Coupling Nut, Hex Type Coupling, Finish Black Oxide, Material Grade/Class Grade 2, Material Steel, Thread Size 3/4 In.-5, Hex Width 1 in, Material Quality Standards ASTM A108, System of Measurement Inch, Thread Direction Right Hand, Rockwell Hardness 80 HRB min., Thread Pitch 0.2 in, Thread Type Coarse, Package Quantity 5