Screw size of axial fan screws?

Hey there!

I replaced the hot ends of my two Ender 3 V3 SE and had to thus unscrew the fan. Thing is… the screws hexagon socket became rounded with just this one replacement. Out of 8 Screws, one went missing, and 4 are rounded.

As the fans became really loud after this replacement, I want to use this chance to upgrade to 4010 ones. Though these still require the screws that came with the printer. So naturally, I want to replace these screws, hopefully with some that are better.

Thing is… the screws, as I measured them right now, have a diameter of 1.9mm at the threads and a threaded length of about 11.69mm (I guess 12mm?), which would give it quite an unusual size. M1.9 screws aren’t even sold.

Am I measuring these entirely wrong?

What are the correct sizes?


Am I doing this entirely wrong?

M2 12mm is what you want