Self Drilling Tapping Screw, Finish Zinc Plated, Material Steel, Head Type Hex Washer, Drive External Hex, Screw Size 1/4 In., Fastener Length 2 in, Drill Point Size 3, Head Width 0.312 in, Head Height 0.181 in, Washer Outside Diameter 0.63 in, Drive Size 3/8 in, Pack Size Small, System of Measurement Inch, Maximum Head Width 0.312 in, Minimum Head Width 0.305 in, Application Sheet Metal, Head Color Silver, Package Quantity 50