Fitting Adapter Straig ht Male -4 AN to Female

The Fitting Adapter Straight Male -4 AN to Female is a precision fluid connection component engineered for high-pressure hydraulic and fuel line systems. This adapter serves as a critical interface in aircraft, racing, and tactical equipment applications where reliable, leak-free connections are non-negotiable. Whether you're assembling custom fuel systems, servicing aviation fluid lines, or building performance hydraulic networks, this straight adapter provides the standardized transition between AN (Army-Navy) and NPT (National Pipe Thread) fittings that modern fluid systems demand.

Constructed from aerospace-grade aluminum and finished with black anodizing, this adapter delivers superior corrosion resistance while maintaining minimal weight—critical in weight-sensitive applications. The straight configuration eliminates unnecessary bends, reducing turbulence and pressure loss across the connection point. The -4 AN port accommodates standard -4 AN hose assemblies (1/4-inch nominal), while the 1/8-inch NPT female end accepts standard pipe thread fittings, making this adapter versatile across both modern AN systems and legacy NPT installations. Black anodizing provides both aesthetic consistency and enhanced durability against fuel, hydraulic fluid, and environmental exposure.

Professionals in aviation maintenance, automotive fabrication, and tactical equipment assembly rely on this adapter for converting between incompatible fitting standards without compromising system integrity. Installation is straightforward—the NPT female end accepts standard pipe thread sealant or PTFE tape, while the male AN end threads directly into -4 AN bulkhead fittings and hose ends. This compact design (3.35 x 1.05 x 3.75 inches) fits tight spaces in engine bays and equipment enclosures. For applications demanding FAA compliance, MIL-SPEC compatibility, or simply reliable fluid management, this straight adapter is an essential component for any serious hydraulic or fuel system.