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