A cap screw is a type of fastener that features a cylindrical head and is designed to be tightened with a wrench. It typically has a fully threaded shaft, allowing it to be used in various applications where strong clamping force is required. Cap screws are commonly made from materials like steel or stainless steel, providing durability and resistance to corrosion. These fasteners are often used in machinery, automotive, and construction applications. They can be found in different sizes and grades, which determine their strength and suitability for specific tasks. Proper installation and torque are essential to ensure their effectiveness in holding components together securely.