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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.

191 DAYS

621CS - 8 Inch High Carbon Steel Extension Springs

Inventory:           
Estimated Lead Time

The 621CS is a regular extension spring manufactured by Century Spring. It is made from High Carbon steel and has a zinc finish. This spring has a wire diameter of 0.207 inches, an outside diameter of 2 inches, and a free length of 8 inches. It has an initial tension of 22 Pound and a maximum deflection of 5.4 inches. The 621CS has a spring rate of 18 lbs/inch and a maximum load of 120 Pound Force. It features machine hook ends and is suitable for various extension spring applications.

At Century Spring, we understand the importance of fast shipping and having a wide range of stock available. That's why we pride ourselves on our efficient shipping process and our significant inventory. We want to ensure that our customers have access to the springs they need as quickly as possible. Additionally, all of our products, including the 621CS, are proudly made in the United States. You can trust Century Spring for reliable, high-quality springs that meet your specific requirements.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku 621CS
C) Part Type Standard
D) Material High Carbon Steel
E) Wire Diameter 0.207 in
F) Outside Diameter 2 in
G) Length 8 in
H) End Type Machine Hook
I) End Position Random
J) Rate 18 lbs/in
K) Initial Tension 22 lb
L) Sugg Max Deflection 5.4 in
L) Sugg Max Load 120 lbf
O) Finish Zinc
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku 621CS
C) Part Type Standard
D) Material High Carbon Steel
E) Wire Diameter 5.26 mm
F) Outside Diameter 50.8 mm
G) Length 203.2 mm
H) End Type Machine Hook
I) End Position Random
J) Rate 3.15 N/mm
K) Initial Tension 9.98 kg
L) Sugg Max Deflection 137.16 mm
L) Sugg Max Load 533.76 N
O) Finish Zinc