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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

ZZ4-21CS - 1.50 Inch 302/304 Stainless Steel Extension Springs

Inventory:           
Estimated Lead Time

The ZZ4-21CS 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 0.018 inches, an outside diameter of 0.125 inches, and a free length of 1.5 inches. It has an initial tension of 0.3 pound and a maximum deflection of 0.96 inches. The ZZ4-21CS has a spring rate of 1.5 lbs/inch and a maximum load of 1.7 pound force. It features full loop ends and is suitable for various applications.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. We understand the importance of timely delivery and strive to ensure that our customers receive their springs quickly. Additionally, all our products, including the ZZ4-21CS, are proudly made in the United States. With our reliable shipping and ample supply, Century Spring is your trusted partner for all your spring needs.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku ZZ4-21CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.018 in
F) Outside Diameter 0.125 in
G) Length 1.5 in
H) End Type Machine Hook
I) End Position Random
J) Rate 1.5 lbs/in
K) Initial Tension 0.38 lb
L) Sugg Max Deflection 0.96 in
L) Sugg Max Load 1.7 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku ZZ4-21CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.46 mm
F) Outside Diameter 3.18 mm
G) Length 38.1 mm
H) End Type Machine Hook
I) End Position Random
J) Rate 0.26 N/mm
K) Initial Tension 0.17 kg
L) Sugg Max Deflection 24.38 mm
L) Sugg Max Load 7.56 N
O) Finish None