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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-551CS - 1.50 Inch 302/304 Stainless Steel Extension Springs

Inventory:           
Estimated Lead Time

The S-551CS is an extension spring manufactured by Century Spring. It is made from 302/304 Stainless Steel and has a plain finish. This spring has a wire diameter of 0.026 inches, an outer diameter of 0.312 inches, and a free length of 1.5 inches. It has an initial tension of 0.2 Pound and a maximum deflection of 3.1 inches. The S-551CS has a spring rate of 0.55 lbs/inch and a maximum load of 1.9 Pound Force. It features machine hook ends and is suitable for various applications.

Century Spring offers fast shipping and maintains a significant stock inventory. We are proud to manufacture our products, including the S-551CS, 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
A) Brand Century Spring
B) Sku S-551CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.026 in
F) Outside Diameter 0.312 in
G) Length 1.5 in
H) End Type Machine Hook
I) End Position Random
J) Rate 0.55 lbs/in
K) Initial Tension 0.2 lb
L) Sugg Max Deflection 3.1 in
L) Sugg Max Load 1.9 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku S-551CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.66 mm
F) Outside Diameter 7.92 mm
G) Length 38.1 mm
H) End Type Machine Hook
I) End Position Random
J) Rate 0.1 N/mm
K) Initial Tension 0.09 kg
L) Sugg Max Deflection 78.74 mm
L) Sugg Max Load 8.45 N
O) Finish None