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

The 6AN Male Flare to 1/8in NPSM Trans Fitting from REDHORSE PERFORMANCE is an essential component for custom transmission and fluid line applications in automotive builds. Designed for mechanics and enthusiasts modifying fuel systems, transmission coolers, or custom plumbing circuits, this fitting bridges two industry-standard connection types that rarely interface directly. Two fittings per package provide redundancy and accommodate multi-circuit installations, making this a practical choice for complete system overhauls or staged upgrades.

This adapter converts a 6AN male flare connection to a 1/8-inch National Pipe Straight Mechanical (NPSM) thread port, enabling seamless integration between aftermarket -6 braided hose assemblies and OEM or performance transmission ports. The male flare end accepts standard AN hose fittings with proven leak-free performance under pressure, while the 1/8in NPSM end threads directly into transmission case ports, cooler inlets, or manifold blocks without requiring bulkhead adapters. REDHORSE PERFORMANCE fittings are manufactured to strict tolerances and typically feature precision-machined bodies that resist vibration loosening and thermal cycling degradation common in high-performance engine bays.

Professional rebuilds of automatic or manual transmission cooling circuits, aftermarket oil cooler installations, and custom fuel distribution manifolds all rely on these adapter fittings to connect modern braided hose systems to legacy or specialized port configurations. Verify your transmission or component port thread size before purchase—1/8in NPSM is common but not universal across all manufacturers. Installation requires a wrench on the hex body and proper sealant or thread tape on the NPSM end; the flare connection seats without additional sealant when mated to compatible -6 fittings, ensuring reliable long-term operation in demanding applications.