Coupling Nut, Material Grade/Class Grade 5, Material Steel, Finish Zinc Plated, Thread Size 5/16 In.-24, Thread Style Fully Threaded, Hex Width 1/2 in, Overall Length 1 1/8 in, Dimensional Standards ASME B18.2.2, RoHS Compliant, Material Quality Standards SAE J995, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Rockwell Hardness C32, Package Quantity 5