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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-550CS - 1.38 Inch 302/304 Stainless Steel Extension Springs

Inventory:           
Estimated Lead Time

The S-550CS 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 0.041 inches, an outside diameter of 0.312 inches, and a free length of 1.38 inches. It has an initial tension of 1 Pound and a maximum deflection of 0.84 inches. The S-550CS has a spring rate of 7.4 lbs/inch and a maximum load of 7.6 Pound Force. It is equipped with machine hooks on both ends, allowing for easy installation. The S-550CS is a reliable extension spring suitable for a variety of applications.

Century Spring offers fast shipping and maintains a significant stock inventory. We take pride in manufacturing our products, including the S-550CS, in the United States. With our efficient shipping process and ample supply, Century Spring ensures that you can quickly receive the high-quality springs you need for your projects.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku S-550CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.041 in
F) Outside Diameter 0.312 in
G) Length 1.38 in
H) End Type Machine Hook
I) End Position Random
J) Rate 7.4 lbs/in
K) Initial Tension 1 lb
L) Sugg Max Deflection 0.84 in
L) Sugg Max Load 7.6 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku S-550CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 1.04 mm
F) Outside Diameter 7.92 mm
G) Length 35.05 mm
H) End Type Machine Hook
I) End Position Random
J) Rate 1.3 N/mm
K) Initial Tension 0.45 kg
L) Sugg Max Deflection 21.34 mm
L) Sugg Max Load 33.8 N
O) Finish None