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ZZ3-21CS - 1.25 Inch Spring Steel Extension Springs

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Estimated Lead Time

The ZZ3-21CS is a regular extension spring manufactured by Century Spring. It is made from spring steel with a zinc finish for added durability. This spring has a free length of 1.25 inches and an outside diameter of 0.266 inches. It has an initial tension of 1 pound and a maximum deflection of 0.69 inches. The ZZ3-21CS has a maximum load capacity of 5.9 pound force and a spring rate of 7 lbs/inch. It features machine hooks on both ends and is wound in a left direction.

Century Spring takes pride in offering fast shipping and maintaining a significant stock inventory. We understand the importance of timely delivery and strive to ensure that our customers receive their springs promptly. Additionally, all of our springs, including the ZZ3-21CS, are proudly made in the United States. We believe in producing high-quality products and supporting local manufacturing. With our reliable shipping and ample supply, Century Spring is your trusted source for all your spring needs.

Download CAD
Unit System
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 1 lb
Length 1.25 in
Material Spring Steel
Outside Diameter 0.266 in
Part Type Standard
Rate 7 lbs/in
SKU ZZ3-21CS
Sugg Max Deflection 0.69 in
Sugg Max Load 5.9 lbf
Wire Diameter 0.035 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Zinc
Initial Tension 0.45 kg
Length 31.75 mm
Material Spring Steel
Outside Diameter 6.76 mm
Part Type Standard
Rate 1.23 N/mm
SKU ZZ3-21CS
Sugg Max Deflection 17.53 mm
Sugg Max Load 26.24 N
Wire Diameter 0.89 mm