After my "parts career" I was working in Spokane for a very small HVAC/R service company. Boss also had a tree farm (he's dead the tree farm still lives) and he bought one of these truck mounted tree transplanters--sight unseen--from the Chitcago area--and had it shipped to Spokane, 20G, sight unseen!!!
Anyhow it was on a long wheelbase Ford ?600? and the boss decided he wanted ME to shorten the frame of the truck. At some point I ended up in a local parts store in Spokane, I told the guy "I need to plug some brake fittings, I need some 3/16 inverted flare unions and some 3/16 inverted flare plugs"
I don't remember "what next" but at some point he came back out with SAE flare
I told him THOSE are NOT inverted flare. "Well" he says "you have to figure out what you want."
"Go get your manager"
I told the manager "I want you to send a brass fittings catalogue home with this guy, so next time somebody asks for inverted flare fittings, he knows WTF the customer is asking for!!"
........Similar to one of these things.............