Machine Screw Head Type Flat Material Steel Finish Zinc Plated Drive Torx Thread Size #10-24 Fastener Length 1 1/4 in Head Width 0.385 in Head Height 0.116 in Drive Size T20 Dimensional Standards ASME B18.6.3 Pack Size Small Type Standard Machine Screw Washer Thickness - System of Measurement Inch Thread Type Coarse Package Quantity 50