Counter Sunk

A Counter Sunk Screw is used to be placed into countersunk holes. A counterunk is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A countersunk may also be used to remove the burr left from a drilling or tapping operation thereby improving the finish of the product and removing any hazardous sharp edges. A countersunk may be used in many tools, such as drills, drill presses, milling machines, and lathes.