Inline Fuel Pump Fitting M10 x 1 to 6 AN Male

The Walbro/TI Automotive Inline Fuel Pump Fitting M10 x 1 to 6 AN Male (part number 128-3039) is a precision adapter designed to connect modern fuel pump outlets to AN-standard fuel system plumbing. This straight-flow fitting accommodates the metric M10x1.0 thread common to Walbro in-line fuel pumps while transitioning to industry-standard 6 AN (AN6) male connections, enabling seamless integration into custom fuel systems without requiring multiple adapters.

Constructed from aluminum and finished in blue anodizing, this fitting resists corrosion while maintaining the lightweight profile critical in fuel system design. The M10x1 inlet threads directly onto Walbro fuel pump outlets, while the 6 AN male outlet accepts standard 6 AN hose fittings, adapters, or fuel rails. Blue anodizing provides visual identification and protective oxide coating for extended durability in aggressive fuel environments. The straight design minimizes pressure drop and turbulence compared to elbow configurations, preserving pump efficiency across throttle transitions.

This adapter is essential for builders integrating OEM or aftermarket Walbro fuel pumps into custom EFI systems, race fuel cells, or high-flow fuel lines where AN fittings are standard. Muscle car restorations, modern engine swaps, and competition fuel system builds all rely on metric-to-AN transitional fittings to bridge pump designs with contemporary plumbing standards. The compact 1.5-inch length and light 0.02 lb weight add minimal footprint to tight engine bay installations.

Walbro fuel pumps are OEM-equivalent components trusted in street, off-road, and racing applications. This fitting ensures proper flow interface between the pump and downstream fuel delivery, supporting fuel pressure ratings up to system limits. Verify thread compatibility with your specific pump model before purchase; M10x1.0 is standard across most Walbro in-line designs, but confirmation with your pump documentation eliminates installation guesswork.

Ships individually—order the quantity needed for your fuel system configuration.