Socket Flat Head Screw, Head Type Flat, System of Measurement Inch, Drive Type Socket, Drive Size 5/16 in, Material Alloy Steel, Finish Black Oxide, Thread Size 1/2 In. -13, Minimum Thread Length 1 1/4 in, Fastener Length 1 1/4 in, Head Height 0.251 in, Head Diameter 0.938 in, Pack Size Small Pack, Thread Style Fully Threaded, Special Features Not Applicable, Countersink Angle 82 Degrees, Dimensional Standards ASME B 18.3, Flange Diameter Not Applicable, Flange Thickness Not Applicable. This item has been restricted from sale in the following state (s): []