Hex Head Cap Screw, System of Measurement Inch, Basic Material Steel, Material Grade A307A, Fastener Finish Zinc Plated, Dia./Thread Size 1/2 In.-13, Fastener Length 4 1/2 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 11/32 in, Head Width 3/4 in, Package Quantity 5