Hex Nut, Nut Style Hex Nut - Heavy, System of Measurement Inch, Basic Material Steel, Material Grade Grade C, Fastener Finish Plain, Fastener Thread Direction Right Hand, Dia. /Thread Size 1/2 In. -13, Fastener Thread Type UNC (Coarse), Width Across Flats 7/8 In., Nut Height 1/2 In., Nut Standards ASTM 563, Package Quantity 50. This item has been restricted from sale in the following state (s): []