3/8 FNPT M style plugs are made of case hardened steel and are plated to resist rust. The industry standard M style plug has a 1/4 basic flow size and a maximum pressure of 300 PSI. M style plugs offer air flow of 40 SCFM. Product Features:3/8 female national pipe threadMaximum pressure of 300 pounds per square inchAir flow of 40 standard cubic feet per minuteMaximum temperature of 250 degrees Fahrenheit
