Jam Nut, Hex Type Jam Hex, Finish Zinc Yellow, Material Steel, Material Grade/Class Grade 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, Thread Type Fine, Package Quantity 25