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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-621CS - 3.22 Inch 302/304 Stainless Steel Extension Springs

Inventory:           
Estimated Lead Time

The S-621CS is a regular extension spring manufactured by Century Spring. It is made from 302/304 stainless steel and does not have a finish. This spring has a wire diameter of 0.055 inches, an outside diameter of 0.375 inches, and a free length of 3.22 inches. It has an initial tension of 3 pounds and a maximum deflection of 1.6 inches. The S-621CS has a rate of 7 inch-pounds and can handle a maximum load of 15 pounds. It features machine hook ends and a left wind direction. This extension spring is suitable for various applications.

Century Spring prides itself on fast shipping and a significant stock inventory. We understand the importance of timely delivery for our customers, which is why we strive to process and ship orders quickly. Additionally, our extensive stock ensures that we have the springs you need readily available. We are proud to manufacture our products in the United States, ensuring quality and supporting local industries. Trust Century Spring for efficient shipping, ample supply, and dependable springs for your projects.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku S-621CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.055 in
F) Outside Diameter 0.375 in
G) Length 3.22 in
H) End Type Machine Hook
I) End Position Random
J) Rate 7 lbs/in
K) Initial Tension 3.7 lb
L) Sugg Max Deflection 1.6 in
L) Sugg Max Load 15 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku S-621CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 1.4 mm
F) Outside Diameter 9.53 mm
G) Length 81.79 mm
H) End Type Machine Hook
I) End Position Random
J) Rate 1.23 N/mm
K) Initial Tension 1.68 kg
L) Sugg Max Deflection 40.64 mm
L) Sugg Max Load 66.72 N
O) Finish None