Lock Nut, Finish Black Oxide, Material Steel, Material Grade/Class Grade 8, Thread Size 1 1/2 In.-12, Hex Width 2 1/4 in, Hex Height 1 43/64 in, Lock Type Nylon Insert, Dimensional Standards ASME B18.16.6, System of Measurement Inch, Hex Type Standard Hex, Thread Direction Right Hand, Pack Size Small Pack, Package Quantity 5