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B6-21CS - 1.09 Inch Music Wire Extension Springs

Inventory Status
Estimated Lead Time

The B6-21CS is a regular extension spring manufactured by Century Spring. It is made from Music Wire and has no finish applied. This spring has a wire diameter of 0.025 inches, an outer diameter of 0.25 inches, and a free length of 1.09 inches. It has an initial tension of 0.3 Pound and a maximum deflection of 1.9 inches. The B6-21CS has a spring rate of 1.5 lbs/inch and a maximum load of 3.1 Pound Force. It is a left wind spring with machine hook ends. This regular extension spring is suitable for a variety of applications.

Century Spring offers fast shipping and maintains a significant stock inventory. We proudly manufacture our springs in the United States. With our reliable shipping and ample supply, Century Spring ensures that customers can quickly receive the springs they need for their projects.

Unit System
Specs (in standard)
Label Value
Brand Century Spring
Ends Machine Hook
Finish None
Initial Tension 0.3 lb
Length 1.09 in
Material Music Wire
Outside Diameter 0.25 in
Part Type Standard
Rate 1.5 lbs/in
SKU B6-21CS
Sugg Max Deflection 1.9 in
Sugg Max Load 3.1 lbf
Wind Direction Left
Wire Diameter 0.025 in
Specs (in metric)
Label Value
Brand Century Spring
Ends Machine Hook
Finish None
Initial Tension 0.14 kg
Length 27.69 mm
Material Music Wire
Outside Diameter 6.35 mm
Part Type Standard
Rate 0.26 N/mm
SKU B6-21CS
Sugg Max Deflection 48.26 mm
Sugg Max Load 13.79 N
Wind Direction Left
Wire Diameter 0.64 mm