Specialized female-threaded fasteners designed to connect two male threads of the same diameter, often used with threaded rod. Known as extension nuts or long nuts, these components are essential for extending bolted connections in various applications, such as building braces and tie-down systems. Featuring a hexagonal head design, these nuts are easily adjusted with a wrench. They come in several finishes, including plain, hot dip galvanized, and zinc, to suit various requirements. Stainless steel variants also provide flexibility for a range of project needs.