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Century Spring

121CS - 8.5 Inch High Carbon Steel Extension Spring

Inventory Status
Estimated Lead Time

Regular extension spring in High Carbon Steel. This spring features an O.D. of 0.437 Inch and an initial tension of 8 Pound.

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 121
Ends Machine Hook
Finish Zinc
Initial Tension 8 lb
Length 8.5 in
Material High Carbon Steel
Outside Diameter 0.437 in
Part Type Standard
Rate 7.3 lbs/in
SKU 121CS
Sugg Max Deflection 2.9 in
Sugg Max Load 29 lbf
Wind Direction Left
Wire Diameter 0.072 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 121
Ends Machine Hook
Finish Zinc
Initial Tension 3.63 kg
Length 215.9 mm
Material High Carbon Steel
Outside Diameter 11.1 mm
Part Type Standard
Rate 1.28 N/mm
SKU 121CS
Sugg Max Deflection 73.66 mm
Sugg Max Load 128.99 N
Wind Direction Left
Wire Diameter 1.83 mm

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