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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

S-604CS - 4.25 Inch 302/304 Stainless Steel Extension Springs

Inventory:           
Estimated Lead Time

The S-604CS is a regular extension spring manufactured by Century Spring. It is made from 302/304 stainless steel and has a left wind direction. This spring has a wire diameter of 0.091 inches, an outside diameter of 0.75 inches, and a free length of 4.25 inches. It has an initial tension of 6 pounds and a maximum deflection of 2.9 inches. The S-604CS has a spring rate of 8.1 lbs/inch and can withstand a maximum load of 29 pound force. It features machine hook ends and is suitable for various applications.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. Our springs, including the S-604CS, are made in the United States. With our reliable shipping and ample supply, Century Spring ensures that customers can quickly receive the springs they need for their projects.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku S-604CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.091 in
F) Outside Diameter 0.75 in
G) Length 4.25 in
H) End Type Machine Hook
I) End Position Random
J) Rate 8.1 lbs/in
K) Initial Tension 7.2 lb
L) Sugg Max Deflection 2.9 in
L) Sugg Max Load 29 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku S-604CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 2.31 mm
F) Outside Diameter 19.05 mm
G) Length 107.95 mm
H) End Type Machine Hook
I) End Position Random
J) Rate 1.42 N/mm
K) Initial Tension 3.27 kg
L) Sugg Max Deflection 73.66 mm
L) Sugg Max Load 128.99 N
O) Finish None