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
• Spanner, also known as snake eyes, drive types feature two holes on the head designed to provide security and prevent tampering
• Spanner fasteners require a special driver to tighten or loosen
• Stainless steel is a strong, corrosion-resistant alloy with excellent resistance to heat
• It is used in high-stress, outdoor and corrosive applications
• Type A screws have sharp points and coarse threads
• They are used to cut threads in drilled or punched holes in thin sheet metal.