Self Drilling Tapping Screw Finish Zinc Plated Material Steel Head Type Hex Washer Drive External Hex Screw Size #8 Fastener Length 1 1/2 in Drill Point Size 2 Drill Tip Length 7/32 in Maximum Drilling Thickness 0.136 in Head Width 0.25 in Head Height 0.11 in Washer Outside Diameter 0.348 in Drive Size 1/4 in Pack Size Small System of Measurement Inch Maximum Head Width 0.25 in Minimum Head Width 0.244 in Maximum Head Height 0.11 in Minimum Head Height 0.096 in