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72921CS - 4.5" Music Wire Compression Spring

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Compression spring manufactured from music wire with 11 coils and closed & ground ends. This spring features an O.D. of 1.687", and an I.D. of 1.251".

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Unit System
Specs (in standard)
Label Value
Brand Century Spring
Display Name 72921
Ends Closed & Ground
Finish None
Free Length 4.5 in
Inside Diameter 1.251 in
Material Music Wire
Outside Diameter 1.687 in
Part Type Standard
Rate 114 lbs/in
SKU 72921CS
Solid Length 2.4 in
Suggested Max Deflection 2.1 in
Suggested Max Load 240 lbf
Total Coils 11
Wire Diameter 0.218 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 72921
Ends Closed & Ground
Finish None
Free Length 114.3 mm
Inside Diameter 31.78 mm
Material Music Wire
Outside Diameter 42.85 mm
Part Type Standard
Rate 19.96 N/mm
SKU 72921CS
Solid Length 60.96 mm
Suggested Max Deflection 53.34 mm
Suggested Max Load 1067.52 N
Total Coils 11
Wire Diameter 5.54 mm
The 72921CS compression spring is a meticulously engineered component designed for a wide range of industrial applications requiring reliable performance and durability. Crafted from premium 0.218" diameter music wire, the 72921 spring design exhibits reliable strength across its 11 active coils, withstanding repeated compression cycles with a maximum load of 240 lbf without succumbing to fatigue.

We manufacture the 72921 design to provide a compression spring that is 4.5" long at rest and provides a consistent rate of 114 lbs/in along its recommended maximum of 2.1" deflection. For best results, your application should fully accommodate the inner (1.251") and outer (1.687") diameters of this spring and be designed for its closed & ground end configuration.

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