#3 AN Plug Black

The Fragola #3 AN Plug Black is a hex head aluminum fitting designed to seal and cap AN-sized hydraulic and fuel line systems. This black anodized plug delivers reliable closure for 3 AN ports, making it an essential component in fuel systems, hydraulic circuits, and cooling lines found in racing engines, high-performance vehicles, and industrial equipment.

Constructed from aluminum with black anodized finish, this fitting provides corrosion resistance while maintaining the lightweight profile critical in performance applications. The hex head design allows for secure installation and removal using standard wrenches, ensuring proper torque application without damaging the fitting. The 3 AN port size (3/16-inch nominal) is a standard diameter across motorsports and industrial hydraulic systems, enabling straightforward compatibility with existing line assemblies and manifolds.

This plug serves technicians, engine builders, and system integrators who need to block unused AN ports during system assembly, testing, or reconfiguration. Whether capping off a fuel rail port on a race engine, sealing a cooling circuit during dyno tuning, or closing ports on a hydraulic manifold during maintenance, this fitting prevents fluid loss and contamination. The anodized aluminum construction resists oxidation in high-vibration environments while keeping system weight minimal—a priority in competitive motorsports and aerospace applications.

AN (Army-Navy) fittings remain the industry standard for fuel, coolant, and hydraulic connections in performance and military applications. Fragola is recognized in the motorsports community for producing reliable, precision-engineered aluminum fittings that meet strict pressure and fitment tolerances. This #3 AN plug integrates seamlessly into any system using standard AN3 ports.