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. ProductSiteLaunchDate : 2019-12-08T08:00:00.000Z Size : One Size SupplierDeclaredDgHzRegulation : not_applicable UnspscCode : 31161500