6AN Male Flare to 1/8in NPSM Trans Fitting 2/pkg

The 6AN Male Flare to 1/8in NPSM Trans Fitting 2/pkg from REDHORSE PERFORMANCE is a precision hydraulic adapter engineered for transmission cooler lines, fuel systems, and custom fluid transfer applications in high-performance vehicles. This fitting serves as a critical interface component when transitioning between AN (Air and Nitrogen) flare connections and NPT (National Pipe Thread) port standards, making it indispensable for builders working with aftermarket transmission coolers, remote oil filtration systems, and engine bay modifications where factory port configurations require adaptation.

This adapter features a 6AN male flare end that seats securely into standard AN-6 hose fittings with a 37-degree flare cone geometry, while the opposite end terminates in a 1/8-inch NPSM (National Pipe Straight Mechanical) port for direct threaded connection to transmission housings, cooler tanks, or engine block fittings. The flare connection prevents leakage through metal-to-metal cone sealing rather than relying on O-rings or tape, a critical advantage when managing transmission fluid pressure or fuel line integrity under boost and thermal cycling. REDHORSE PERFORMANCE fittings are manufactured from aerospace-grade aluminum or stainless steel, depending on application, ensuring compatibility with ATF, fuel, coolant, and synthetic fluids while resisting corrosion in engine bay environments.

Mechanics and enthusiasts upgrading transmission cooling systems, installing remote transmission filters, or relocating fluid reservoirs benefit most from this two-pack offering, which accounts for typical dual-line cooler installations or future replacement inventory. Installation requires standard AN line wrenches and a simple NPSM port thread (no additional adapters needed), making this fitting compatible with most aftermarket transmission coolers from brands like Mocal, setrab, and factory GM, Ford, and Chrysler transmission ports that utilize 1/8-inch NPT bosses. This compact fitting—measuring 2.85 x 1.05 x 4.1 inches and weighing just 0.07 pounds—fits tight engine bay environments without interfering with belt drive systems or intake manifolds.