Hillman 47430 Stainless Steel Square Drive Deck Screw, 8 X 1-5/8-Inch, 172 pack 172 pieces per package Stainless steel screws provide the best in corrosion and stain protection Flat head with nibs remove material to ensure the head lies flat in your material Course threading and type 17 point is self drilling to prevent splitting Square drive is more durable than Philips head to prevent stripping