic and modifier, you'll recognize this as essential infrastructure for building clean, professional-grade custom systems—whether you're upgrading to electronic fuel injection, adding a fuel pressure gauge for tuning, installing a transmission cooler, or running custom coolant lines. Bungs serve as welded ports that eliminate the need for bulky inline tees, keeping engine bay layouts compact and aesthetically refined while maintaining full structural integrity of your plumbing runs.

This weld-on bung features a 1/2-inch female NPT (National Pipe Thread) port, meaning any standard 1/2in male NPT fitting—gauge adapters, quick-disconnect couplers, or sensor bosses—will thread directly into it without additional adapters. The clear anodized or unpainted finish allows for direct welding to mild steel, stainless steel, or aluminum tubing using TIG, MIG, or stick processes; the exposed base provides a clean, full-penetration weld surface that resists cracking under thermal cycling and vibration. Weighing just 0.17 lbs, the compact 2.9 x 1 x 3.8 inch profile fits tight engine compartments and custom frame fabrication without excessive material bulk. NPT threads are self-sealing when wrapped with PTFE tape, eliminating the need for O-ring fittings in non-critical gauge applications and simplifying emergency field repairs during events or testing.

Whether you're building a road-race or autocross platform, restoring a classic with modern fuel-injection, or constructing a custom coolant or brake bias system, this bung is indispensable for welded-tube fuel cells, aftermarket radiator setups, and any application where you need permanent, leak-free ports on custom tubing. Professional fabricators and weekend warriors alike rely on REDHORSE PERFORMANCE bungs because they eliminate the weak point of hose clamps and compression fittings on critical lines—once welded, they become part of the tubing itself. Pair this with quality male NPT adapters and braided PTFE or stainless hose for a system that will outlast multiple engine rebuilds.