#10flare/#10flare Union

The #10 flare/#10 flare union from Aeroquip is a critical hydraulic fitting designed for high-pressure fuel, oil, and coolant systems in performance and heavy-duty vehicles. This compact adapter connects two #10 SAE flare lines with equal-diameter ports, making it ideal for custom fuel system builds, engine modifications, and transmission cooler installations where reliable, leak-free connections are non-negotiable. Whether you're fabricating a fuel system for a supercharged engine or upgrading cooling lines on a modified truck, this union provides the precision fit and durability professional mechanics and enthusiasts demand.

Manufactured by Aeroquip, a trusted name in fluid conveyance systems, this #10 flare/#10 flare union features precision-machined SAE flare seats that create a metal-to-metal seal without relying on rubber gaskets. The flare design allows for visual inspection of the connection and simplifies disassembly during maintenance or system modifications. Aeroquip's engineering ensures minimal pressure drop across the fitting, critical when every PSI matters in high-flow fuel injection systems or turbo cooling circuits. The compact 3.5-inch length minimizes packaging bulk in tight engine bays, while the 0.12-pound weight keeps overall system mass low—important considerations for weight-conscious builds and track-focused vehicles.

This fitting is essential for builders working with fuel systems rated 100+ PSI, custom cooling loops, and high-performance hydraulic applications where standard hose clamps simply won't suffice. The SAE #10 flare standard (3/8-inch tubing) is widely used in modern performance fuel systems, making this union compatible with most aftermarket fuel rails, regulators, and distribution blocks. Installation requires only two wrenches and familiarity with flare fittings; ensure tubing is properly flared to 37-degree SAE specifications before assembly. Store mechanics, engine builders, and shade-tree enthusiasts alike rely on Aeroquip fittings for their reputation of zero-leak performance under sustained high pressure and temperature extremes.