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3221 - 0.69 Inch, 51 Inch Pounds Spring Steel Compression Spring

Inventory Status
In-stock
Estimated Lead Time
In-stock parts: usually ships in 12-24 hours

Regular compression spring in Spring Steel with 4 total coils and Closed & Ground ends. This spring features an O.D. of 0.64 Inch, an I.D. of 0.518 Inch, and a spring rate of 51 Inch Pounds.

NOTE: The spring rate value for compression springs with 4 coils or less is a reference value.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Display Name 3221
Ends Closed & Ground
Finish Gold Iridite
Free Length 0.69 in
Inside Diameter 0.518 in
Material Spring Steel
Outside Diameter 0.64 in
Part Type Standard
Rate 51 lbs/in
SKU 3221CS
Solid Length 0.24 in
Suggested Max Deflection 0.25 in
Suggested Max Load 13 lbf
Total Coils 4
Wire Diameter 0.061 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name 3221
Ends Closed & Ground
Finish Gold Iridite
Free Length 17.53 mm
Inside Diameter 13.16 mm
Material Spring Steel
Outside Diameter 16.26 mm
Part Type Standard
Rate 8.93 N/mm
SKU 3221CS
Solid Length 6.1 mm
Suggested Max Deflection 6.35 mm
Suggested Max Load 57.82 N
Total Coils 4
Wire Diameter 1.55 mm

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