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I-39 - 1.31 Inch, 21 Inch Pounds Spring Steel Compression Spring

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

Compression spring manufactured from Spring Steel with 12.3 coils and Closed & Ground ends. This spring features an O.D. of 0.406 Inch, an I.D. of 0.304 Inch, and a spring rate of 21 Inch Pounds.

Unit System
View Spec Sheet
Specs (in standard)
Label Value
Brand Century Spring
Display Name I-39
Ends Closed & Ground
Finish Zinc
Free Length 1.31 in
Inside Diameter 0.304 in
Material Spring Steel
Outside Diameter 0.406 in
Part Type Standard
Rate 21 lbs/in
SKU I-39CS
Solid Length 0.62 in
Suggested Max Deflection 0.54 in
Suggested Max Load 12 lbf
Total Coils 12.3
Wire Diameter 0.051 in
Specs (in metric)
Label Value
Brand Century Spring
Display Name I-39
Ends Closed & Ground
Finish Zinc
Free Length 33.27 mm
Inside Diameter 7.72 mm
Material Spring Steel
Outside Diameter 10.31 mm
Part Type Standard
Rate 3.68 N/mm
SKU I-39CS
Solid Length 15.75 mm
Suggested Max Deflection 13.72 mm
Suggested Max Load 53.38 N
Total Coils 12.3
Wire Diameter 1.3 mm

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