Which type of screw head is characterized by a flat top and angled sides?

The screw head characterized by a flat top and angled sides is known as a countersunk screw head. This design allows the screw to sit flush with or below the surface of the material it is being driven into, which is particularly beneficial in applications where a smooth finish is desired. The angled sides enable the screw to be driven into a pre-drilled hole that is conical in shape, effectively allowing for a neat and streamlined appearance.

In various applications, countersunk screws are often used in woodworking, cabinetry, and other scenarios where a screw may otherwise protrude and create an uneven surface. This feature makes them ideal for aesthetic purposes and functional finishes, where a flat surface is necessary for safety or design.

In contrast, other types of screw heads, such as pan heads and cheese heads, have different shapes that do not allow for a flush finish. Pan heads are rounded with a flat bottom, while cheese heads have a distinct shape that typically doesn't offer the same function of countersinking. Raised countersunk heads exist but are less common and do not fit the description of having a completely flat top.