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12521CS - 1.41 Inch 302/304 Stainless Steel Extension Springs

The 12521CS 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 0.045 inches, an outside diameter of 0.375 inches, and a free length of 1.41 inches. It has an initial tension of 1 pound and a maximum deflection of 1 inches. The 12521CS has a spring rate of 6.8 inches per pound and a maximum load of 8.3 pound force. It features machine hook ends and is suitable for various extension spring applications.

At Century Spring, we take pride in our fast shipping and extensive stock inventory. Our products, including the 12521CS, are proudly made in the United States. With our efficient shipping processes and ample supply, Century Spring ensures that customers can quickly receive the high-quality springs they need for their projects.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish None
Initial Tension 1 lb
Length 1.41 in
Material 302/304 Stainless Steel
Outside Diameter 0.375 in
Part Type Standard
Rate 6.8 lbs/in
SKU 12521CS
Sugg Max Deflection 1 in
Sugg Max Load 8.3 lbf
Wind Direction Left
Wire Diameter 0.045 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish None
Initial Tension 0.45 kg
Length 35.81 mm
Material 302/304 Stainless Steel
Outside Diameter 9.53 mm
Part Type Standard
Rate 1.19 N/mm
SKU 12521CS
Sugg Max Deflection 25.4 mm
Sugg Max Load 36.92 N
Wind Direction Left
Wire Diameter 1.14 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours

Pricing reflects the base un-configured part price. Final per piece price including configured options will be calculated once a quantity is entered in the field above.

Quantity Price
1 - 49 $2.74
50 - 149 $2.61
150 - 299 $2.47
300 - 499 $2.33
500 - 749 $2.06
750 - 999 $1.79
1000+ Call for price