... (Air Coupler, Air Tool Coupler, Quick Fitting), Milton type; Body size: 1/4", 3/8", 1/2"; Name: USA Industrial Type ... , hose barb, plug, push on hose barb; Material: Brass, steel; Thread size: 1 / 4", 3 / 8", 1 / 2"; Coupler type: Milton type ... ; The quick couplers include: Female thread socket, Male thread socket, Socket with hose tail, Male thread plug, Female thread plug, Hose plug, etc. Before ...