Hex Nut Hex Type Standard Hex Finish Black Oxide Material Grade/Class Grade 8 Material Steel Thread Size 2 1/4 In.-12 Hex Width 3 3/8 in Hex Height 1 15/16 in Manufacturer Location Globally Sourced Dimensional Standards ASME B18.2.2 System of Measurement Inch Thread Direction Right Hand Pack Size Small Pack Removable Yes Rockwell Hardness C26 to C36 Thread Type Coarse