Male–Female Screws are specialty fasteners designed with an external thread on one end and an internal thread on the other. They are manufactured to ASTM, DIN, and ISO standards in carbon steel, stainless steel, and brass. These screws allow components to be stacked or connected in assemblies where adjustability and reusability are required. Their versatility makes them suitable for furniture, electronics, mechanical fittings, and architectural hardware. They provide a professional fastening solution where dual-threaded connections are needed.