Coupling Nut, Finish Zinc Plated, Material Grade/Class Grade 2, Material Steel, Thread Size 3/4 In.-6, Hex Width 1 in, Material Quality Standards ASTM A108, System of Measurement Inch, Thread Direction Right Hand, Rockwell Hardness 80 HRB min., Thread Pitch 0.167 in, Thread Type Acme, Package Quantity 4