Quick Disconect barb size info needed

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kitoog

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I am looking at getting a few quick disconnects which just have the barb on them, no 1/4 ffl thread. I have one here already and I measured the max width and was about 7.2mm and it works fine pushing 6.7mm internal tubing on to it. The disconnect barb it about 5.6mm internally roughly. Is the barb measurement the internal diameter or external? I was just looking online and only noticed 6mm and 8mm screw on barbs for threaded disconnects. I could not find any specs for barbed only disconnects.
 
You could try something like CPC connectors. These come with hose barbs and can be bought as standard quick-connects or they also do dry-break versions.

If you search for 'CPC couplings' on RS website ( http://uk.rs-online.com/ ) you'll find them under Hose, Ducting or Fittings heading.
 

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