Castle Nut, Finish Black Oxide, Material Steel, Material Grade/Class Grade 2H, Thread Size 1 1/4 In.-7, Hex Width 2 in, Hex Type Heavy Hex, Lock Type Slotted Castle, Dimensional Standards ASME B18.2.2, Material Quality Standards ASTM A1194 Gr.2H, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack