Lock Nut, Finish NL-19, Material Stainless Steel, Material Grade/Class 316, Thread Size 5/16 In. -18, Hex Width 1/2 in, Hex Height 9/32 in, Lock Type Serrated, Dimensional Standards ASME B 18.2. 2, Material Quality Standards ASTM B 18.2. 2, System of Measurement Inch, Hex Type Flange Hex, Thread Direction Right Hand, Flange Diameter 0.5 in, Flange Thickness 0.12 in, Insert Material Stainless Steel, Pack Size Small Pack, Package Quantity 25. This item has been restricted from sale in the following state (s): []