#6, 1 5/8″ Phillips Bugle Head, Coarse Thread, Phosphate Coating is a type of drywall screws used to secure drywall to wood studs or joists. The screw size is #6 with a length of 1 5/8 inches and has a Phillips bugle head, coarse thread, and phosphate coating for improved grip and durability. It is commonly used in the construction industry for framing and drywall installation. Canada Fastening is a Canadian company that provides various types of fasteners, including screws, nails, bolts, and anchors for different applications.