Wood Screw Finish Zinc Plated Material Steel Drive Square Screw Size #12 Fastener Length 2 1/2 in Head Width 0.438 in Head Height 0.132 in Drive Size #3 Pack Size Small Maximum Head Width 0.438 in Minimum Head Width 0.389 in System of Measurement Inch Head Type Flat Dimensional Standards ASME B18.6.1 Package Quantity 100