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ZZ4-29CS - 2.25 Inch Music Wire Extension Springs

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The ZZ4-29CS is an Extension Spring from Century Spring. It features a machine hook on both ends and is finished with zinc for durability. With a free length of 2.25 inches, this spring is made from high-quality music wire. It has an initial tension of 0.4 pounds and a maximum deflection of 4.4 inches. The ZZ4-29CS can handle a maximum load of 3.9 pounds of force. Measuring 0.281 inches in outside diameter and 0.028 inches in wire diameter, this spring has a spring rate of 0.79 inch-pounds. It is designed to wind left and weighs just 0.0104 pounds.

When you choose Century Spring, you can expect fast shipping and access to a wide inventory of springs. We take pride in producing our springs in the United States, ensuring quality and supporting local manufacturing. Whether you need the ZZ4-29CS or any other spring, Century Spring has you covered. Trust us to deliver the springs you need for your projects in a timely manner.

Download CAD
Unit System
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.4 lb
Length 2.25 in
Material Music Wire
Outside Diameter 0.281 in
Part Type Standard
Rate 0.79 lbs/in
SKU ZZ4-29CS
Sugg Max Deflection 4.4 in
Sugg Max Load 3.9 lbf
Wire Diameter 0.028 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.18 kg
Length 57.15 mm
Material Music Wire
Outside Diameter 7.14 mm
Part Type Standard
Rate 0.14 N/mm
SKU ZZ4-29CS
Sugg Max Deflection 111.76 mm
Sugg Max Load 17.35 N
Wire Diameter 0.71 mm