3/8 NPT Weld Bung - Steel

The ARP 3/8 NPT Weld Bung - Steel (Part No. 800-8202) is a precision-engineered weld-on fitting designed for direct integration into fuel systems, fluid reservoirs, and pressurized tanks. This female NPT threaded bung provides a reliable interface for fuel lines, sensors, and gauge installations where permanent attachment is required. Manufactured from steel with a natural finish, it delivers the corrosion resistance and structural integrity needed for demanding automotive, racing, and industrial applications.

The 3/8-inch NPT female thread accepts standard NPT-compatible fittings and adapters, allowing for seamless connection to fuel injectors, fuel regulators, pressure sensors, and distribution blocks. The weld-on design eliminates threaded ports or external mounting hardware, creating a permanent, leak-proof junction that won't vibrate loose during high-performance driving or continuous operation. NPT (National Pipe Thread) tapered threading creates a mechanical seal without requiring separate sealant on many applications, though thread compound is often recommended for optimal reliability. Steel construction provides superior heat resistance compared to brass or aluminum alternatives, critical in engine compartments and near exhaust systems.

This bung is ideal for fabricators, engine builders, and technicians who custom-design fuel systems for racing, hot rod restoration, turbocharged applications, and off-road vehicles. Whether integrating a fuel pressure gauge, fuel line distribution block, or sensor boss into a hand-fabricated tank or manifold, the ARP 800-8202 offers a proven, cost-effective solution. The weld-on mounting method provides superior strength and vibration resistance compared to bolt-on alternatives, making it the preferred choice for high-stress environments where reliability cannot be compromised.

ARP (Automotive Racing Products) is recognized for manufacturing fasteners and fuel system components engineered to withstand extreme conditions. The 3/8 NPT Weld Bung represents the brand's commitment to precision manufacturing and durability in performance automotive applications. Compact dimensions and minimal weight allow seamless integration without adding unnecessary mass or complexity to custom fuel system designs.