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B18-137CS - 1.16 Inch Spring Steel Extension Springs

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The B18-137CS is a regular extension spring manufactured by Century Spring. It is made from spring steel and has a zinc finish. This spring has a wire diameter of 0.04 inches, an outside diameter of 0.406 inches, and a free length of 1.16 inches. It has an initial tension of 0.8 pound and a maximum deflection of 1.1 inches. The B18-137CS has a spring rate of 4.2 lbs/inch and a maximum load of 5.5 pound force. It features machine hooks on both ends. This extension spring is ideal for various applications that require controlled extension and reliable performance.

At Century Spring, we pride ourselves on our fast shipping and extensive stock inventory. We understand the importance of timely delivery and strive to ensure that our customers receive their springs promptly. Additionally, all our products, including the B18-137CS, are proudly made in the United States. With our commitment to quality and efficiency, you can trust Century Spring to provide the springs you need for your projects.

Download CAD
Unit System
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.8 lb
Length 1.16 in
Material Spring Steel
Outside Diameter 0.406 in
Part Type Standard
Rate 4.2 lbs/in
SKU B18-137CS
Sugg Max Deflection 1.1 in
Sugg Max Load 5.5 lbf
Wire Diameter 0.04 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.36 kg
Length 29.46 mm
Material Spring Steel
Outside Diameter 10.31 mm
Part Type Standard
Rate 0.74 N/mm
SKU B18-137CS
Sugg Max Deflection 27.94 mm
Sugg Max Load 24.46 N
Wire Diameter 1.02 mm