That in the product description is not the thread size is given, is actually n Klopp! Expected I then had M4 thread. And then there was an M3 thread. For others it was M4. Apparently it's a coincidence what you get. And - my fault, if I buy blind.
The screw itself make a high-quality impression. I have put them in a high-quality storage container, because I do not need right now.