Self Drilling Screw Finish Climaseal Material Steel Head Type Hex Washer Drive External Hex Screw Size #12 Fastener Length 7/8 in Drill Point Size 4 Drill Tip Length 3/8 in Maximum Drilling Thickness 0.25 in Head Width 0.313 in Head Height 0.193 in Washer Outside Diameter 0.415 in Drive Size 5/16 in Pack Size Small System of Measurement Inch Maximum Head Width 0.313 in Minimum Head Width 0.313 in