Phillips bugle head, coarse thread, phosphate coated drywall screw. Application: Attaches gypsum board to wood studs or used in light duty wood to wood applications. Also used in particle board attachments. 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 • Meets ASTM C 1002 for attaching gypsum board to steel studs