This browser is no longer supported. Upgrade to Microsoft Edge or switch to a supported browser, like Chrome, Safari, or Firefox, to explore the MW Components website.

We're sorry for the inconvenience.

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.

190 DAYS

81020CS - 5 Inch Music Wire Extension Springs

Inventory:           
Estimated Lead Time

The 81020CS is a regular extension spring manufactured by Century Spring. It has a free length of 5 inches and a wire diameter of 0.125 inches. With a maximum deflection of 3.3 inches, this spring is capable of handling a maximum load of 73 pound force. The spring rate is 20 lbs/inch, providing the necessary tension for various applications. Made from high-quality music wire, this spring is built to last. The 81020CS features a full loop on both ends, ensuring secure attachment. It has an outside diameter of 1 inch and weighs 0.2817 pounds. This standard extension spring is ideal for a wide range of projects.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand the importance of quick turnaround times and strive to deliver our products promptly. With our significant stock, including the 81020CS, customers can trust that we have the springs they need readily available. Additionally, all of our springs are proudly made in the United States, guaranteeing high-quality craftsmanship. Trust Century Spring for reliable shipping, ample supply, and top-notch springs for your projects.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku 81020CS
C) Part Type Standard
D) Material Music Wire
E) Wire Diameter 0.125 in
F) Outside Diameter 1 in
G) Length 5 in
H) End Type Full Loop
I) End Position Random
J) Rate 20 lbs/in
K) Initial Tension 6 lb
L) Sugg Max Deflection 3.3 in
L) Sugg Max Load 73 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku 81020CS
C) Part Type Standard
D) Material Music Wire
E) Wire Diameter 3.18 mm
F) Outside Diameter 25.4 mm
G) Length 127 mm
H) End Type Full Loop
I) End Position Random
J) Rate 3.5 N/mm
K) Initial Tension 2.72 kg
L) Sugg Max Deflection 83.82 mm
L) Sugg Max Load 324.7 N
O) Finish None