Overview

• Flat head fasteners have flat surfaces that taper toward the screw body to allow for countersinking
• The flat head lies flush against the workpiece
• Phillips drive types have a cross-shaped slot and are used with Phillips drivers
• Steel is strong and durable but less corrosion resistant than stainless steel
• To improve its resistance to corrosion, it may receive additional finishes and coatings
• Type A/AB screws have sharp points and spaced threads that cut threads in thin sheet metal
• They can also be used in wood and composite materials.