Hex Nut, Hex Type Standard Hex, Finish Black Oxide, Material Grade/Class Grade 2, Material Steel, Thread Size 1 5/8 In. -12, Hex Width 2 7/16 in, Hex Height 1 25/64 in, Dimensional Standards ASME B 18.2. 2, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Removable Yes, Rockwell Hardness B68 to C32, Thread Type Fine. This item has been restricted from sale in the following state (s): []