#8 x 7/8-14 (#10) Radius O-Ring Fitting Black

The #8 x 7/8-14 (#10) Radius O-Ring Fitting Black from FRAGOLA is a precision hydraulic adapter engineered for high-performance fuel, oil, and coolant systems in modified vehicles and race applications. This compact fitting delivers the reliable, leak-free connections that serious engine builders and performance mechanics demand when assembling forced induction systems, fuel injection setups, or custom cooling loops. Whether you're upgrading a turbo install or finalizing a complete engine rebuild, this o-ring fitting ensures consistent pressure retention across demanding driving conditions.

Built with FRAGOLA's proven radius o-ring design, this #8 AN (1/2-inch nominal) fitting features a 7/8-14 thread specification that provides superior sealing geometry compared to standard straight-thread adapters. The black anodized finish resists corrosion in engine bay environments while the precision-machined aluminum body maintains structural integrity under sustained pressure spikes. The radius o-ring profile creates a dual-sealing interface that compensates for minor surface irregularities, reducing installation sensitivity and extending component lifespan in turbocharged or supercharged platforms where thermal cycling and vibration stress standard connections.

This fitting is ideal for custom fuel rail fabrication, turbo feed-and-return line assembly, and prototype engine management installations where OEM hose routing is impractical. Mechanics and fabricators working on LS swaps, rotary conversions, and nitrous oxide systems appreciate FRAGOLA's dimensional consistency and thread accuracy—critical factors when developing multi-point fuel systems or staged boost controllers. The compact 1.85-inch length accommodates tight engine bay configurations while maintaining standard #10 (AN-8) compatibility with matching hoses, fittings, and adapter blocks across the aftermarket hydraulic ecosystem.