Restrictor Adapter Fitting -4an to 1/8npt

The Restrictor Adapter Fitting -4an to 1/8npt is a precision-engineered component designed for high-performance fluid monitoring systems. This fitting serves as a critical interface between a standard -4 AN line and a 1/8 inch NPT port, providing a secure and leak-free connection. It is specifically intended for enthusiasts and technicians installing mechanical fuel or nitrous pressure gauges where precise pressure management is required. By integrating a restrictor into the adapter, this component helps ensure stable gauge readings in demanding automotive or industrial environments.

Constructed from high-quality natural brass, the Restrictor Adapter Fitting -4an to 1/8npt offers excellent corrosion resistance and durability under varied thermal conditions. The straight configuration features a male -4 AN flare on one end and a male 1/8 inch NPT thread on the other, facilitating a streamlined installation process. The internal restrictor orifice is strategically sized to dampen rapid pressure fluctuations that can often lead to needle bounce or premature gauge wear. This design philosophy prioritizes the longevity of your mechanical instrumentation by isolating it from harsh hydraulic shocks.

This adapter is an essential upgrade for anyone looking to buy a reliable solution for plumbing mechanical nitrous systems or fuel rails. It is highly compatible with most aftermarket mechanical pressure gauges that utilize a standard 1/8 inch NPT inlet. Users will benefit from the simplified setup, as the dual-purpose design eliminates the need for separate restrictor pills or additional inline hardware. Whether you are finalizing a professional racing build or refining a custom fuel system, this fitting provides the technical specifications needed for accurate, long-term performance monitoring.