Phillips bugle head, coarse thread, zinc yellow. The Zinc Yellow coating prevents the oxidation of steel by forming a protective barrier. Application: Multi-purpose screw for interior or outdoor applications. Attaches gypsum board or wood to wood. 24/hr. salt spray resistance. Used in low corrosion applications. Installation: A standard screw gun with torque limiting nose piece set at a maximum of 3000 RPM drive speed recommended. Use a #2 reduced Phillips 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 • Product meets ASTM B-117 for salt spray corrosion testing