Hex Head Cap Screw, System of Measurement Inch, Basic Material Steel, Material Grade Grade 2, Fastener Finish Zinc Plated, Dia. /Thread Size 5/16 In. -18, Fastener Length 5 1/2 in, Fastener Thread Direction Right Hand, Fastener Thread Type UNC (Coarse), Fastener Thread Style Partially Threaded, Fastener Industry Standards ASME B 18.2. 1, Head Type Hex, Min. Thread Length 7/8 in, Head Height 13/64 in, Head Width 1/2 in, Package Quantity 50. This item has been restricted from sale in the following state (s): []