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647CS - 5.38 Inch High Carbon Steel Extension Springs

The 647CS is a regular extension spring manufactured by Century Spring. It is made from High Carbon steel and has a black oxide finish. This spring has a wire diameter of 0.283 Inch and an outer diameter of 1.375 inches. It has a free length of 5.38 Inch and an initial tension of 100 Pound. The 647CS has a maximum deflection of 0.55 Inch and a maximum load of 512 Pound Force. It features machine hook ends and a left wind direction. This extension spring is suitable for various applications and is available for purchase.

At Century Spring, we pride ourselves on fast shipping and maintaining a significant stock inventory. We understand the importance of timely delivery and ensuring that our customers have access to the springs they need when they need them. Our products, including the 647CS, are proudly made in the United States. With our reliable shipping and ample supply, Century Spring is your go-to source for high-quality springs.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Black Oxide
Initial Tension 100 lb
Length 5.38 in
Material High Carbon Steel
Outside Diameter 1.375 in
Part Type Standard
Rate 545 lbs/in
SKU 647CS
Sugg Max Deflection 0.55 in
Sugg Max Load 512 lbf
Wind Direction Left
Wire Diameter 0.283 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish Black Oxide
Initial Tension 45.35 kg
Length 136.65 mm
Material High Carbon Steel
Outside Diameter 34.93 mm
Part Type Standard
Rate 95.43 N/mm
SKU 647CS
Sugg Max Deflection 13.97 mm
Sugg Max Load 2277.38 N
Wind Direction Left
Wire Diameter 7.19 mm
Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours
Quantity Price
1 - 49 $24.52
50 - 149 $23.30
150 - 299 $22.07
300 - 499 $20.85
500 - 749 $18.39
750 - 999 $15.94
1000+ Call for price