Jam Nut Hex Type Heavy Hex Jam Finish Black Oxide Material Grade/Class Grade 2 Material Alloy Steel Thread Size 5/16 in Hex Width 13/64 in Hex Height 13/64 in Manufacturer Location Globally Sourced Material Quality Standards TCMA System of Measurement Inch Thread Direction Right Hand Color Black RoHS Compliant Yes Thread Type Coarse Package Quantity 10