What is countersunk screw?

Countersunk screws are screws that have a conical head, which is designed to sink into the surface of the material being fastened. The conical shape of the head allows it to sit flush with the surface of the material, creating a smooth, finished appearance. Countersunk screws are commonly used in woodworking and metalworking applications where a flush finish is important or where the head of the screw may obstruct other materials or surfaces. They are available in a variety of materials and sizes, including wood, metal, and plastic, and may be driven by various tools, including screwdrivers, wrenches, or power drills. Some common types of countersunk screws include flat head, oval head, and angle head screws.