Coupling Nut, Material Grade/Class Grade 2H, Material Steel, Finish Plain, Thread Size 1/4 In. -20, Thread Style Fully Threaded, Hex Width 1/2 in, Overall Length 7/8 in, Dimensional Standards ASME B 18.2. 2, Material Quality Standards ASTM A194 2H, System of Measurement Inch, Thread Direction Right Hand, Pack Size Small Pack, Rockwell Hardness 28 Min, Sight Hole No