Phil Square Flat w/Nibs Coarse Thread Wood Screw 2 Type 17 2/3 Thread Black Oxide

An externally threaded fastener with a countersunk head, a crossed recess that will also accept a square drive bit, and a single lead thread. The nibs on the underside of the head aid in the countersinking process by removing additional material. The shank has a reduces diameter and two chips cavities: cut out where the final several threads, ending at the tip, and a second cavity above the first but on the opposite side of the threaded shank