Who sells self-tapping machine screws?
Honest, there is such a thing. Actually several types, they are machine screws that are slightly tapered with one or more cuts at the tip, so they will self-tap and bite into sheet metal, and then snug down on a regular machine screw shaft.
I need a dozen 6mm (size) by 8-10mm (length) to replace some 4x.7mm machine screws that have stripped out. Don't really care if that's 6x.8 or any similar thread--I just need a fine thread self-tapping machine screw. Actually, a dozen of them, and the only supplier I found runs them off in lots of a thousand. (Ulp.)