Socket Head Cap Screw, Head Type Standard, System of Measurement Inch, Drive Type Socket, Drive Size 5/16 in, Material Steel, Material Grade/Class ML40Cr, SCM435, Finish Black Oxide, Thread Size 3/8 In.-16, Minimum Thread Length 1 1/4 in, Fastener Length 4 in, Head Height 0.375 in, Head Diameter 0.562 in, Pack Size Small Pack, Thread Style Partially Threaded, Special Features Not Applicable, Color Black, Countersink Angle Not Applicable, Dimensional Standards ASME B18.3