I found this tiny pot of machine screws in a junk shop. They are absolutely tiny but I wasn't sure what thread they are but I had an inkling they might be BA so I checked them with my BA tap and die set and they're 10BA!!! I was looking to maybe use one to replace the screw that keeps the Bialaddin control know on the shaft but these are way too small! Nevermind, I'm sure I'll find a use for them one day! BTW, the OD is 1.7mm!