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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

ZZ1-21CS - 0.91 Inch 302/304 Stainless Steel Extension Springs

Inventory:           
Estimated Lead Time

The ZZ1-21CS is a regular extension spring manufactured by Century Spring. It is made from 302/304 Stainless Steel and has a natural finish. This spring has a wire diameter of 0.032 inches, an outside diameter of 0.25 inches, and a free length of 0.91 inches. It has an initial tension of 0.8 Pound and a maximum deflection of 0.45 inches. The ZZ1-21CS has a spring rate of 8.4 lbs/inch and a maximum load of 4.7 Pound Force. It features machine hook ends and left wind direction. This regular extension spring is suitable for a wide range of applications.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand the importance of timely delivery and maintaining a large selection of springs for our customers. All our products, including the ZZ1-21CS, are proudly made in the United States. With our efficient shipping process and ample supply, Century Spring ensures that you can quickly receive the springs you need for your projects.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku ZZ1-21CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.032 in
F) Outside Diameter 0.25 in
G) Length 0.91 in
H) End Type Machine Hook
I) End Position Random
J) Rate 8.4 lbs/in
K) Initial Tension 0.8 lb
L) Sugg Max Deflection 0.45 in
L) Sugg Max Load 4.7 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku ZZ1-21CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.81 mm
F) Outside Diameter 6.35 mm
G) Length 23.11 mm
H) End Type Machine Hook
I) End Position Random
J) Rate 1.47 N/mm
K) Initial Tension 0.36 kg
L) Sugg Max Deflection 11.43 mm
L) Sugg Max Load 20.91 N
O) Finish None