Type B point has a blunt tip with fine spaced threads that are suitable for forming threads in holes drilled in 0.015"- to 0.050"-thick metals as well as nonferrous castings, plastics, and impregnated plywood
Steel is often used in applications where strength is the primary consideration, and the zinc plating resists corrosion and has a reflective appearance
Pan head has a flat top and short vertical sides with a rounded top edge
Star drive has a six-pointed indentation that provides a large contact area for the driver, resisting slippage better than a Phillips or slotted drive