I checked email but found nothing from you on this subject.
The specifications on the replacement screws are M2.5x20, with thread M2.5x0.45mm, using a hex/Allen tool that is 2 mm.
The part in question is McMaster-Carr Part No. 91292A019
On the units I have assembled things fit perfectly.
Did you receive a set of printed directions?
Gear: Anything in the store!