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100 YRS

The Countdown to 100 Years of Century Spring!

Since 1927, Century Spring Corp has been the original industry-leading spring manufacturer for both stock and custom springs. Read about 100 Years of Century Spring here.

167 DAYS

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

Inventory:           
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.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku S-578CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.054 in
F) Outside Diameter 0.437 in
G) Length 4 in
H) End Type Machine Hook
I) End Position Random
J) Rate 3.1 lbs/in
K) Initial Tension 2 lb
L) Sugg Max Deflection 3.1 in
L) Sugg Max Load 12 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku S-578CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 1.37 mm
F) Outside Diameter 11.1 mm
G) Length 101.6 mm
H) End Type Machine Hook
I) End Position Random
J) Rate 0.54 N/mm
K) Initial Tension 0.91 kg
L) Sugg Max Deflection 78.74 mm
L) Sugg Max Load 53.38 N
O) Finish None