Wood Screw Finish Zinc Plated Material Steel Drive Slotted Screw Size #4 Fastener Length 1/2 in Head Width 0.225 in Head Height 0.067 in Drive Size #1 Threads per Inch 22 Pack Size Small Maximum Head Width 0.225 in Minimum Head Width 0.195 in System of Measurement Inch Head Type Flat Dimensional Standards ASME B18.6.1 Package Quantity 100