Milton S-727 1/4" MNPT M Style Plug - Pack of 2 1/4" male national pipe thread Maximum inlet pressure of 300 pounds per square inch Maximum air flow of 40 standard cubic feet per minute Maximum temperature of 250 degrees Fahrenheit Made in USA The Industry Standard M Style Plug Plug M Style 1/4" Basic Flow Size 1/4" Male NPT Steel plug Air flow 40 SCFM Complies with military specification MIL-C-4109