Milton (1839) 1/4" MNPT H-style Air Compressor Quick Connect Air Fitting Plug - Box of 10 H-STYLE: Large Tool Aplication Plug KWIK-CHANGE: Interchangeable/compatible with most manufacturers NPT: 1/4" Male national pipe thread flow size. Case hardened Steel plated to resist rust. Buna-N seals. MAXIMUM: 67 standard cubic feet per minute (SCFM). 300 PSI inlet pressure. Temperatures up to 250 degrees F. INCLUDED IN MILTON T-STYLE KITS: #S-223