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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-509CS - 1.31 Inch 302/304 Stainless Steel Extension Springs

Inventory:           
Estimated Lead Time

The S-509CS is a regular extension spring manufactured by Century Spring. It is made from 302/304 Stainless Steel and has a wire diameter of 0.017 inches. This spring has a free length of 1.31 Inch and a maximum deflection of 0.88 inches. It has an initial tension of 0.3 Pound and a maximum load of 1.5 Pound Force. The S-509CS is a left wind spring with full loop ends. With its reliable performance and high-quality construction, this regular extension spring is suitable for a variety of applications.

At Century Spring, we take pride in providing fast shipping and maintaining a significant stock inventory. Our products, including the S-509CS, are proudly made in the United States. With our efficient shipping process and ample supply, we ensure that our customers can quickly receive the springs they need for their projects. Trust Century Spring for all your spring needs.

Download CAD
Unit System
Specs (in standard)
Label Value
A) Brand Century Spring
B) Sku S-509CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.017 in
F) Outside Diameter 0.125 in
G) Length 1.31 in
H) End Type Full Loop
I) End Position Random
J) Rate 1.4 lbs/in
K) Initial Tension 0.3 lb
L) Sugg Max Deflection 0.88 in
L) Sugg Max Load 1.5 lbf
O) Finish None
Specs (in metric)
Label Value
A) Brand Century Spring
B) Sku S-509CS
C) Part Type Standard
D) Material 302/304 Stainless Steel
E) Wire Diameter 0.43 mm
F) Outside Diameter 3.18 mm
G) Length 33.27 mm
H) End Type Full Loop
I) End Position Random
J) Rate 0.25 N/mm
K) Initial Tension 0.14 kg
L) Sugg Max Deflection 22.35 mm
L) Sugg Max Load 6.67 N
O) Finish None