1OPERATING PROCESS: Our female threaded cylindrical coupling nut is designed to hold two parts together, usually a threaded rod. 2MADE BY 304 STAINLESS STEEL: Female threaded cylindrical coupling nut is made of 304 stainless steel, excellent performance, and can be used stably. 3CORROSION AND RUST RESISTANCE: Female threaded coupling nut has good rust, corrosion resistance and durability, suitable for indoor or outdoor use. 4RUGGED AND PRACTICAL: The female thread coupling nut kit is overall rugged and durable, which can give you better using experience. 5WIDE APPLICABLE SCENARIO: Female thread coupling nuts are widely used in home decoration, machinery maintenance, equipment maintenance, pipe maintenance, etc.