#6 Male 90 Deg to Male Swivel 9/16-18 O-Ring

The EARLS #6 Male 90 Degree to Male Swivel 9/16-18 O-Ring adapter is a precision fitting designed to redirect fluid lines at right angles while accommodating rotational movement at the connection point. This black anodized aluminum adapter serves hydraulic and fuel system applications where directional changes and vibration isolation are essential to system longevity and safety.

The 90-degree elbow configuration allows for compact routing in tight engine bays and chassis layouts where straight-through connections would create clearance conflicts. The swivel design—featuring an integral O-ring seal at the joint—permits the fitting to rotate under load, reducing stress concentration at the connection and minimizing the risk of line failure from fatigue or misalignment during thermal cycling. Manufactured from aluminum with black anodized corrosion protection, this adapter resists oxidation in both automotive and marine environments while maintaining the light weight critical for performance applications. The 9/16-18 thread specification indicates both the AN port size (#6, equivalent to 3/8-inch nominal) and the O-ring face seal thread pitch, ensuring compatibility with standard AN-style hydraulic components used in race cars, vintage restorations, and high-performance fuel systems.

This fitting is specified by builders working with custom fuel distribution, brake line reconfiguration, and remote reservoir plumbing where standard 90-degree adapters lack the rotational freedom necessary to absorb vibration and accommodate installation tolerances. Builders and technicians rely on EARLS swivel adapters to reduce line stress and extend the service life of both the hose and the connected components, particularly in high-vibration or thermally demanding applications.

The swivel O-ring design represents a standard approach in professional hydraulic system assembly, where controlled rotation at connection points is recognized as a reliability enhancement. Each adapter is supplied as a single unit, allowing builders to source individual fittings to complete custom fluid system configurations without purchasing full kits.