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557CS - 1.38 Inch Phosphor Bronze Extension Springs

The 557CS is a regular extension spring manufactured by Century Spring. It features machine hook ends and is made from phosphor bronze material. This spring has a free length of 1.38 inches and an initial tension of 6 pounds. With a max deflection of 0.43 inches and a max load capacity of 26 pounds, the 557CS is a reliable choice for various applications. Its outside diameter measures 0.328 inches and it has a spring rate of 47 inches per pound. The 557CS is a left-wound spring with a wire diameter of 0.064 inches.

Century Spring takes pride in its fast shipping and extensive stock inventory. We understand the importance of timely delivery and ensuring that our customers have access to the parts they need. All of our springs, including the 557CS, are proudly made in the United States. With our commitment to quality and availability, Century Spring is your trusted source for springs.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish None
Initial Tension 6 lb
Length 1.38 in
Material Phosphor Bronze
Outside Diameter 0.328 in
Part Type Standard
Rate 47 lbs/in
SKU 557CS
Sugg Max Deflection 0.43 in
Sugg Max Load 26 lbf
Wind Direction Left
Wire Diameter 0.064 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish None
Initial Tension 2.72 kg
Length 35.05 mm
Material Phosphor Bronze
Outside Diameter 8.33 mm
Part Type Standard
Rate 8.23 N/mm
SKU 557CS
Sugg Max Deflection 10.92 mm
Sugg Max Load 115.65 N
Wind Direction Left
Wire Diameter 1.63 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $4.45
50 - 149 $4.23
150 - 299 $4.01
300 - 499 $3.79
500 - 749 $3.34
750 - 999 $2.90
1000+ Call for price