AN To NPT 90 Degree -4 x 1/4in

The AN To NPT 90 Degree -4 x 1/4in adapter by Allstar Performance is a precision hydraulic and pneumatic fitting designed for high-pressure fluid line applications. This 90-degree angle adapter bridges AN (Army-Navy) and NPT (National Pipe Thread) connection standards, making it essential for custom fuel systems, brake lines, transmission coolers, and air suspension setups where space constraints require directional flow changes. Built for demanding automotive, industrial, and powersports applications, this fitting solves the common challenge of connecting incompatible thread standards in tight engine bays or chassis layouts.

Constructed from durable aluminum and finished with black anodized coating, the AN To NPT 90 Degree -4 x 1/4in adapter resists corrosion while maintaining a lightweight profile of just 0.04 lbs. The -4 AN male port accepts standard -4 AN hose fittings and adapters, while the 1/4 inch NPT male outlet threads directly into NPT-threaded ports, blocks, or manifolds. The 90-degree elbow design allows hose routing around tight obstacles without unnecessary bends that could restrict flow or stress fittings. Black anodize provides additional protection in engine compartments exposed to fluid splash and temperature cycling.

This adapter benefits fabricators, tuners, and enthusiasts building custom fuel systems, intercooler setups, and auxiliary cooling circuits where AN and NPT ports must be joined. It integrates seamlessly into professional drag racing builds, street rod restorations, and aftermarket engine conversions requiring flexible plumbing solutions. Installation is straightforward—thread the NPT end into the receiving port using appropriate thread sealant, then attach -4 AN hose with a standard 37-degree JIC flare fitting. Verify system pressure ratings and fluid compatibility before use to ensure safe, leak-free operation.