This browser is no longer supported. Upgrade to Microsoft Edge or switch to a supported browser, like Chrome, Safari, or Firefox, to explore the MW Components website.

We're sorry for the inconvenience.

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

Inventory Status
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
Brand Century Spring
Ends Machine Hook
Finish None
Initial Tension 0.38 lb
Length 1.5 in
Material 302/304 Stainless Steel
Outside Diameter 0.125 in
Part Type Standard
Rate 1.5 lbs/in
SKU ZZ4-21CS
Sugg Max Deflection 0.96 in
Sugg Max Load 1.7 lbf
Wind Direction Left
Wire Diameter 0.018 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish None
Initial Tension 0.17 kg
Length 38.1 mm
Material 302/304 Stainless Steel
Outside Diameter 3.18 mm
Part Type Standard
Rate 0.26 N/mm
SKU ZZ4-21CS
Sugg Max Deflection 24.38 mm
Sugg Max Load 7.56 N
Wind Direction Left
Wire Diameter 0.46 mm