3 An To 7/16

The EARLS 3 AN to 7/16 straight adapter fitting is a precision hydraulic connector engineered for professionals who demand reliability in high-pressure fluid line systems. This male-to-male adapter bridges 3 AN (Army-Navy) port sizes to 7/16-24 inverted flare ports, making it essential for custom fuel, coolant, and brake line installations on performance vehicles, aircraft, and industrial equipment. Whether you're building a custom fuel system, upgrading a race car's plumbing, or retrofitting hydraulic controls, this adapter provides the secure, leak-free connection critical to system integrity.

Constructed from steel and finished with zinc oxide coating for corrosion resistance, the 3 AN to 7/16 adapter features inverted flare male threads on the 7/16-24 side—the industry standard for automotive and aerospace applications demanding vibration resistance and repeatable sealing. The straight configuration allows direct line routing without bends, reducing turbulence and stress points in the system. At just 0.08 lbs and compact dimensions of 1.15 x 0.6 x 2.5 inches, this fitting integrates seamlessly into tight engine bays and confined spaces. The 1/4-inch hardline specification confirms compatibility with quarter-inch tubing, a common standard in both OEM and aftermarket fuel and cooling systems.

Professionals choose EARLS adapters for mission-critical applications where failure is not an option—drag racing, military vehicles, aerospace hydraulics, and high-end motorsports all rely on this brand's precision engineering. This fitting is sold as a pair, offering economy for builders working with multiple connection points or providing redundancy for system redesigns. Installation requires standard wrench or crescent tools; ensure proper thread sealant application to inverted flare connections for optimal pressure retention. Compatible with any system utilizing 3 AN male ports and 7/16-24 female inverted flare receptacles, this adapter is a trusted solution for custom hydraulic work.