AN-4 Male to 7/16″-24 SS [1mm Restrictor]

This TightFit AN-4 Male to 7/16″-24 SS [1mm Restrictor] adapter is CNC machined from stainless steel and finished in raw form. It’s a UNF factory-thread adapter with a 1mm internal restrictor for controlling flow (e.g. turbo oil feed), suited to turbo oil feed and OE fuel rail systems. Like every TightFit fitting, it’s manufactured to strict tolerance control and backed by our 2-year limited warranty.