Phillips screws securing the keyboard cable cover mbp2011, source?

I've misplaced the two 1.5 mm ( 1.2 mm ) Phillips screws securing the keyboard/trackpad cable in my 15" MBP early 2011. These are so small I can't tell them apart from other small screws — around since repairing machines since the nighties — that might be the ones. When I think I've found them I discover they only go the first part and can't be tightened.

What is the proper name for these screws? I tried to find them at places selling electronics parts , but I don't know the threading so it has proven quite impossible to get the right ones without the proper info. Anyone has the info needed to get the exact same screws or know a place selling these? I haven't found them here at ifixit.

At the moment I actually misplaced also the screws for the lower case when I recently moved, but I have hopes of finding these again.