Tamper Resistant Screw Head Type Round Finish Zinc Plated Material Steel Screw Size #8 Fastener Length 1/2 in Head Width 0.309 in Head Height 0.109 in Drive Size #8 Dimensional Standards ASME B18.6.4 Pack Size Small Minimum Head Height 0.094 in Minimum Head Width 0.287 in Maximum Head Height 0.109 in Maximum Head Width 0.309 in System of Measurement Inch Drive One-Way Package Quantity 100