Name that argon fitting! Or, where do I buy the QDs Everlast uses?

[RichardH]

You can get them from Everlast directly or Maryland Metrics also has them.

Maryland Metrics is quite a resource! Can anyone tell me what the fitting is called / what the specs are?

I'm sure it's a common item, but getting the right one is harder. (E.g., for air tools, there are like 10 different QD types, but only 1-2 popular versions.)

Thanks!