[ckemere]

Unmentioned is the helpful explanation text in some categories, for example if you search for "compressed air fittings", you get a small box labeled "How to Identify and Measure Fittings" at the top of the page that can be expanded. Included in this is a table of *all* the different kinds of fittings, including measurements. In my case, I had something that I didn't know what was and this allowed me to identify it, then narrow my search for compatible parts.