#6 x 1/8NPS Transmission Adapter Fitting Black

The #6 x 1/8NPS Transmission Adapter Fitting Black from FRAGOLA is a precision hydraulic adapter designed for custom transmission cooling lines, fuel systems, and fluid distribution circuits in high-performance vehicle builds. This straight-configuration adapter bridges two common port sizes—6 AN (male) to 1/8 inch NPS (male)—making it essential for mechanics and fabricators who need reliable, leak-free connections when modifying transmission cooling systems or integrating aftermarket components. Whether you're upgrading a performance transmission, installing a remote cooler system, or adapting legacy plumbing to modern AN hose standards, this fitting provides the versatility and durability required in serious automotive work.

Machined from aluminum and finished in black anodize, the #6 x 1/8NPS adapter combines light weight with corrosion resistance and professional appearance on show-quality builds. The 6 AN male end accepts standard -6 hose with a 37-degree JIC flare or crush washer seal, while the 1/8 inch NPS (National Pipe Straight) male thread accommodates port connections on transmissions, coolers, and adapter plates. FRAGOLA's precision manufacturing ensures tight tolerances and repeatable sealing, critical when fluid pressure and thermal cycling demand absolute reliability. The straight design minimizes turbulence and pressure loss compared to 90-degree alternatives, making it ideal for transmission cooler circuits where flow rate directly impacts cooling efficiency.

This adapter is indispensable for builders working with modern modular transmissions, custom cooling setups, and OEM-to-aftermarket system integrations. It pairs seamlessly with -6 AN hose assemblies and works across street rods, race cars, performance trucks, and transmission swaps where factory port sizes don't align with contemporary plumbing standards. Installation requires basic wrench work—thread the NPS end into your port or adapter block with thread sealant, then connect your -6 hose with the appropriate crush washer or flare fitting. Compact dimensions (1.4 x 0.95 x 4 inches) and minimal weight (0.02 lbs) ensure it fits tight engine bays without adding measurable mass to your drivetrain.