Self Drilling Screw Sheet Metal Hex Washer Head 410 Stainless Steel Plain Finish Size #12 Length 2 In Width of Hex Head 0.312 In Head Height 0.155 In Washer O 0.432 Washer O Drill Point Size #3 Drill Point Length 9/32 In For Attaching Variety of Materials to Metal Up to 10 Gauge Meets/Exceeds SAE J78 Package 25