Lock Nut Finish Zinc Yellow Material Steel Material Grade/Class Grade 8 Thread Size 9/16 In.-12 Hex Width 7/8 in Hex Height 31/64 in Lock Type Nylon Insert Dimensional Standards ASME B18.16.6 System of Measurement Inch Hex Type Standard Hex Thread Direction Right Hand Pack Size Small Pack Rockwell Hardness C26--34 Package Quantity 25