Adapter Fitting Aluminum -4 to 1/8in NPT 10pk

The Adapter Fitting Aluminum -4 to 1/8in NPT 10pk from ALLSTAR PERFORMANCE is an essential component for any serious engine builder, fuel system designer, or vehicle modification enthusiast. These straight-passage adapter fittings bridge the gap between AN (Army-Navy) -4 ports and NPT (National Pipe Thread) 1/8-inch female connections, making them indispensable when integrating modern fuel lines, oil systems, or gauge circuits into custom engine builds. Whether you're upgrading a fuel pressure regulator, installing aftermarket instrumentation, or adapting legacy components to contemporary plumbing standards, this 10-pack ensures you have redundancy and eliminates repeated supply runs.

Manufactured from aluminum and finished in black anodized coating, these adapter fittings deliver lightweight construction without sacrificing durability or corrosion resistance. The -4 AN male end accepts standard braided hose with the corresponding -4 AN crimp swage, while the 1/8-inch NPT female port threads cleanly into engine block bosses, manifolds, or aftermarket gauge panels. Aluminum construction reduces overall system weight—critical in performance applications—while the anodized finish protects against oxidation in harsh underhood environments and resists damage from fuel, oil, and coolant exposure. The straight geometry ensures minimal flow restriction and simplifies routing in tight engine compartments.

Mechanics and fabricators working on fuel-injected conversions, turbo builds, or complete engine swaps will find these adapters invaluable for creating clean, professional connections between modern -4 AN fuel lines and factory or custom NPT threaded ports. The 10-pack quantity supports both primary plumbing and future modifications, reducing inventory costs for shops or serious hobbyists. Installation requires only standard wrenches and Teflon tape on NPT threads to prevent weeping; ensure adequate wrench clearance in your engine bay before final placement. Compatible with all gasoline, diesel, and E85 fuel systems, as well as oil pressure and water temperature gauge circuits.