Jam Nut, Hex Type Jam Hex, Finish Zinc Plated, Material Steel, Material Grade/Class Grade A, Thread Size 1/2 In.-13, Hex Width 3/4 in, Hex Height 5/16 in, Manufacturer Location Globally Sourced, Dimensional Standards ASME B18.2.2, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Rockwell Hardness C32, Thread Type Coarse, Package Quantity 50