Sheet Metal Screw, Head Type Hex Washer, Finish Phosphate, Material Steel, Screw Size 1/4 in, Fastener Length 3/4 in, Head Width 0.375 in, Head Height 0.25 in, Drive Size 3/8 in, Dimensional Standards Not Applicable, For Maximum Material Thickness Not Applicable, Pack Size Small, Minimum Head Height Not Applicable, Minimum Head Width Not Applicable, Maximum Head Height 1/4 in, Maximum Head Width 3/8 in, System of Measurement Inch, Drive Slotted, For Use in Systems Not Applicable