Coupling Nut Material Grade/Class Grade 5 Material Steel Finish Zinc Plated Thread Size 5/8 In.-11 Thread Style Fully Threaded Hex Width 13/16 in Overall Length 2 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 2