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320CS - 2.75 Inch High Carbon Steel Extension Springs

Inventory Status
Estimated Lead Time

The 320CS is a regular extension spring manufactured by Century Spring. It is made from High Carbon steel and has a zinc finish. This spring has a wire diameter of 0.091 inches, an outside diameter of 0.75 inches, and a free length of 2.75 inches. It has an initial tension of 6 pounds and a maximum deflection of 1.2 inches. The 320CS has a spring rate of 21 lbs/inch and can handle a maximum load of 31 pound force. It features machine hook ends and is wound in a left direction.
Century Spring is proud to offer fast shipping and maintains a significant stock inventory. Our springs, including the 320CS, are made in the United States. With our reliable shipping and ample supply, Century Spring ensures that customers can quickly receive the springs they need for their projects.

Download CAD
Unit System
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 6 lb
Length 2.75 in
Material High Carbon Steel
Outside Diameter 0.75 in
Part Type Standard
Rate 21 lbs/in
SKU 320CS
Sugg Max Deflection 1.2 in
Sugg Max Load 31 lbf
Wind Direction Left
Wire Diameter 0.091 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 2.72 kg
Length 69.85 mm
Material High Carbon Steel
Outside Diameter 19.05 mm
Part Type Standard
Rate 3.68 N/mm
SKU 320CS
Sugg Max Deflection 30.48 mm
Sugg Max Load 137.89 N
Wind Direction Left
Wire Diameter 2.31 mm