[Package details:]
M4x6mm 20pcs
M4x10mm 20pcs
M4x12mm 20pcs
M4x16mm 20pcs
M4x18mm 20pcs
M4x20mm 20pcs
M4 Hex Nuts 100pcs
[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.