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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.

201 DAYS

S-520CS - 1.25 Inch 302/304 Stainless Steel Extension Springs

Inventory:           
Estimated Lead Time

The S-520CS is a regular extension spring manufactured by Century Spring. It is made from 302/304 Stainless Steel, ensuring durability and resistance to corrosion. This spring has a wire diameter of 0.018 Inch and an outside diameter of 0.188 inches. It has a free length of 1.25 Inch and a maximum deflection of 2.3 inches. The S-520CS has an initial tension of 0.1 Pound and a spring rate of 0.36 lbs/inch. With a maximum load of 0.95 Pound Force, this extension spring is suitable for a variety of applications. It features full loop ends, providing secure attachment points.

At Century Spring, we prioritize fast shipping and maintain a significant stock inventory. We are proud to manufacture our springs in the United States, ensuring high-quality products. Whether you need springs for industrial, automotive, or household applications, Century Spring is dedicated to delivering reliable and efficient service. With our extensive inventory and efficient shipping processes, you can trust us to provide the springs you need, when you need them.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku S-520CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.018 in
F) Outside Diameter 0.188 in
G) Length 1.25 in
H) End Type Full Loop
I) End Position Random
J) Rate 0.36 lbs/in
K) Initial Tension 0.1 lb
L) Sugg Max Deflection 2.3 in
L) Sugg Max Load 0.95 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku S-520CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.46 mm
F) Outside Diameter 4.78 mm
G) Length 31.75 mm
H) End Type Full Loop
I) End Position Random
J) Rate 0.06 N/mm
K) Initial Tension 0.05 kg
L) Sugg Max Deflection 58.42 mm
L) Sugg Max Load 4.23 N
O) Finish None