Jam Nut, Hex Type Jam Hex, Finish Plain, Material Grade/Class 18-8, Material Stainless Steel, Thread Size 1/2 In. -13, Hex Width 3/4 in, Hex Height 21/64 in, Dimensional Standards ASME B 18.2. 2, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Thread Type Coarse, Package Quantity 50. This item has been restricted from sale in the following state (s): []