Coupling Nut, Material Grade/Class Grade 2, Material Steel, Finish Zinc Plated, Thread Size M20 x 2.50, Thread Style Fully Threaded, Hex Width 1 in, Overall Length 2 1/4 in, Dimensional Standards ASME B18.2.2, RoHS Compliant, Material Quality Standards SAE J995, System of Measurement Metric, Thread Direction Right Hand, Pack Size Small Pack