Lock Nut Finish Plain Material Stainless Steel Material Grade/Class 18-8 Thread Size 5/8 In.-18 Hex Width 15/16 in Hex Height 3/4 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 B80 to C32 Package Quantity 10