Hex Nut, Hex Type Heavy Hex, Finish Hot-Dipped Galvanized, Material Grade/Class Not Graded, Material Steel, Thread Size 1/2 In. -13, Hex Width 7/8 in, Hex Height 31/64 in, Material Quality Standards ASTM 563, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Removable Yes, Rockwell Hardness C24 to C38, Thread Type Coarse, Package Quantity 50. This item has been restricted from sale in the following state (s): []