Coupling Nut, Material Grade/Class 18-8, Material Stainless Steel, Finish Plain, Thread Size 5/8 In.-18, Thread Style Fully Threaded, Hex Width 13/16 in, Overall Length 2 1/8 in, Dimensional Standards ASME B18.2.2, Material Quality Standards ASTM A582, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Package Quantity 2