Hex Nut, Hex Type Standard Hex, Finish Black Oxide, Material Grade/Class Grade 8, Material Steel, Thread Size 9/16 In.-12, Hex Width 7/8 in, Hex Height 31/64 in, Manufacturer Location Globally Sourced, Dimensional Standards ASME B18.2.2, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Rockwell Hardness C33 to C39, Thread Type UNC, Package Quantity 25