6AN Male to M14x1.5 O-Ring Aluminum Clear

The 6AN Male to M14x1.5 O-Ring Aluminum Clear fitting from REDHORSE PERFORMANCE is a precision hydraulic and fuel line adapter engineered for high-performance automotive applications where reliable fluid transfer and system integrity are non-negotiable. Whether you're building a custom fuel system for a modified engine, upgrading your power steering setup, or installing high-flow cooling lines, this adapter bridges the gap between -6 AN hose connections and M14x1.5 metric ports found on many aftermarket and OEM components. Designed for serious enthusiasts and mechanics who demand repeatability and leak-free connections under pressure, this fitting eliminates guesswork from system integration.

Constructed from lightweight aircraft-grade aluminum with a clear anodized finish, the 6AN Male to M14x1.5 O-Ring fitting delivers corrosion resistance and visibility without sacrificing strength or adding unnecessary weight to your engine bay or frame rails. The O-ring seal design provides a positive, repeatable interface that prevents weeping at junction points—critical when managing fuel pressure spikes or thermal cycling in modified engine bays. The -6 AN male thread accepts standard automotive hose barbs and fittings, while the M14x1.5 metric female port matches metric-threaded bosses on fuel rails, turbo coolers, transmission coolers, and custom manifolds. The compact 2.5-inch length integrates cleanly into tight engine compartments without compromising system flow rates.

This adapter is ideal for fabricators, street rod builders, and tuners integrating late-model or imported components into domestic platforms, or bridging fuel system standards when upgrading to high-flow fuel rails and injector systems. Installation is straightforward: hand-tighten the -6 AN side, then use a wrench on the hex body to firmly seat the M14x1.5 port without over-torquing the aluminum body. Use with all standard automotive fluids—gasoline, diesel, synthetic oils, and coolant—making it versatile across multiple build scenarios. Always confirm metric port orientation and use PTFE tape or thread sealant on the male M14x1.5 threads for maximum security on critical fuel and cooling circuits.