Machine Screw Head Type Flat Material 18-8 Stainless Steel Finish Plain Drive Slotted Thread Size 1/2 In.-13 Fastener Length 3 1/2 in Head Width 0.815 in Head Height 0.223 in Tensile Strength 60 000 psi Dimensional Standards ASME B18.6.3 Pack Size Small Type Standard Machine Screw Washer Outside Diameter Not Applicable Washer Thickness Not Applicable Maximum Head Width 0.815 in Minimum Head Width 0.815 in Maximum Head Height 0.223 in Minimum Head Height 0.223 in