#10 Male Union Ano-Tuff

The EARLS #10 Male Union Ano-Tuff is a straight adapter fitting designed to connect two 10 AN male ports in high-performance fluid systems. Manufactured from aluminum and finished in black anodized coating, this fitting provides a direct male-to-male connection for applications requiring secure, leak-free hydraulic or fuel line coupling. The ano-tuff designation indicates superior corrosion resistance and durability against wear and environmental exposure.

The 10 AN thread size (.625" diameter) is the industry standard for high-flow applications in racing, marine, and off-road environments where reliable pressure containment is critical. The straight configuration eliminates unnecessary bends in the line path, reducing turbulence and pressure drop while simplifying installation in tight spaces. Black anodizing protects the aluminum substrate from oxidation and mechanical damage, maintaining structural integrity across thermal cycling and extended service life. Weighing just 0.08 lbs, this adapter adds minimal weight to any system while delivering the structural rigidity required for motorsport and marine duty.

This fitting serves builders and technicians assembling custom fuel systems, hydraulic brake lines, or transmission cooler circuits where two male-threaded ports need direct coupling. Common applications include race vehicle fuel distribution, marine engine cooling systems, and high-pressure pneumatic or hydraulic manifold integration. The compact 1.55 × 1.2 × 3.05 inch footprint fits confined engine bays and mounting locations where space is at a premium.

EARLS fittings are recognized in the performance and racing community for precision manufacturing and consistent quality. The 10 AN standard ensures compatibility with OEM and aftermarket hose assemblies, block adapters, and manifolds across the motorsport and marine sectors. This adapter is sold as a single unit.