#12 x 1 in. External Hex Washer Head Self-Drilling Screw Zinc (500 per Pack)

Has an indented top surface, 6-flat sides with a flat washer which project beyond the sides and provides a flat bearing surface. Accepts hex wrench. A tapping screw with spaced threads and a drill point which drills its own holes. All self drilling screws offer economical benefits, reduces labor and tooling costs, reduces or eliminates the need for drill and taps.|Zinc plated|Material: steel|Sold in packs of 500|5/16 in. hex drive|Highly versatile|Common project applications: roofing, HVAC, steel stud framing, gutters and register vents