6AN to 5/16in SAE Quick Disconnect Female STR

The 6AN to 5/16in SAE Quick Disconnect Female STR from REDHORSE PERFORMANCE is a precision fluid coupling adapter engineered for high-performance fuel, oil, and coolant systems in custom-built and modified vehicles. Built for serious enthusiasts and fabricators, this straight-thread quick disconnect fitting bridges metric AN sizing (6AN) to standard SAE nomenclature (5/16in), making it an essential component for engine swaps, turbo installations, and custom fuel system builds. Whether you're converting a carbureted engine to fuel injection, adapting aftermarket fuel components, or plumbing a modified cooling circuit, this adapter simplifies connections while maintaining reliability under pressure.

This straight-thread quick disconnect features a female SAE connection that accepts standard 5/16in male disconnect couplers, allowing rapid disconnection and reconnection without spillage or system drainage. The 6AN port on the opposite end accommodates metric hose barbs and AN-spec fittings commonly found in modern performance fuel systems and custom plumbing applications. REDHORSE PERFORMANCE fittings are manufactured to exacting tolerances with precision sealing surfaces to prevent fuel weeping and ensure leak-free operation under boost, high RPM, and sustained load conditions. The compact 2.84 x 1.1 x 4.42 inch footprint and lightweight 0.095 lbs design make it easy to route in tight engine bays and custom installations without adding unnecessary bulk or stress on hose runs.

This adapter is ideal for fabricators working on engine conversions, auxiliary cooling system upgrades, or fuel supply modifications where AN hose availability and SAE component interoperability are requirements. Installation is straightforward—simply connect your 6AN hose or barbed fitting to one side and mate your SAE quick disconnect coupler to the other. Use appropriate thread sealant (PTFE tape or anaerobic compound) on all threaded connections and verify SAE coupler compatibility with your specific disconnect bodies before final assembly. Suitable for gasoline, diesel, and non-corrosive cooling fluids in both naturally aspirated and boosted applications, this REDHORSE PERFORMANCE fitting delivers OEM-quality reliability in custom and modified powerplants.