20AN Two Piece Flare Cap Nut Black

The 20AN two piece flare cap nut black from REDHORSE PERFORMANCE is a precision-engineered fitting component designed for high-performance fuel systems, coolant lines, and hydraulic applications in custom vehicle builds. Whether you're assembling a turbocharged fuel delivery system, upgrading brake lines on a track car, or plumbing a custom cooling circuit, this cap nut provides the secure, leak-free termination point your system demands. Built for builders and technicians who refuse compromise on reliability, the 20AN two piece flare cap nut black seals the end of AN-format hose assemblies with professional-grade integrity.

The two-piece design of this flare cap nut is critical for proper installation and service. The cap body accepts a 37-degree JIC flare fitting end, while the separate nut threads onto AN-threaded ports or adapters, creating a sealed connection that resists vibration and pressure cycling common in high-flow applications. The black anodized aluminum construction delivers excellent corrosion resistance without sacrificing weight savings—essential when every pound matters in engine bay real estate. The 20AN size accommodates larger displacement fuel injector rails, auxiliary cooling circuits, and transmission fluid lines, making it ideal for LS swaps, big-horsepower builds, and dual-fuel configurations where standard hose routing isn't practical.

Mechanics, engine builders, and fabrication shops trust REDHORSE PERFORMANCE fittings for motorsports and street applications where system pressure and thermal cycling test every connection. This 20AN two piece flare cap nut black works seamlessly with any AN-format hose assembly—whether braided stainless, PTFE-lined, or synthetic rubber—and requires only a 37-degree flare tool and proper torque sequencing during installation. Compatible with fuel systems up to 200+ psi, cooling circuits, power steering upgrades, and transmission coolers, the cap nut's reliable sealing geometry eliminates the need for thread sealant on the flare interface, reducing contamination risk in sensitive fuel systems. Builders frequently specify REDHORSE fittings in competition vehicles, show cars, and daily-driver restorations where appearance and performance align.