5/16" Hose ID x 3/8" 37° JIC Brass Swivel Barb Connector. This is a Dual Seat Swivel with SAE and JIC angles. 150 PSI maximum working pressure. -40° to 160° temperature rating. 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