Countersunk and non countersunk are two basic types of screw head designs. Non countersunk heads include bundling heads, button heads, cylindrical heads, rounded heads, flange heads, hexagonal heads, pan heads, circular, square, truss heads, etc., while countersunk head designs mainly include flat heads, ellipses, and horn heads.
The countersunk screw head is designed to be flush with or slightly below the surface of the material after complete installation. It has a conical shape with a conical groove at the top. The purpose of a countersunk hole is to create a smooth and uniform surface after tightening the screw. When the countersunk screw is fully installed, the head will be flush with or slightly below the surface of the material, achieving a more seamless appearance. Countersunk screws are typically used when a flat and smooth surface is required, and they are commonly used in woodworking, cabinets, and applications that prioritize aesthetics and clean lines.
On the other hand, non countersunk screw heads do not have a conical shape or a concave top, with the head completely exposed. Their design purpose is not to be flush with the surface of the material. On the contrary, they have larger, flat, or circular heads that are still visible once the screw is fully tightened. When the appearance of the screw is not a concern and it is acceptable or necessary to use protruding or raised heads, non countersunk screw heads are usually used. These screws are typically used in construction, metalworking, and applications that prioritize strength, durability, and functionality over aesthetics.
Post time: Jan-02-2025