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B7-57CS - 4.97 Inch Spring Steel Extension Springs

Inventory Status
Estimated Lead Time

The B7-57CS is an extension spring manufactured by Century Spring. This regular extension spring is made of spring steel and has a full loop at each end. It has a free length of 4.97 inches and an initial tension of 1 pound. With a maximum deflection of 9.1 inches and a maximum load of 11 pound force, this spring provides reliable performance. Its outer diameter is 0.75 inches, and the wire diameter measures 0.0625 inches. The spring rate is 1.1 lbs/inch. Century Spring's B7-57CS is a high-quality 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 and ensure that our customers receive their orders promptly. Our springs, including the B7-57CS, are proudly made in the United States, reflecting our commitment to quality and craftsmanship. Whether you need a single spring or a bulk order, Century Spring is here to meet your needs and provide reliable, American-made products.

Download CAD
Unit System
Specs (in standard)
Label Value
Brand Century Spring
Ends Full Loop
Finish None
Initial Tension 1 lb
Length 4.97 in
Material Spring Steel
Outside Diameter 0.75 in
Part Type Standard
Rate 1.1 lbs/in
SKU B7-57CS
Sugg Max Deflection 9.1 in
Sugg Max Load 11 lbf
Wind Direction Left
Wire Diameter 0.0625 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Full Loop
Finish None
Initial Tension 0.45 kg
Length 126.24 mm
Material Spring Steel
Outside Diameter 19.05 mm
Part Type Standard
Rate 0.19 N/mm
SKU B7-57CS
Sugg Max Deflection 231.14 mm
Sugg Max Load 48.93 N
Wind Direction Left
Wire Diameter 1.59 mm