The most common screw head types include pan head, round head, and hex head.

• A. False
• B. True
• C. The only common head type is pan head
• D. Hex head is not common

Answer: (B)

Fasteners come in a few head shapes because each shape serves different seating and driving needs. Pan head, round head, and hex head are among the most commonly seen types, so the statement is true. Pan head screws have a flat bearing surface with a rounded top, making them useful where a low-profile head is desired and tool clearance matters. Round head screws are fully domed, offering a smooth, rounded appearance and good seating for certain applications. Hex head screws are driven with a wrench or socket and are favored for high torque and strong grip. Since these three appear frequently in catalogs and everyday metalworking, they’re rightly described as among the most common, even though other head types exist. The other options misunderstand commonality or exclusivity, which is why they don’t fit.