Compression Springs Regular

3987CS - 4" Spring Steel Compression Spring

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Compression spring manufactured from spring steel with 12.3 coils and closed & ground ends. This spring features an O.D. of 1.375", and an I.D. of 1.021".

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Standard

Metric

Specs (in standard)
Label	Value
Brand	Century Spring
Display Name	3987
Ends	Closed & Ground
Finish	Zinc
Free Length	4 in
Inside Diameter	1.021 in
Material	Spring Steel
Outside Diameter	1.375 in
Part Type	Standard
Rate	80 lbs/in
SKU	3987CS
Solid Length	2.17 in
Suggested Max Deflection	1.5 in
Suggested Max Load	119 lbf
Total Coils	12.3
Wire Diameter	0.177 in

Specs (in metric)
Label	Value
Brand	Century Spring
Display Name	3987
Ends	Closed & Ground
Finish	Zinc
Free Length	101.6 mm
Inside Diameter	25.93 mm
Material	Spring Steel
Outside Diameter	34.93 mm
Part Type	Standard
Rate	14.01 N/mm
SKU	3987CS
Solid Length	55.12 mm
Suggested Max Deflection	38.1 mm
Suggested Max Load	529.31 N
Total Coils	12.3
Wire Diameter	4.5 mm

The compression spring 3987CS is an essential component designed for applications requiring reliable force and energy storage. Crafted from high-quality spring steel, the 3987 compression spring design exhibits exceptional tensile strength and resilience.

The 3987 design is manufactured with a free length of 4", with an outer diameter of 1.375", an inner diameter of 1.021", and a total of 12.3 coils, expertly designed to deliver consistent compression characteristics including a rate of 80 lbs/in.

The 3987CS compression spring is ideally suited for use in a wide range of mechanical assemblies, including but not limited to automotive suspension systems, industrial machinery, and electronic devices.

In summary, the compression spring 3987 design stands out for its superior material properties, thoughtful design, and versatility in application. It is a prime choice for engineers committed to excellence and innovation in their projects.