8 x 2 1/2 Flat Head (no nibs) Square Drive Deep Thread Wood Screw 2/3 Threaded Black Ox ABQU188 and the drive type is

and the drive type is hex

These 12-11 x 2 Unslotted Indented Hex Washer Self Tapping Screw Type A Full Threaded Zinc are designed for use in a variety of applications

which means that it turns counterclockwise to tighten

making them ideal for use in applications where frequent access to the rack is required

8 x 2 1/2 Flat Head (no nibs) Square Drive Deep Thread Wood Screw 2/3 Threaded Black Ox ABQU188 and the drive type isThese 8 x 2 1 2 Flat Head (no nibs) Square Drive Deep Thread Wood Screws 2 3 Threaded Black Ox are made of durable steel and feature a deep thread for maximum holding power. The flat head design sits flush with the surface of the wood, while the square drive prevents the screw from slipping during installation. These screws are perfect for a variety of woodworking applications, including framing, decking, and cabinetry. The black oxide finish provides