#4 Flare End Blkhd Union

The AEROQUIP #4 Flare End Bulkhead Union (FCM2071) is a straight-through hydraulic fitting engineered for applications requiring a secure, leak-free connection across panel or bulkhead walls. This AN-sized coupling connects two 4 AN male ports in a direct line, making it essential for pressurized fluid systems in industrial, aviation, and high-performance automotive environments where space constraints demand a compact pass-through solution.

Constructed from aluminum and finished in blue anodize, this bulkhead union combines corrosion resistance with lightweight construction—critical for applications subject to moisture, salt air, or temperature cycling. The flare-end design provides reliable sealing compatible with AN flare-type hydraulic hose and tubing systems operating across automotive, marine, and aerospace platforms. At 0.05 lbs and compact dimensions (2.35 x 1.05 x 3.9 in), the fitting integrates seamlessly into engine bays, fuel systems, and fluid distribution networks where weight and space efficiency matter.

This fitting is purpose-built for technicians and systems integrators assembling or maintaining custom hydraulic circuits. Whether installing fuel lines in race vehicles, building experimental aircraft systems, or upgrading industrial pneumatic setups, the bulkhead union simplifies wall-mounted configurations by eliminating the need for external elbows or adapters. The blue anodized aluminum meets industry standards for anodic protection while remaining compatible with standard AN wrench sizes for installation and service.

AEROQUIP has long served the aerospace and high-performance automotive sectors with hydraulic components engineered for reliability under pressure. This bulkhead union reflects that heritage—a straightforward, proven coupling for builders and mechanics who require dependable connections without complexity or compromise.