Tapping Sheet Metal Screw Head Type Hex Washer Finish Zinc Plated Material Steel Screw Size 1/4 in Fastener Length 2 1/2 in Head Width 0.477 in Head Height 0.19 in Dimensional Standards ASME B18.6.3 Pack Size Small Minimum Head Width 0.442 in Maximum Head Width 0.477 in System of Measurement Inch Drive Slotted Package Quantity 100