Self Drilling Screw Sheet Metal Hex Washer Head Case-Hardened Steel Zinc Finish Size #10 Length 1 In Driver Size 5/16 In Width of Hex Head 0.305 In Head Height 0.105 In Washer Dia 0.384 In Drill Point Size #3 Drill Point Length 0.300 In For Attaching Variety Of Materials To Metal Up To 7 Gauge Meets/Exceeds SAE J78 Package 130