Filler Cap Silver with Weld-In Steel Bung Small

The Filler Cap Silver with Weld-In Steel Bung Small from ALLSTAR PERFORMANCE is a precision fuel system component designed for custom fabrication and racing applications. This weld-on bung and cap assembly accommodates a 1.375-inch opening, making it ideal for fuel tanks, coolant reservoirs, and overflow containers in high-performance vehicles. Whether you're building a street rod, race car, or restoration project, this compact kit eliminates the need for purchasing bung and cap components separately, streamlining your fabrication workflow.

The assembly features a heavy-duty steel bung designed for permanent weld-on installation, ensuring maximum durability and vibration resistance under demanding engine bay conditions. The threaded aluminum cap is silver anodized, providing corrosion resistance and a clean, professional appearance while protecting your tank opening from contamination. The anodized finish resists oxidation and maintains its appearance over extended use, critical for vehicles exposed to moisture, fuel vapors, and temperature cycling. The compact dimensions (4.9 x 1.3 x 6.95 inches) and lightweight construction at 0.44 pounds allow for flexible mounting in tight spaces without adding unnecessary bulk.

This component is best suited for fabricators, custom builders, and motorsports enthusiasts who demand OEM-quality components for professional-grade installations. The weld-on design requires basic metalworking skills and appropriate welding equipment but delivers a permanent, leak-proof connection that outperforms bolt-on alternatives under extreme conditions. Installation requires welding the steel bung to your tank or reservoir, followed by threading the aluminum cap to secure the assembly. Compatibility spans all fuel tank materials where welding is feasible, including steel and aluminum tanks commonly found in vintage and contemporary performance builds.