Thread cutting screw with type 25 point has coarse threads that taper down to a blunt edge with a large cutting surface, provides excellent chip clearance, and is suitable for use in plastics and other soft materials
Steel is often used in applications where strength is the primary consideration
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