Double-ended studs are threaded fasteners with threads on both ends and an unthreaded shank in the middle. They are designed to connect two components, often with one end screwed into a tapped hole and the other secured with a nut. These studs are commonly used in applications requiring strong, secure connections, such as automotive, machinery, and construction industries.

Double-ended studs are made from a variety of materials, including carbon steel, stainless steel, brass, and alloys like titanium or Inconel. The choice of material depends on the application's requirements, such as corrosion resistance, strength, and temperature tolerance. For example, stainless steel studs are ideal for corrosive environments, while alloy steels handle high-stress applications.

These studs are used in situations where components need to be securely fastened but allow for easy disassembly. Applications include connecting flanges, securing cylinder heads in engines, and assembling heavy machinery. Their design ensures a strong, reliable connection while allowing maintenance or part replacement without damaging the components.