A stainless steel tension spring is a type of mechanical spring made from stainless steel material that is designed to generate tension or resist pulling forces when stretched. Tension springs are typically coiled springs with a helical shape, and they are commonly used in various applications that require tensioning or counterbalancing, such as in door hinges, suspension systems, and industrial machinery.

Stainless steel is a popular material choice for tension springs due to its high strength, corrosion resistance, and durability. It can withstand harsh environmental conditions and can maintain its mechanical properties over time, making it suitable for applications in which the spring will be exposed to moisture, chemicals, or other harsh elements.