Sorry - I really don't know the specs.

We can certainly sell you one, but for one missing case screw, do you need it?

I looked on your site first but you didn't have it as a standard product... They are so small you'd think that people would be loosing them all of the time. It seemed to have a bit more rattle when the screw was missing so that's why I wanted to have all of them in place. The fan replacement I got took care of most of the rattle. though. Thanks for the offer - it is greatly appreciated that you'd go the extra mile for this sort of thing.

I DID manage to find what seems to be a replacement, however. Took visiting several hardware stores and I finally managed to get a match at Menard's (a MN USA based hardware store chain). It is a 3MM x 6MM machine screw. It is a "Handi-Pack" in their "micro-screw" section. It has a Philips head instead of a torx one but that wasn't important to me. It is marked with part number 87249 for a 2 pack, stainless steel set. The UPC code is 738287872491. In case anyone else ever needs a close match.

Thanks!