8AN Flare Cap Nut 2 Piece Blue

The REDHORSE PERFORMANCE 8AN Flare Cap Nut 2 Piece Blue is a precision aluminum fitting engineered for high-pressure hydraulic and fuel line applications in performance and racing systems. This 929 Series cap nut delivers reliable thread sealing and vibration resistance in demanding environments where fuel system integrity is critical. The blue anodized finish provides both corrosion protection and quick visual identification within complex plumbing layouts.

The 8 AN port size (1/2-inch nominal) accommodates mid-range fuel delivery requirements typical of turbocharged engines, supercharged applications, and custom fuel system builds. The two-piece construction allows independent cap and nut assembly, simplifying installation and removal without requiring the full line to be drained during maintenance. Aluminum construction keeps weight minimal while maintaining pressure rating integrity—a critical advantage in motorsports and aerospace applications where every pound matters.

This fitting is designed for builders and technicians assembling or servicing fuel injection systems, nitrous oxide delivery lines, oil cooler circuits, and custom hydraulic manifolds. The blue anodized aluminum is compatible with both gasoline and methanol fuel systems, and the flare connection type ensures consistent sealing across temperature cycling and pressure fluctuations. Each unit ships as a single cap nut assembly, allowing modular system expansion or direct replacement of worn fittings without replacing the entire line.

REDHORSE Performance fittings are widely recognized in the motorsports aftermarket for thread consistency and pressure reliability. The 929 Series represents their proven cap nut design, used in everything from road racing fuel systems to drag strip nitrous layouts. Proper torque application and flare connection inspection ensure lasting performance under the vibration and thermal stress typical of high-performance engine bays.