#4 Male to 1/8in. NPT Ano-Tuff Adapter

The #4 Male to 1/8in. NPT Ano-Tuff Adapter is a precision-engineered fitting designed to bridge two different hydraulic and pneumatic connection standards in high-performance fluid systems. This straight adapter is essential for technicians, engineers, and enthusiasts working with aviation, automotive, or industrial hydraulic applications where AN (Army-Navy) and NPT (National Pipe Thread) ports must interface seamlessly. By providing a reliable transition between #4 AN male connections and 1/8 inch NPT male ports, this adapter eliminates the need for custom fabrication or incompatible workarounds.

Constructed from lightweight aluminum and finished with EARLS' proprietary Ano-Tuff black anodized coating, this adapter delivers superior corrosion resistance and durability in demanding environments. The anodized surface protects against oxidation, salt spray, and chemical exposure while maintaining a professional appearance. The straight-through design minimizes flow disruption and pressure drop, critical factors in high-pressure hydraulic systems where efficiency and reliability are non-negotiable. EARLS' manufacturing reputation ensures precise thread tolerances and leak-free performance across temperature extremes and varying fluid viscosities.

This adapter is ideal for custom hydraulic line assemblies, fuel system modifications, and industrial fluid transfer applications where standard fittings create incompatibilities. Installation is straightforward—simply thread the #4 AN male end into your source port and the 1/8 inch NPT male end into your destination component, using appropriate thread sealant for NPT connections to ensure a pressure-tight seal. The compact 1.3 x 0.75 x 2.85 inch footprint makes it suitable for tight engine bays and cramped equipment compartments. Verify port configurations before installation to confirm proper orientation and flow direction.