Jam Nut, Hex Type Jam Hex, Finish Plain, Material Stainless Steel, Material Grade/Class 18-8, Thread Size 5/16 In.-24, Hex Width 1/2 in, Hex Height 3/16 in, Dimensional Standards ASME B18.2.2, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Rockwell Hardness B95 to C35, Thread Type Fine, Package Quantity 100