Coilhose Pneumatics 150U 1/4-Inch Body Size, Coilflow Automatic Universal Coupler, 1/4-Inch NPT, Female
These Universal Couplers can be used with 1/4" body Industrial, Aro and Automotive Interchange plugs. Reduces inventory by eliminating the need to stock three Interchanges and  saves time by eliminating matching up the "right" coupler to the connector.