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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

B1-49CS - 1.38 Inch Music Wire Extension Springs

Inventory:           
Estimated Lead Time

The B1-49CS is a regular extension spring manufactured by Century Spring. It features machine hook ends and is made from high-quality music wire material. This spring has a free length of 1.38 inches and a maximum deflection of 2.5 inches. With an initial tension of 0.3 pounds, it can handle a maximum load of 3.7 pound force. The B1-49CS has an outside diameter of 0.359 inches and a wire diameter of 0.03 inches. Its spring rate is 1.2 lbs/inch. This extension spring is suitable for various applications and is available for purchase.

At Century Spring, we pride ourselves in offering fast shipping and maintaining a significant stock inventory. We understand the importance of timely delivery, and our reliable shipping ensures that you receive your springs quickly. With our ample supply, including the B1-49CS, we guarantee that you can find the springs you need for your projects. To top it off, all our springs are proudly made in the United States, ensuring the highest quality and craftsmanship. Choose Century Spring for your spring needs and experience the convenience and reliability we provide.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku B1-49CS
C) Part Type Standard
D) Material Music Wire
E) Wire Diameter 0.03 in
F) Outside Diameter 0.359 in
G) Length 1.38 in
H) End Type Machine Hook
I) End Position Random
J) Rate 1.2 lbs/in
K) Initial Tension 0.3 lb
L) Sugg Max Deflection 2.5 in
L) Sugg Max Load 3.7 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku B1-49CS
C) Part Type Standard
D) Material Music Wire
E) Wire Diameter 0.76 mm
F) Outside Diameter 9.12 mm
G) Length 35.05 mm
H) End Type Machine Hook
I) End Position Random
J) Rate 0.21 N/mm
K) Initial Tension 0.14 kg
L) Sugg Max Deflection 63.5 mm
L) Sugg Max Load 16.46 N
O) Finish None