#6 Union

The EARLS #6 Union straight adapter fitting is a precision aluminum connector engineered for high-performance fluid line systems. This 6 AN male-to-6 AN male adapter joins two hose lines end-to-end with zero offset, maintaining pressure integrity and flow characteristics in demanding applications. The blue anodized finish provides corrosion resistance while enabling quick visual identification in complex plumbing configurations.

Constructed from lightweight aluminum, this fitting reduces system weight compared to steel alternatives while maintaining rated pressure capacity. The 6 AN sizing accommodates larger flow volumes typical in racing fuel systems, coolant loops, and hydraulic applications where diameter and material consistency are critical. Anodizing adds a protective oxide layer that resists oxidation and corrosion from exposure to fuel vapors, coolant chemistry, and moisture—essential for longevity in engine bays and marine environments.

This adapter is designed for builders and technicians assembling custom fuel delivery, cooling, and hydraulic systems where straightforward coupling and reliable sealing are non-negotiable. The straight configuration eliminates the need for separate elbows or offset fittings in inline applications, reducing complexity and potential leak points. Users working on vintage restorations, high-output engine builds, and marine cooling systems benefit from the compact form factor and standardized AN threading.

Proper torque specifications and thread-sealant protocol (where applicable per system design) are essential for leak-free operation. The straightforward union design simplifies disassembly during maintenance—a practical advantage in race shops and field service situations where quick hose swaps are routine.