Per Milton S1816 G Stile 1/2" NPT Accoppiatore Aria Uomo 60+ SCFM Air Shop
QUICK CONNECT AIR FITTINGS: (Model # S-1816) Used in applications that require over 60 SCFM. It features a 1/2” NPT male thread on one end, which can be threaded onto a corresponding female NPT fitting.