Hex Head Cap Screw System of Measurement Inch Basic Material Steel Material Grade Grade 8 Fastener Finish Plain Dia./Thread Size 5/16 In.-24 Fastener Length 5/8 in Fastener Thread Direction Right Hand Fastener Thread Type UNF (Fine) Fastener Thread Style Fully Threaded Fastener Industry Standards ASME B18.2.1 Head Type Hex Min Thread Length 5/8 in Head Height 13/64 in Head Width 1/2 in Package Quantity 100