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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-644CS - 1.50 Inch 302/304 Stainless Steel Extension Springs

Inventory:           
Estimated Lead Time

The S-644CS 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 0.072 inches, an outside diameter of 0.375 inches, and a free length of 1.5 inches. It has an initial tension of 11 pounds and a maximum deflection of 0.2 inches. The S-644CS has a maximum load of 34 pound force and a spring rate of 115 lbs/inch. It features extended hook ends and is suitable for various extension spring applications.

At Century Spring, we pride ourselves on our fast shipping and extensive stock inventory. Our springs, including the S-644CS, are proudly made in the United States. With our efficient shipping process and ample supply, Century Spring ensures that customers can quickly receive the high-quality springs they need for their projects.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku S-644CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.072 in
F) Outside Diameter 0.375 in
G) Length 1.5 in
H) End Type Extended Hook
I) End Position Random
J) Rate 115 lbs/in
K) Initial Tension 11 lb
L) Sugg Max Deflection 0.2 in
L) Sugg Max Load 34 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku S-644CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 1.83 mm
F) Outside Diameter 9.53 mm
G) Length 38.1 mm
H) End Type Extended Hook
I) End Position Random
J) Rate 20.14 N/mm
K) Initial Tension 4.99 kg
L) Sugg Max Deflection 5.08 mm
L) Sugg Max Load 151.23 N
O) Finish None