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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

B5-40CS - 2.59 Inch Spring Steel Extension Springs

Inventory:           
Estimated Lead Time

The B5-40CS is a regular extension spring manufactured by Century Spring. It is made from spring steel and has a natural finish. This spring has a wire diameter of 0.045 inches, an outside diameter of 0.359 inches, and a free length of 2.59 inches. It has an initial tension of 2 Pound and a maximum deflection of 2 inches. The B5-40CS has a spring rate of 3.9 lbs/inch and a maximum load of 9.2 Pound Force. It features a left wind direction and crossover hook ends. This regular extension spring is suitable for a variety of applications.

At Century Spring, we are proud to offer fast shipping and maintain a significant stock inventory. Our products, including the B5-40CS, are proudly made 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 B5-40CS
C) Part Type Standard
D) Material Spring Steel
E) Wire Diameter 0.045 in
F) Outside Diameter 0.359 in
G) Length 2.59 in
H) End Type Crossover Hook
I) End Position Random
J) Rate 3.9 lbs/in
K) Initial Tension 2 lb
L) Sugg Max Deflection 2 in
L) Sugg Max Load 9.2 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku B5-40CS
C) Part Type Standard
D) Material Spring Steel
E) Wire Diameter 1.14 mm
F) Outside Diameter 9.12 mm
G) Length 65.79 mm
H) End Type Crossover Hook
I) End Position Random
J) Rate 0.68 N/mm
K) Initial Tension 0.91 kg
L) Sugg Max Deflection 50.8 mm
L) Sugg Max Load 40.92 N
O) Finish None