4AN Male Bulkhead to 1/8in FPT Black

The 4AN Male Bulkhead to 1/8in FPT Black fitting from REDHORSE PERFORMANCE is a precision adapter designed for custom automotive fuel, coolant, and hydraulic system builds. Whether you're fabricating a fuel surge tank setup, integrating aftermarket fuel pressure regulators, or plumbing a custom cooling circuit, this bulkhead connector bridges 4AN male threads to 1/8-inch female pipe thread ports seamlessly. Purpose-built for high-performance street cars, race vehicles, and custom mechanical systems, this fitting eliminates the need for multiple adapters and reduces potential leak points in critical engine bay plumbing.

Manufactured from durable black-anodized aluminum, the 4AN Male Bulkhead to 1/8in FPT fitting combines corrosion resistance with lightweight construction essential for performance vehicle applications. The male AN port accepts standard 4AN hose ends with JIC or rubber hose assemblies, while the 1/8-inch female pipe thread side mates directly to gauge ports, sensor fittings, or regulator inlets without additional reducers. The compact 2.835 x 1.095 x 4.423-inch profile allows installation in tight engine compartment spaces, and the black finish integrates cleanly into modern build aesthetics while providing UV and chemical resistance.

This adapter excels in fuel system upgrades, turbocharger plumbing kits, and custom hydraulic line routing where space constraints demand compact fittings. Experienced builders and shops favor REDHORSE PERFORMANCE bulkhead connectors for their precise thread tolerances and repeatable leak-free performance under pressure cycling. Verify your AN thread style (straight or 37-degree JIC flare) and confirm 1/8-inch FPT compatibility with your destination port before purchase to ensure proper installation on your specific vehicle modification project.