The threads inside the hole are damaged.

When I inserted the screw into the red-circled hole in the photo, I made sure to keep it perfectly vertical at a 90-degree angle. However, the thread inside seems to have been damaged.

The first few threads from the top — about 3 turns — appear to be deformed at a 90-degree angle, preventing the screw from going in all the way.

As a result, the screw gets stuck and cannot be tightened properly.

1. "The screw is a P5 1.2mm type — could you tell me the correct tap size for the hole it fits into?"
2. "Does the hole in that area go all the way through?"