Hex Nut, Hex Type Heavy Hex, Finish Black Oxide, Material Grade/Class Grade 2H, Material Steel, Thread Size 2 1/4 In. -8, Hex Width 3 1/2 in, Hex Height 2 1/4 in, Material Quality Standards ASTM A194, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Removable Yes, Rockwell Hardness C24 to C38, Thread Type Coarse/8UN. This item has been restricted from sale in the following state (s): []