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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

O-9CS - 3 Inch Music Wire Extension Springs

Inventory:           
Estimated Lead Time

The O-9CS is a regular extension spring manufactured by Century Spring. It is made from high-quality music wire and has a natural finish. This spring has a wire diameter of 0.029 inches, an outside diameter of 0.188 inches, and a free length of 3 inches. It has an initial tension of 1 pound and a maximum deflection of 2.1 inches. The O-9CS has a spring rate of 2.6 lbs/inch and can withstand a maximum load of 6.6 pound force. It features full loops on both ends, providing secure attachment points. The O-9CS is a reliable extension spring suitable for a wide range of applications.

At Century Spring, we pride ourselves on our fast shipping and extensive stock inventory. We understand the importance of timely delivery, which is why we strive to ship our products promptly. Additionally, we maintain a significant stock of springs, including the O-9CS, to ensure that our customers have access to the springs they need when they need them. What sets us apart is that all of our springs are proudly made in the United States, guaranteeing exceptional quality and craftsmanship. Trust Century Spring for your spring needs and experience our reliable shipping and superior products.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku O-9CS
C) Part Type Standard
D) Material Music Wire
E) Wire Diameter 0.029 in
F) Outside Diameter 0.188 in
G) Length 3 in
H) End Type Full Loop
I) End Position Random
J) Rate 2.6 lbs/in
K) Initial Tension 1 lb
L) Sugg Max Deflection 2.1 in
L) Sugg Max Load 6.6 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku O-9CS
C) Part Type Standard
D) Material Music Wire
E) Wire Diameter 0.74 mm
F) Outside Diameter 4.78 mm
G) Length 76.2 mm
H) End Type Full Loop
I) End Position Random
J) Rate 0.46 N/mm
K) Initial Tension 0.45 kg
L) Sugg Max Deflection 53.34 mm
L) Sugg Max Load 29.36 N
O) Finish None