Self-Drilling Screw, Finish Climaseal(TM), Material Steel, Head Type Hex Washer, Drive Internal Hex, Screw Size 1/4 in, Fastener Length 3 in, Drill Point Size 3, Drill Tip Length 1/2 in, Maximum Drilling Thickness 0.21 in, Head Width 0.375 in, Head Height 0.23 in, Washer Outside Diameter 0.5 in, Drive Size 3/8 in, Pack Size Small, System of Measurement Inch, Maximum Head Width 7/16 in, Minimum Head Width Not Applicable, Maximum Head Height 15/64 in, Minimum Head Height Not Applicable