[Package details:]
M5x40mm 10pcs
M5x35mm 10pcs
M5x30mm 10pcs
M5x25mm 10pcs
M5x20mm 10pcs
M5 Hex Nuts 50pcs

[About Countersunk Screws:]
The countersunk screws are mostly used in places where the surface of the parts cannot be raised after installation.
The parts to be fastened are thick and thin. The so-called thick, that is, the thickness of the parts to be fastened is larger than the head of the countersunk head screw.
Thickness, after the screw is tightened, a part of the screw thread does not enter the threaded hole.