Self Drilling Screw Finish Climaseal Material Steel Head Type Hex Washer Drive External Hex Screw Size #12 Fastener Length 2 1/2 in Drill Point Size 3 Drill Tip Length 7/16 in Maximum Drilling Thickness 0.21 in Head Width 0.313 in Head Height 0.19 in Washer Outside Diameter 0.415 in Drive Size 3/8 in Pack Size Small System of Measurement Inch Maximum Head Width 0.313 in Minimum Head Width 0.313 in