U51096.031.0001 Square Nut, Material Grade/Class 18-8, Material Stainless Steel, Finish Plain, Thread Size 5/16 In.-18, Square Height 17/64 in, Square Width 9/16 in, System of Measurement Inch, Thread Direction Right Hand, Dimensional Standards ANSI/ASME B18.2.2, Pack Size Small Pack, Thread Type UNC, Package Quantity 25