Hex Nut, Hex Type Standard Hex, Finish Black Oxide, Material Grade/Class Not Graded, Material Steel, Thread Size 3/8 In.-24, Hex Width 9/16 in, Hex Height 21/64 in, System of Measurement Inch, Thread Direction Left Hand, Pack Size Small Pack, Removable Yes, Rockwell Hardness B68 to C32, Thread Type Fine, Package Quantity 100