Attwood Mercury Tank Fitting - 1/4" NPT Thread

The Attwood Mercury Tank Fitting with 1/4" NPT Thread is a critical fuel system component designed for marine and small-engine applications where reliable fuel delivery is non-negotiable. Whether you're maintaining an outboard motor, restoring a classic boat, or upgrading fuel system infrastructure, this tank fitting serves as the connection point between your fuel tank and fuel lines—a role that directly impacts engine performance and safety. Built to Attwood Marine's strict standards, this NPT-threaded fitting ensures leak-free operation under pressure and vibration conditions inherent to marine environments.

The 1/4" NPT (National Pipe Taper) thread specification is the industry standard for fuel system applications in mercury outboards and comparable equipment, providing a tapered thread design that creates a secure, pressure-tight seal without requiring additional sealant tape in most installations. Attwood's tank fitting is engineered from marine-grade materials resistant to fuel degradation, corrosion, and the cycling stresses of thermal expansion and vibration. The NPT thread design ensures compatibility with standard fuel line adapters, primer bulbs, and fuel filter assemblies commonly found in marine fuel systems, making replacement or upgrade straightforward for both professional mechanics and DIY enthusiasts.

This fitting is essential for anyone rebuilding or servicing Mercury outboard engines, repairing older fuel systems where corrosion has compromised factory fittings, or customizing fuel delivery systems on vintage or performance marine engines. Mechanics and boat owners benefit from the proven reliability of Attwood components, which have earned trust across commercial and recreational marine fleets for decades. Installation is straightforward—the NPT thread accepts standard 1/4" fuel line adapters and integrates seamlessly into existing tank assemblies, making this fitting a universal solution for fuel system repairs and modifications on compatible Mercury equipment and aftermarket marine applications.