3/8" x 1/4" Female NPT Brass Reducing Coupling. Used for a variety of applications, not limited to grease, fuels, refrigeration, water, oil gas, and hydraulic systems. Working pressure of 1200 PSI. Temperature range of -65°F to 250°F (-53°C to 121°C). Meets the standards of ASA, ASME and SAE. Not deemed lead free. Not for use with potable water. Please Note: NPT Thread size is NOT determined by its outside thread diameter in inches. Please review our attached NPT sizing chart to cross reference NPT thread size to linear inches