Tapping Sheet Metal Screw Head Type Hex Washer Finish Zinc Plated Material Steel Screw Size #4 Fastener Length 1/4 in Head Width 0.212 in Head Height 0.06 in Dimensional Standards ASME B18.6.3 For Maximum Material Thickness 3/64 in Pack Size Small Minimum Head Height 0.049 in Minimum Head Width 0.191 in Maximum Head Height 0.06 in Maximum Head Width 0.212 in System of Measurement Inch Drive Slotted Point Type AB For Use in Systems Thread Forming Tapping Screw Type AB