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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

B7-57CS - 4.97 Inch Spring Steel Extension Springs

Inventory:           
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
A) Brand Century Spring
B) Sku B7-57CS
C) Part Type Standard
D) Material Spring Steel
E) Wire Diameter 0.0625 in
F) Outside Diameter 0.75 in
G) Length 4.97 in
H) End Type Full Loop
I) End Position Random
J) Rate 1.1 lbs/in
K) Initial Tension 1 lb
L) Sugg Max Deflection 9.1 in
L) Sugg Max Load 11 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku B7-57CS
C) Part Type Standard
D) Material Spring Steel
E) Wire Diameter 1.59 mm
F) Outside Diameter 19.05 mm
G) Length 126.24 mm
H) End Type Full Loop
I) End Position Random
J) Rate 0.19 N/mm
K) Initial Tension 0.45 kg
L) Sugg Max Deflection 231.14 mm
L) Sugg Max Load 48.93 N
O) Finish None