5/16″ x .040″ x 2-1/8″ Steel Compression Springs (12 pcs.)
Diameter: 5/16″ Diameter 2: .040″ Length: 2-1/8″ Material: Spring Steel Nominal Size: SRM163 Type: Compression Spring WireDiameter: .040 WG Box of 12. Compression springs are coils designed to become shorter when loaded. Their turns are not touching in the unloaded position, and they need no attachment points.