Hex Nut, Nut Style Hex Nut, System of Measurement Inch, Steel, Material Grade Grade 5, Fastener Finish Plain, Fastener Thread Direction Right Hand, Dia. /Thread Size 1/2 In. -13, Fastener Thread Type UNC (Coarse), Width Across Flats 3/4 in, Nut Height 7/16 in, Nut Standards ASME B 18.2. 2, Package Quantity 50. This item has been restricted from sale in the following state (s): []