I always say the part number in the supply house. It eliminates any ambiguity as to what I'm after. If I said give me 4x4 j-boxes I might get Raco 190s when I wanted 232s. If I said I wanted romex box connectors I might get Arlington Black Buttons when I wanted Neer C-500s. I ask for a Neer ECO-105 instead of a 2" 200A clamp-on entrance cap because it's less words to say. After all, I'm trying to drink a cup of coffee while I'm there and the less I talk, the more I can sip.
