Diameter: #10 Diameter 2: 11/32 Length: 1 Thickness: 1/8 Material: Steel Finish: Silver Ruspert Head Style: Hex Washer (5/16 Hex) Point Type: Drill Thread Length: Full Style: With Sealing Washer Type: Self-Drilling Screw Box of 100. A self-drilling screw or tek screw is similar to a sheet metal screw but it has a drill-shaped point to cut through the substrate to eliminate the need for drilling a pilot hole. Ideal for any project involving light gauge sheet metal awnings door and window frames gutters sheds.