Coilhose Pneumatics 150USE 5-in-1 Automatic Safety Exhaust Coupler, 1/4" Body Size, 1/4" Female NPT
The Coilhose 5-in-1 Automatic Safety Exhaust Coupler eliminates the inconvenience of matching interchanges by accepting five of the most common 1/4-body size connectors.  Additionally, the 5-in-1 safely bleeds off downstream line pressure prior to releasing the connector, preventing "hose whip."