5/16" x .043" x 3-7/16" Steel Extension Springs

Diameter: 5/16"
Diameter 2: .043"
Length: 3-7/16"
Material: Spring Steel
Nominal Size: SRM82
Type: Extension Spring
WireDiameter: .043 WG

Box of 6.

Extension springs are wire coils designed to become longer under load. Their turns are normally touching in the unloaded position, and they have a hook, loop or some other means of attachment at each end.