6AN Male Flare to M14x1.5 Inverted Adapter

The 6AN Male Flare to M14x1.5 Inverted Adapter by REDHORSE PERFORMANCE is a precision hose fitting engineered for custom fuel, oil, and coolant system applications where standard metric threads meet AN (Army-Navy) specifications. This adapter bridges two industry-standard connection types, making it essential for engine builders, custom fabricators, and mechanics integrating European metric components with traditional AN-threaded fuel rail systems or remote filter housings. Whether you're tuning a turbocharged build or consolidating aftermarket fuel system lines, this adapter eliminates the need for costly custom machining.

Constructed from aluminum alloy and finished to REDHORSE's OEM-grade standards, the 6AN Male Flare to M14x1.5 Inverted Adapter features a robust male flare end (6AN sizing) that seats firmly into JIC-compliant female receivers, while the M14x1.5 metric inverted port accepts metric-threaded components common in European and late-model domestic platforms. The inverted thread design—where the fitting threads into a female metric boss rather than onto a male metric post—ensures leak-free sealing under pressure and simplifies installation in tight engine bay spaces. Weighing only 0.055 lbs, its compact footprint (2.8 x 1.1 x 3.85 inches) allows integration into space-constrained applications without sacrificing durability or flow integrity.

This adapter is ideal for mechanics and fabricators working on cross-platform engine swaps, fuel system upgrades, and performance modifications where OEM metric ports need to interface with AN-spec hose lines and components. Installation requires basic wrench work and familiarity with AN flare fittings and metric threads; use thread sealant rated for fuel or coolant systems if applying to inverted ports without factory o-ring seals. Compatible with fuel, oil, and coolant circuits operating within standard automotive pressure ranges, this REDHORSE fitting delivers the reliability and precision fit that professional shops and serious enthusiasts demand.