Printing screws - is the output usable? (M3 or M4)
well... it's hard to imagine printing M3 or even M4
I haven't try but I haven't because I'm pretty sure it's not possible (on my printer of course)

but some time ago I've tried M8 which is of course way from your needs
it was printed on 0.1mm layer height

it went ok into the nut without any problems but the strength is not very high I suppose

I know the quality is poor but even such bad photo shows issues