5/16-18 x 1-3/4" long, 1/2" across the flats steel coupling nut with zinc finish Coupling nuts are threaded fasteners for joining two male threads, most commonly threaded rod Zinc plate over steel - more rust resistant Coupling Nuts are used to make up long rod assemblies from shorter lengths of rods Package include: 12 x Hex Coupling Nut

5/16-18 X 1-3/4" Long Hex Coupling Nut - 5/16-18 1-3/4" long, 1/2" across the flats steel coupling nut with zinc finish. Welcome to Magic Hub store. Your satisfaction is our priority. If there are any questions before and after purchase, please welcome to contact us, we will try my best to solve all for you.