Tamper Resistant Screw Head Type Button Material Steel Finish Black Oxide Drive Torx Thread Size #10-24 Fastener Length 1/2 in Head Width 0.361 in Head Height 0.101 in Drive Size T25 Dimensional Standards ASME B18.6.3 Pack Size Small Type Tamper Resistant Screw Maximum Head Width 0.361 in Minimum Head Width 0.347 in Maximum Head Height 0.101 in Minimum Head Height 0.091 in System of Measurement Inch Thread Type Coarse Package Quantity 50