System of Measurement Inch, Heavy Hex Bolt, Head Type - Bolts Hex, Basic Material Steel, Material Grade A307B, Fastener Finish Hot Dipped Galvanized, Dia./Thread Size 5/8 In.-11, Fastener Length 2 in, Fastener Thread Direction Right Hand, Fastener Thread Type UNC (Coarse), Fastener Industry Standards ASME B18.2.1, Min. Thread Length 1 1/2 in, Fastener Thread Style Partially Threaded, Head Height 27/64 in, Head Width 1 1/16 in, Package Quantity 90