Hex Nut, Hex Type Heavy Hex, Finish Plain, Material Grade/Class Grade 8M, Material Stainless Steel, Thread Size 5/8 In.-11, Manufacturer Location Globally Sourced, Material Quality Standards ASTM A194, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Rockwell Hardness B60 to B105, Thread Type Coarse/8UN, Package Quantity 200