4AN to 4AN(1/4)NPT Union Adapter 90

The 4AN to 4AN(1/4)NPT Union Adapter 90 from REDHORSE PERFORMANCE is a precision-engineered hydraulic fitting designed to connect two hose or tubing runs at a 90-degree angle while transitioning between AN (Army-Navy) and NPT (National Pipe Thread) port standards. This adapter is essential for custom hydraulic systems, fuel lines, and pressurized applications where space constraints or layout requirements demand compact angled connections. Whether you're building a high-performance race vehicle, restoring a classic with modern hydraulics, or designing industrial fluid transfer systems, this adapter ensures leak-free, reliable performance under demanding conditions.

Constructed from aerospace-grade aluminum and finished in black anodized coating, the 4AN to 4AN(1/4)NPT Union Adapter 90 resists corrosion while maintaining a low weight profile of just 0.07 lbs. The 90-degree bend eliminates the need for separate elbow fittings, reducing overall system complexity and potential leak points. The 4AN male connection provides a secure seal compatible with standard AN hose barbs and port sizes, while the 1/4 inch NPT male port accepts industry-standard tapered pipe thread components. REDHORSE's 822 Series fittings are manufactured to tight tolerances, ensuring proper sealing and durability across temperature and pressure ranges typical of automotive and industrial applications.

This adapter is ideal for technicians and builders who need to bridge AN and NPT systems without adding unnecessary length or using multiple fittings. Common applications include fuel system plumbing, transmission cooler lines, power steering circuits, and auxiliary cooling loops where routing around tight spaces is critical. The compact 2.8 x 1.05 x 3.8 inch footprint makes it suitable for engine bays and undercarriage installations with limited clearance. When ordering, verify that both incoming and outgoing hose or tubing sizes match 4AN and 1/4 NPT specifications to ensure compatibility and prevent system failure.