Check the listing for details. 3/8"x16 Coupling Nuts, 6 Pcs Carbon Steel Hex Rod Coupling Nuts, White. Condition: New. Listed at 10.66 USD. Description:[Material] Made of carbon steel, the coupling nuts has a smooth surface without burrs, and are corrosion-resistant and high-temperature resistant. It has high hardness, is strong and durable, and is not easy to deform.[Features] The hex rod coupling nuts adopt a six-sided design, which is easy to grip and can achieve maximum torque, allowing you to tighten easily and efficiently. It is used to install bolts or machine screws to connect two fasteners or accessories completely, the most common ones have threaded rods[Easy to Install] Coupling nuts are easy to install and only need to be tightened with a wrench to assemble and connect two parts and be careful not to over-tighten.[Wide Application] Coupling nuts can be widely used in furniture repair, office equipment, automobile, mechanical industry, communication equipment, etc.