Hex Head Cap Screw System of Measurement Inch Basic Material Steel Material Grade Grade 8 Fastener Finish Zinc Yellow Dia./Thread Size 7/16 In.-20 Fastener Length 3 1/4 in Fastener Thread Direction Right Hand Fastener Thread Type UNF (Fine) Fastener Thread Style Partially Threaded Fastener Industry Standards ASME B18.2.1 Head Type Hex Min Thread Length 1 1/8 in Head Height 9/32 in Head Width 5/8 in Package Quantity 10