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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

M-138CS - 0.78 Inch Music Wire Extension Springs

Inventory:           
Estimated Lead Time

The M-138CS is a regular extension spring manufactured by Century Spring. This spring is made from high-quality music wire and has a natural finish. It has a wire diameter of 0.022 Inch and an outside diameter of 0.234 inches. The free length of the M-138CS is 0.78 inches, and it has an initial tension of 0.2 Pound. With a maximum deflection of 1.1 Inch and a maximum load of 2.4 Pound Force, this spring is suitable for a variety of applications. Its left-hand wind direction and full loop ends make it easy to install. Century Spring is proud to offer this standard extension spring for your needs.

Century Spring understands the importance of quick delivery and having a wide range of products in stock. We strive to provide fast shipping for all our products, including the M-138CS. Additionally, we maintain a significant inventory of springs to ensure that our customers can find what they need when they need it. We take pride in manufacturing our springs in the United States, ensuring high-quality craftsmanship and supporting local businesses. Trust Century Spring for reliable shipping, extensive stock, and top-notch American-made springs.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku M-138CS
C) Part Type Standard
D) Material Music Wire
E) Wire Diameter 0.022 in
F) Outside Diameter 0.234 in
G) Length 0.78 in
H) End Type Full Loop
I) End Position Random
J) Rate 2 lbs/in
K) Initial Tension 0.2 lb
L) Sugg Max Deflection 1.1 in
L) Sugg Max Load 2.4 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku M-138CS
C) Part Type Standard
D) Material Music Wire
E) Wire Diameter 0.56 mm
F) Outside Diameter 5.94 mm
G) Length 19.81 mm
H) End Type Full Loop
I) End Position Random
J) Rate 0.35 N/mm
K) Initial Tension 0.09 kg
L) Sugg Max Deflection 27.94 mm
L) Sugg Max Load 10.68 N
O) Finish None