Machine Screw Head Type Flat Material 18-8 Stainless Steel Finish Plain Drive Slotted Thread Size #4-40 Fastener Length 1/2 in Head Width 0.212 in Head Height 0.067 in Tensile Strength 60 000 psi Dimensional Standards ASME B18.6.3 Pack Size Small Type Standard Machine Screw Washer Thickness - Maximum Head Width 0.212 in Minimum Head Width 0.191 in System of Measurement Inch Thread Type Coarse Package Quantity 100