Pan heads are slightly rounded with short vertical sides. Pan head self tapping screws are fasteners that are designed to tap their own hole as they are screwed into wood, plastic or metal. Pan head self tapping screw could be fasten by using a screw driver or bit. Self-tapping screws is used, where precisely fitted threads are required. Self-tapping screws are ideal for items that require regular maintenance and work well when working with two different kinds of material being fastened together.