Jam Nut, Hex Type Heavy Jam, Finish Plain, Material Grade/Class 18-8, Material Stainless Steel, Thread Size 1/2 In. -13, Hex Width 7/8 in, Hex Height 19/64 in, Dimensional Standards ASME B 18.2. 2, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Thread Type UNC, Package Quantity 25. This item has been restricted from sale in the following state (s): []