Milton’s G-Style couplers and plugs are the highest SCFM rated and are used in applications that require over 60 SCFM. These 1/2" MNPT G-style couplers are offered in 2 different sizes (.125 or .375 critical profile dimension tip sizes), but both will function the same with G-style plugs. 1/2” MNPT and basic flow size, with a maximum air flow of 99 standard cubic feet per minute and 300 PSI max inlet pressure. Made of durable steel, plated to resist rust.
Abbott Rubber Technical Data Sheet