Are any of you familiar with this term? I just now heard it and I'm obsessing a bit over it. (I need food, I've only had coffee so far.) I don't remember ever calling wingnuts anything but wingnuts. Kinda irks me too. If someone asked me to pick up a few 1/4" butterfly nuts I would not know what they're talking about. Or am I just ignorant? Has it always been named a "butterfly-wing" in particular and I've only ever heard the abbreviated term?