12AN STR Male Adapter 1in NPT Male Blue

The 12AN STR Male Adapter 1in NPT Male Blue from REDHORSE PERFORMANCE is a precision hydraulic and fuel line fitting engineered for custom engine builds, turbo installations, and high-flow fuel system upgrades. This adapter serves as a critical junction between AN (Army-Navy) threaded hose ends and NPT (National Pipe Thread) equipped components, making it indispensable for builders who need to integrate modern fuel rails, remote oil coolers, or fuel pressure regulators into vintage or modified powerplants. Whether you're tuning a fuel-injected swap or pressurizing a custom cooling circuit, this straight adapter ensures leak-free connections under demanding conditions.

Built with REDHORSE PERFORMANCE's reputation for durability, this 12AN to 1-inch NPT male adapter features a straight configuration that minimizes flow turbulence and pressure drop—critical for maintaining consistent fuel delivery or oil circulation in high-performance applications. The blue anodized aluminum body reduces weight compared to steel alternatives while providing superior corrosion resistance and visual identification within engine bays. The precision machining of both the 12AN port (which accepts standard -12 hose with JIC 37-degree flare seating) and the 1-inch NPT male threads ensures zero leakage when properly torqued, eliminating the guesswork from custom system fabrication. The compact footprint (2.8 x 1.4 x 3.75 inches) and lightweight design (0.16 lbs) make it easy to route lines in tight engine compartments without sacrificing strength or reliability.

This adapter is ideal for fuel system builders, engine swap specialists, and performance mechanics upgrading OEM fuel delivery or cooling systems on street and race cars alike. Common applications include connecting aftermarket fuel rails to NPT-threaded fuel blocks, adapting AN hose runs to factory NPT ports on fuel pumps or regulators, and integrating remote mounted fuel filters or accumulators into custom circuits. Always verify thread compatibility before installation, apply appropriate thread sealant to NPT connections, and torque all AN fittings per manufacturer specifications to ensure system integrity under boost or sustained high flow conditions.