Countersunk Slotted Machine Screw is a type of screw with a slotted head that is angled and tapered at 82 degrees. This allows the screw to be countersunk, which means that the head can be flush with the surface of a material. Countersunk Slotted Machine Screw is utilized in applications where a flush finish is desired. They are often used in metal or wood applications where the screw head needs to be tapered and flush with the surface of the material. The slotted head allows for easy installation with a flathead screwdriver.