Milton AA style plugs are made of case hardened steel and are plated to resist rust. Featuring a push type sleeve, this 3/8 MNPT AA style plug has a basic flow size of 3/8 and a maximum inlet pressure of 300 PSI. Air flow of 59 SCFM. Product Features:3/8 male national pipe threadMaximum inlet pressure of 300 pounds per square inch59 standard cubic feet per minuteMaximum temperature of 250 degrees Fahrenheit