Compression Springs Regular

S-991CS - 2.63" 302/304 Stainless Steel Compression Spring

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Compression spring manufactured from 302/304 stainless steel with 5 coils and closed & ground ends. This spring features an O.D. of 1.593", and an I.D. of 1.417".

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Standard

Metric

Specs (in standard)
Label	Value
Brand	Century Spring
Display Name	S-991
Ends	Closed & Ground
Finish	None
Free Length	2.63 in
Inside Diameter	1.417 in
Material	302/304 Stainless Steel
Outside Diameter	1.593 in
Part Type	Standard
Rate	7.3 lbs/in
SKU	S-991CS
Solid Length	0.44 in
Suggested Max Deflection	1.9 in
Suggested Max Load	14 lbf
Total Coils	5
Wire Diameter	0.088 in

Specs (in metric)
Label	Value
Brand	Century Spring
Display Name	S-991
Ends	Closed & Ground
Finish	None
Free Length	66.8 mm
Inside Diameter	35.99 mm
Material	302/304 Stainless Steel
Outside Diameter	40.46 mm
Part Type	Standard
Rate	1.28 N/mm
SKU	S-991CS
Solid Length	11.18 mm
Suggested Max Deflection	48.26 mm
Suggested Max Load	62.27 N
Total Coils	5
Wire Diameter	2.24 mm

The S-991 compression spring is engineered for optimal performance in demanding applications. Constructed from high-quality 302/304 stainless steel and designed with precision and durability in mind, this spring is an essential component for a variety of mechanical systems where reliable force and resilience are paramount.

The S-991CS compression spring is designed with a free length of 1.28" total of 5.75 coils, and a rate of 12 lbs/in providing a balanced combination of flexibility and strength. This spring coil, and its closed & ground end configuration allows for efficient energy storage and release, making it suitable for applications requiring precise motion control.

The S-991 spring design is ideal for use in industrial machinery, automotive systems, and various mechanical assemblies where reliable force application is crucial. Its robust construction and thoughtful design make it a dependable choice for engineers seeking a high-performance spring solution.