Jam Nut, Hex Type Thin/Low Hex, Finish Black Oxide, Material Steel, Material Grade/Class Not Graded, Thread Size 1 3/4 In. -12, Hex Width 2 5/8 in, Hex Height 1 in, Dimensional Standards ASME B 18.2. 2, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Rockwell Hardness B68 to C32, Thread Type Fine. This item has been restricted from sale in the following state (s): []