Jam Nut, Hex Type Jam Hex, Finish Zinc Plated, Material Steel, Material Grade/Class Grade A, Thread Size 1 1/4 In.-12, Hex Width 1 27/32 in, Hex Height 3/4 in, Dimensional Standards ASME B18.2.2, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Thread Type Fine