... USA Milton/Industrial type air fitting(Pneumatic coupler, Pneumatic Component);Body: 1/4" (3/8"); Thread: NPT; Shape: Female, male, ... barb; Material: Brass or steel; Thread size: 1/4", 3/8", 1/2"; Coupler type: Milton type, Industrial type; ... ; The quick couplers include: Female thread coupler, Male thread coupler, Coupler with hose tail, Male thread plug, Female thread nipple, Hose plug, etc. Before ...