Self Drill Screw Finish Zinc Plated Material Steel Head Type Hex Washer Drive External Hex Screw Size 1/4 in Fastener Length 3/4 in Drill Point Size 3 Drill Tip Length 5/16 in Head Width 0.366 in Head Height 0.253 in Washer Outside Diameter 0.476 in Drive Size 3/8 in Pack Size Small System of Measurement Inch Head Color Silver Package Quantity 300