#3flare/#3flare Union

The Aeroquip #3flare/#3flare Union is a precision hydraulic adapter fitting engineered for high-pressure fluid transfer in automotive and heavy equipment applications. This compact union connector links two #3 SAE flare lines without reducing flow capacity, making it essential for brake systems, transmission coolers, power steering circuits, and custom hydraulic modifications. Mechanics and fabricators rely on Aeroquip fittings to maintain system integrity under demanding conditions where leaks or failures are unacceptable.

Constructed from hardened steel with Aeroquip's proven flare-seal design, the #3flare/#3flare Union delivers leak-free performance across temperature and pressure extremes. The SAE #3 flare standard (3/16-inch tubing) creates a mechanical seal between the tapered male and female surfaces, eliminating the need for additional ferrules or sealing compounds. At just 0.04 lbs, this lightweight fitting minimizes system mass while its compact 2.3 x 1.1 x 3.7-inch footprint allows installation in tight engine bays and frame-mounted reservoirs without sacrificing accessibility for future service.

This union fitting suits enthusiasts building custom hydraulic lines for drag racing, trail rigs, and vintage restorations where OEM hose routing conflicts with engine modifications. Direct flare-to-flare coupling ensures zero flow disruption and eliminates vibration-induced fatigue that can plague substandard adapters. Installation requires only standard wrenches and familiarity with proper flare-wrench technique; the simple design guarantees compatibility with any system running SAE #3 tubing diameter, from single-circuit brake applications to complex multi-circuit setups.