#10 x 3/4-16 (#8) Radius O-Ring Fitting Black

The #10 x 3/4-16 (#8) Radius O-Ring Fitting Black by FRAGOLA is a precision hydraulic and fuel system adapter designed for high-performance applications where reliable, leak-free connections are non-negotiable. This straight adapter fitting bridges 8 AN male O-ring ports to 10 AN male connections, making it essential for custom fuel systems, hydraulic brake upgrades, and competition vehicle builds where port size compatibility must be maintained without compromising flow integrity. Whether you're upgrading a street rod, race car, or performance truck, this adapter ensures secure coupling between dissimilar port sizes while maintaining the superior sealing properties that O-ring face seal (ORFS) technology provides.

Manufactured from aluminum and finished in black anodize, the #10 x 3/4-16 (#8) Radius O-Ring Fitting Black delivers both durability and corrosion resistance in demanding underhood environments. The radius O-ring design creates a metal-to-metal seal on the fitting face, eliminating reliance on thread sealants and reducing the risk of leaks under vibration and thermal cycling—critical advantages in motorsports and high-pressure fuel system applications. The 3/4-16 thread specification on the 10 AN side ensures secure engagement, while the 8 AN O-ring port accommodates standard aftermarket fuel lines and component fittings, allowing technicians to integrate new components seamlessly into existing systems without modification.

This adapter benefits fabricators, engine builders, and performance enthusiasts who demand reliability where failure is not an option. It is commonly installed in fuel injection systems, nitrous oxide delivery lines, and custom brake lines where port adaption between AN sizes is required. The lightweight aluminum construction (0.06 lbs) minimizes system weight while the black anodized finish resists oxidation and maintains a professional appearance in visible engine bays. Ensure proper installation with compatible AN hose or tubing rated for your system's operating pressure, and always verify port thread compatibility before assembly.