Hex Nut Hex Type Heavy Hex Finish Black Oxide Material Grade/Class Grade C Material Steel Thread Size 1/2 In.-13 Hex Width 7/8 in Hex Height 31/64 in Manufacturer Location Globally Sourced Dimensional Standards ASME B18.6.3 Material Quality Standards ASTM A563 System of Measurement Inch Thread Direction Right Hand Pack Size Small Pack Rockwell Hardness B78 to C38 Thread Type UNC Package Quantity 25