Hex Nut, Hex Type Standard Hex, Finish Plain, Material Grade/Class Grade 5, Material Steel, Thread Size 5/16 In.-18, Hex Width 1/2 in, Hex Height 17/64 in, Manufacturer Location Globally Sourced, Dimensional Standards ASME B18.2.2, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Rockwell Hardness C19 to C30, Thread Type UNC, Package Quantity 100