U31860.021.0125 Self Drilling Screw, Finish Plain, Material 410 Stainless Steel, Head Type Hex Washer, Drive External Hex, Screw Size #12, Fastener Length 1 1/4 in, Drill Point Size 3, Drill Tip Length 23/64 in, Maximum Drilling Thickness 0.068 in, Head Width 0.312 in, Head Height 0.155 in, Washer Outside Diameter 0.432 in, Drive Size 5/16 in, Pack Size Small, System of Measurement Inch, Maximum Head Width 0.312 in, Minimum Head Width 0.305 in, Maximum Head Height 0.155 in, Minimum Head Height 0.139 in