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