5pcs High-strength and High-elasticity Carbon Spring Steel Compression Springs with Both Ends Ground Flat, Wire Diameter 4mm, Outer Diameter 20mm, Length 20-150mm, 4x20x90mm

Size expression: CS * AD * Free Length(Wire Dia * Outer Dia * Length) Made of high-strength and high-elastic carbon spring steel, it can quickly return to its original shape after being stressed, allowing the compression spring to maintain stable elastic properties during long-term use This compression spring has undergone heat treatment and high-pressure treatment and is not prone to problems such as deformation and breakage Both ends of the spring are ground flat to reduce stress concentration, improve connection stability, and reduce installation difficulty Widely used in washing machines, valves, ladders, industrial machinery, mining machinery, etc.