Coupling Nut Material Grade/Class Grade 8 Material Steel Finish Zinc Plated Thread Size 7/8 In.-9 Thread Style Fully Threaded Hex Width 1 5/16 in Overall Length 2 1/2 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 C24-C34