Cap Nut, Profile Low Crown, Material Grade/Class 18-8, Material Stainless Steel, Finish Plain, Thread Size 5/8 In.-18, Overall Height 1 in, Hex Width 15/16 in, Tensile Strength 85,000 psi, Dimensional Standards SAE J483, Material Quality Standards AISI Grade 303, ASTM, System of Measurement Inch, Color Gray, Pack Size Small Pack, Rockwell Hardness B83 to B95, Thread Direction Right Hand, Package Quantity 2