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S-578CS - 4 Inch 302/304 Stainless Steel Extension Springs

Inventory Status
Estimated Lead Time

The S-578CS is a regular extension spring manufactured by Century Spring. It is made from 302/304 stainless steel and has a natural finish. This spring has a wire diameter of 0.054 inch and an outside diameter of 0.437 inches. It has a free length of 4 inches and an initial tension of 2 pounds. The S-578CS has a spring rate of 3.1 lbs/inch and a maximum deflection of 3.1 inches. It can handle a maximum load of 12 pound force. This spring features machine hooks on both ends for easy installation. It is a reliable and durable option for various extension spring applications.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand the importance of timely delivery, which is why we ensure that our products, including the S-578CS, are promptly shipped to our customers. Additionally, we are proud to say that all our springs are made in the United States. Our commitment to quality and customer satisfaction is reflected in our reliable shipping and our dedication to producing high-quality springs right here in the USA. Trust Century Spring for all your spring needs.

Unit System
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish None
Initial Tension 2 lb
Length 4 in
Material 302/304 Stainless Steel
Outside Diameter 0.437 in
Part Type Standard
Rate 3.1 lbs/in
SKU S-578CS
Sugg Max Deflection 3.1 in
Sugg Max Load 12 lbf
Wind Direction Left
Wire Diameter 0.054 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish None
Initial Tension 0.91 kg
Length 101.6 mm
Material 302/304 Stainless Steel
Outside Diameter 11.1 mm
Part Type Standard
Rate 0.54 N/mm
SKU S-578CS
Sugg Max Deflection 78.74 mm
Sugg Max Load 53.38 N
Wind Direction Left
Wire Diameter 1.37 mm