I have the same issue as caselover. Three screws worked fine, but one was definitely cross-threading; tried several of the screw holes with that one screw and all felt the same, but with the other screws they went in without any problem.
I just need ONE screw, as does caselover, or some way to determine the screw type.
I finally found the screw type! Look for "M2.5" screws with 10mm length and an appropriate (i.e. not too large) screw head.
Raspberry Pi 4 case screw type
in General Questions
Posted
I finally found the screw type! Look for "M2.5" screws with 10mm length and an appropriate (i.e. not too large) screw head.