Tap Bolt, System of Measurement Inch, Basic Material Steel, Material Grade A307A, Fastener Finish Zinc Plated, Dia./Thread Size 5/8 In.-11, Fastener Length 3 1/4 in, Fastener Thread Direction Right Hand, Fastener Thread Type UNC (Coarse), Fastener Thread Style Fully Threaded, Fastener Industry Standards ASME B18.2.1, Head Type Hex, Head Height 27/64 in, Head Width 0.9375 in, Package Quantity 5