#4 Str to 1/8 NPT Oil Pressure Fitting

The #4 Str to 1/8 NPT Oil Pressure Fitting by EARLS is a precision-engineered adapter designed to connect 4 AN male ports to 1/8 inch NPT male threads in fluid delivery systems. This fitting is ideal for technicians and enthusiasts working with high-performance engines, hydraulic systems, and custom plumbing applications where reliable pressure line connections are critical.

Constructed from steel and finished with zinc plating, this fitting provides corrosion resistance and durability in demanding environments. The straight configuration simplifies installation while maintaining full flow integrity across the adapter interface. Zinc plating protects against rust and oxidation, ensuring a leak-free seal that withstands repeated pressure cycling and temperature fluctuations.

This adapter is particularly beneficial for builders retrofitting older systems to modern AN fittings or integrating NPT-threaded sensors and gauges into AN-based frameworks. Its compact design accommodates tight engine bays and custom chassis layouts while maintaining clearance from heat sources and moving parts. Installation requires standard wrenches and a thread-seal compound suitable for metal-to-metal connections.