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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

ZZ4-66CS - 1.75 Inch Spring Steel Extension Springs

Inventory:           
Estimated Lead Time

The ZZ4-66CS is a regular extension spring manufactured by Century Spring. It is made from spring steel and has a zinc finish. This spring has a wire diameter of 0.0625 inches, an outer diameter of 0.437 inches, and a free length of 1.75 inches. It has an initial tension of 4 Pound and a maximum deflection of 0.65 inches. The ZZ4-66CS has a spring rate of 23 lbs/inch and can withstand a maximum load of 19 Pound Force. It features machine hooks on both ends. This regular extension spring is suitable for a variety of applications.

At Century Spring, we pride ourselves on our fast shipping and extensive stock inventory. We understand the importance of timely delivery for our customers' projects. Our products, including the ZZ4-66CS, are proudly manufactured in the United States. With our reliable shipping services and abundant supply, Century Spring ensures that customers can quickly receive the high-quality springs they need to get their jobs done efficiently.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku ZZ4-66CS
C) Part Type Standard
D) Material Spring Steel
E) Wire Diameter 0.0625 in
F) Outside Diameter 0.437 in
G) Length 1.75 in
H) End Type Machine Hook
I) End Position Random
J) Rate 23 lbs/in
K) Initial Tension 4 lb
L) Sugg Max Deflection 0.65 in
L) Sugg Max Load 19 lbf
O) Finish Zinc
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku ZZ4-66CS
C) Part Type Standard
D) Material Spring Steel
E) Wire Diameter 1.59 mm
F) Outside Diameter 11.1 mm
G) Length 44.45 mm
H) End Type Machine Hook
I) End Position Random
J) Rate 4.03 N/mm
K) Initial Tension 1.81 kg
L) Sugg Max Deflection 16.51 mm
L) Sugg Max Load 84.51 N
O) Finish Zinc