Machine Screw, Head Type Hex, Material Steel, Finish Zinc-Plated, Drive External Hex, Thread Size #12-24, Fastener Length 1/2 in, Head Width 0.313 in, Head Height 0.155 in, Drive Size Not Applicable, Tensile Strength Not Applicable, Dimensional Standards ASME B 18.6. 3, Pack Size Small, Minimum Thread Length Not Applicable, Type Machine Screw, Washer Outside Diameter Not Applicable, Washer Thickness Not Applicable, Maximum Head Width 5/16 in, Minimum Head Width Not Applicable. This item has been restricted from sale in the following state (s): []