Google will not sell replacement screws or any parts for that matter. However from reading on this forum I found these two comments from other users>:
09/30/22 Replacement screws M3 x 8mm countersunk machine screws from amazon
When installing the mounting hardware for my new doorbell (battery) to the brick wall, one of the small screws that connects the base plate to the wedge
04/04/24 Terminal Screws for Doorbell 2nd Gen
it's an M2x4mm screw, my M2x4mm screws head was too small so I used a washer that came with it and used that to hold the wire down.
