Coupling Nut, Material Grade/Class Grade 2H, Material Steel, Finish Black Oxide, Thread Size 3/4 In.-10, Thread Style Fully Threaded, Hex Width 1 1/4 in, Overall Length 2 1/4 in, Dimensional Standards ASME B18.2.2, Material Quality Standards ASTM A194 2H, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Rockwell Hardness 28 Min