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B3-30CS - 1.50 Inch Spring Steel Extension Springs

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The B3-30CS 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 0.055 inches, an outside diameter of 0.375 inches, and a free length of 1.5 inches. It has an initial tension of 4 Pound and a maximum deflection of 0.59 inches. The B3-30CS has a spring rate of 20 lbs/inch and a maximum load of 15 Pound Force. It features machine hooks on both ends. This regular extension spring is suitable for a variety of applications.

At Century Spring, we offer fast shipping and maintain a significant stock inventory. Our products, including the B3-30CS, 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
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 4 lb
Length 1.5 in
Material Spring Steel
Outside Diameter 0.375 in
Part Type Standard
Rate 20 lbs/in
SKU B3-30CS
Sugg Max Deflection 0.59 in
Sugg Max Load 15 lbf
Wire Diameter 0.055 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 1.81 kg
Length 38.1 mm
Material Spring Steel
Outside Diameter 9.53 mm
Part Type Standard
Rate 3.5 N/mm
SKU B3-30CS
Sugg Max Deflection 14.99 mm
Sugg Max Load 66.72 N
Wire Diameter 1.4 mm