45 Alum #4flare/1/8in Pipe

The AEROQUIP 45 Degree Aluminum 4 AN Male to 1/8 Inch NPT Male Pipe Adapter (FCM2021) is a precision hydraulic fitting designed for systems requiring a 45-degree angle connection between larger AN lines and smaller NPT threaded ports. This adapter bridges the critical gap between AN (Army/Navy) and NPT (National Pipe Thread) standards, a configuration commonly encountered in hydraulic brake lines, fuel systems, and fluid transfer applications across aviation, motorsports, and industrial equipment.

The aluminum construction keeps weight minimal at 0.03 pounds, making it ideal for applications where mass matters. The blue anodized finish provides corrosion resistance in harsh environments—salt spray, humidity, and moisture-prone installations benefit from this protective coating. The 45-degree angle design allows flexible routing around tight spaces and obstructions, reducing the need for additional bends or secondary fittings. The 4 AN male outlet couples to standard #4 AN hose or tubing, while the 1/8 inch NPT male inlet threads directly into NPT-tapped ports found on manifolds, gauges, and component housings.

Technicians and system builders rely on AEROQUIP fittings for hydraulic integrity and leak-free performance under pressure. This adapter is suited for anyone assembling or repairing hydraulic systems, fuel distribution networks, or custom fluid management setups where standard 90-degree or straight connections don't fit the layout. Its compact footprint (2.3 × 1.1 × 3.7 inches) makes installation in confined engine bays and equipment cabinets straightforward.

AN-to-NPT adapters are fundamental components in bridging legacy NPT systems with modern AN plumbing, especially in retrofit and custom-build environments. This 45-degree configuration expands design flexibility where a straight adapter would create routing conflicts or require multiple fittings to achieve the same path.