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257-BCS - 1.88 Inch Music Wire Extension Springs

The 257-BCS is a regular extension spring manufactured by Century Spring. It is made from high-quality Music Wire and features a durable zinc finish. This spring has a wire diameter of 0.015 Inch and an outer diameter of 0.156 inches. With a free length of 1.88 inches, it provides a maximum deflection of 4.4 inches. The 257-BCS has an initial tension of 0.1 Pound and can handle a maximum load of 1.1 Pound Force. It is a left-wound spring with full loop ends. This standard extension spring is suitable for a variety of applications.

At Century Spring, we pride ourselves on our fast shipping and extensive stock inventory. We understand the importance of timely delivery, which is why we strive to get your springs to you as quickly as possible. With our significant stock, including the 257-BCS, you can trust that we have the springs you need readily available. Additionally, all our springs are proudly made in the United States, ensuring superior quality and craftsmanship. Trust Century Spring for reliable shipping and a wide selection of springs for your projects.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Full Loop
Finish Zinc
Initial Tension 0.1 lb
Length 1.88 in
Material Music Wire
Outside Diameter 0.156 in
Part Type Standard
Rate 0.23 lbs/in
SKU 257-BCS
Sugg Max Deflection 4.4 in
Sugg Max Load 1.1 lbf
Wind Direction Left
Wire Diameter 0.015 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Full Loop
Finish Zinc
Initial Tension 0.05 kg
Length 47.75 mm
Material Music Wire
Outside Diameter 3.96 mm
Part Type Standard
Rate 0.04 N/mm
SKU 257-BCS
Sugg Max Deflection 111.76 mm
Sugg Max Load 4.89 N
Wind Direction Left
Wire Diameter 0.38 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $2.01
50 - 149 $1.91
150 - 299 $1.81
300 - 499 $1.71
500 - 749 $1.51
750 - 999 $1.31
1000+ Call for price