Machine Screw Head Type Flat Material Steel Finish Zinc Plated Drive Torx Thread Size #4-40 Fastener Length 1 in Head Width 0.212 in Head Height 0.067 in Drive Size T8 Dimensional Standards ASME B18.6.3 Pack Size Small Type Standard Machine Screw Washer Thickness - System of Measurement Inch Thread Type Coarse Package Quantity 100