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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

ZZ3-21CS - 1.25 Inch Spring Steel Extension Springs

Inventory:           
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
A) Brand Century Spring
B) Sku ZZ3-21CS
C) Part Type Standard
D) Material Spring Steel
E) Wire Diameter 0.035 in
F) Outside Diameter 0.266 in
G) Length 1.25 in
H) End Type Machine Hook
I) End Position Random
J) Rate 7 lbs/in
K) Initial Tension 1 lb
L) Sugg Max Deflection 0.69 in
L) Sugg Max Load 5.9 lbf
O) Finish Zinc
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku ZZ3-21CS
C) Part Type Standard
D) Material Spring Steel
E) Wire Diameter 0.89 mm
F) Outside Diameter 6.76 mm
G) Length 31.75 mm
H) End Type Machine Hook
I) End Position Random
J) Rate 1.23 N/mm
K) Initial Tension 0.45 kg
L) Sugg Max Deflection 17.53 mm
L) Sugg Max Load 26.24 N
O) Finish Zinc