Hex Nut, Hex Type Heavy Hex, Finish Black Oxide, Material Grade/Class Grade 2, Material Alloy Steel, Thread Size 5/16 In.-18, Hex Width 9/16 in, Hex Height 19/64 in, Manufacturer Location Globally Sourced, Material Quality Standards ASTM A194, System of Measurement Inch, Thread Direction Right Hand, Color Black, RoHS Compliant Yes, Thread Type Coarse, Package Quantity 10