Coupling Nut Supply is a U.S. manufacturer specializing in standard and specialty fasteners, including reducer coupling nuts, standard coupling nuts, heavy hex nuts, and custom spacers. With over 40 years of experience in the fastener industry, they offer responsive solutions, quality products, competitive pricing, and customer loyalty. The company operates from multiple stocking warehouses across the U.S. and focuses on engineering and implementing production machine solutions. Coupling Nut Supply serves various industries such as bridge construction, power plants, building construction, road construction, and electrical fixtures, with a strong emphasis on customer loyalty and quality management.