10AN Aluminum Tube Nut 5/8in Hard Line Black

The 10AN Aluminum Tube Nut 5/8in Hard Line Black from REDHORSE PERFORMANCE is a precision-engineered fitting designed for high-performance fuel, oil, and coolant line systems. This tube nut is engineered for use in custom automotive builds, racing applications, and high-pressure hydraulic systems where reliability and leak-free connections are non-negotiable. The 10 AN (10/16-inch) size and 5/8-inch tube compatibility make it an essential component for builders and technicians who demand professional-grade performance plumbing solutions.

Manufactured from lightweight aluminum and finished in black anodize, this tube nut provides superior corrosion resistance while maintaining a clean, professional appearance on engine bays and fuel system installations. The 818 series design ensures a secure, repeatable seal with proper torque specifications—critical for systems operating under pressure or vibration. The hard-anodized black finish not only protects the aluminum from oxidation and environmental degradation but also resists fuel, oil, and coolant exposure, extending service life in demanding conditions. The compact 2.8 x 1.2 x 3.8-inch footprint and minimal 0.055 lbs weight ensure easy installation in tight engine compartments without adding unnecessary mass.

Street rodders, drag racers, and performance engine builders rely on REDHORSE PERFORMANCE fittings to eliminate guesswork in fuel system plumbing. This tube nut pairs seamlessly with 5/8-inch AN hard line tubing and works within 10 AN JIC-standard port systems, making it compatible with carbureted fuel systems, EFI fuel rails, and custom coolant loops. Installation requires standard wrenches and a torque wrench for proper assembly—follow manufacturer specifications to ensure a leak-free seal. Whether you're building a dedicated race engine or upgrading fuel delivery on a street machine, this aluminum tube nut delivers the precision fit and durability expected from REDHORSE components.