Square flat head with nibs particle board screw, typ-17. black oxide. Black Oxide is a conversion coating that is used to add mild corrosion resistance and for appearance. Square drive prevents cam out and stripping. Type ‘17’ reduces wood splitting and eliminates the need for pre-drilling. Asymmetrical thread pattern. Superior holding power. Application: Wood screw for interior wood applications. Attaches wood to wood. Installation: A standard screw gun with torque limiting nose piece set at a maximum of 3000 RPM drive speed recommended. Use a #2 reduced Square drive bit. The fastener is completely installed when the fastener head is seated flush with the work surface. Do not over torque as it can cause the head to snap or damage to the work surface. Specifications: • Meets ASTM1 A 510 for carbon steel manufacturing • Meets ASTM B 633 for electrodeposited zinc coatings • Meets ASTM F1941 for corrosion resistance