For replacement coupler for your Super Flex hose, see Power Flow 3. 

The Quick-Switch Attachment Coupler is used to add quick-switch capability to your Tire Inflator with Gauge or Power Shot Trigger Regulator. It is an open chuck, allowing air to pass through when no attachment is connected. 1/4" NPT Female thread. Accepts 1/4" Industrial Plug. 

Details:

• Thread - 1/4 NPT Female Threads
• Style - Industrial (Type M)
• Lock - Automatic 8 Ball - 400 psi WP
• OPEN Coupler - Center is hollow, allowing air to pass through regardless if there is a tool plugged in or not
• Automatic - push in to connect, 1-hand operation
  
• Material - Aluminum body – Light weight
• Temperature - (-40°F)