Adapter Fitting Steel -4AN To 1/8in NPT

The Adapter Fitting Steel -4AN To 1/8in NPT from ALLSTAR PERFORMANCE is a precision hydraulic and pneumatic adapter designed for fluid transfer systems where AN (Army-Navy) and NPT (National Pipe Taper) thread standards must interface. This straight adapter fitting serves automotive, industrial, and specialty equipment applications where mismatched port threads would otherwise require custom fabrication or system redesign. Whether you're building a custom fuel system, brake line assembly, or air/fluid management circuit, this adapter eliminates the need for multiple components.

Constructed from steel and finished with zinc oxide coating, the adapter provides corrosion resistance and durability in both automotive and stationary applications. The 4AN male thread connects to standard AN fittings and hoses, while the 1/8 inch NPT female port accommodates industry-standard pipe fittings, gauges, and pneumatic components. The straight configuration (0° geometry) ensures direct flow paths without bends, minimizing turbulence and pressure loss in critical systems. Zinc oxide plating protects against rust and oxidation, extending service life in engine bays, fuel systems, and exposed mounting locations.

Technicians and fabricators rely on this adapter when retrofitting vehicles with aftermarket fuel injection, supercharger kits, or custom cooling circuits that mix legacy NPT gauge ports with modern AN hose standards. Its compact 3.5-inch length and lightweight 0.07-pound design integrate easily into confined engine compartments without adding bulk. Installation requires standard wrench sizes; the male AN end accepts AN-spec wrenches while the NPT female end accepts pipe wrenches or adjustable spanners. This single-piece adapter eliminates leak points inherent to multi-component solutions, making it ideal for high-performance, marine, and emergency repair applications.