Product Overview
0.188 Inch OD 0.75 Inch Free Length 302/304 Stainless Steel Compression Spring
Condition
New old stock. Unused mechanical hardware in clean condition with square, ground ends.
Same or next business day shipping from our Idaho warehouse. Reliable parts since 1999. Honest pricing, no nonsense.
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Product Overview
Century Spring NN-89CS is a straight helical compression spring wound from corrosion-resistant 302/304 stainless steel. Designed for precision return mechanisms, switch actuators, prototypes, and light industrial equipment requiring consistent force in a compact 0.188-inch diameter footprint.
Key Features
- Straight helical compression design with closed and ground ends for stable, square seating
- 302/304 stainless steel wire construction for corrosion resistance and repeatable spring rate
- 0.188 inch (4.78 mm) outer diameter with 0.128 inch (3.25 mm) inner diameter
- 0.75 inch (19.05 mm) nominal free length with 0.030 inch (0.76 mm) wire diameter
- 15.5 total coils delivering a nominal spring rate of 20.0 lbs/in (3.50 N/mm)
- Suggested maximum load capacity of 5.2 lbf (23.13 N) at 0.26 inch (6.60 mm) deflection
Applications
- Rebuilding precision actuators, valves, and release mechanisms on industrial machinery
- Prototyping mechanical assemblies, custom fixtures, and robotics linkages
- Maker projects, switch return biasing, and specialized workshop tooling repairs
Frequently Asked Questions
What are the end configurations on this spring?
The ends are closed and ground flat to sit square against mating surfaces without tilting under axial compression.
What material is the NN-89CS made from?
It is wound from 302/304 stainless steel wire, offering solid corrosion resistance for damp or washdown environments.
Why buy a single Century Spring NN-89CS here instead of a bulk pack?
You get the exact manufacturer part number you need without committing to minimum factory lot sizes or distributor packaging fees. Shipping is an $8 flat rate, free once your order passes $28, and orders leave our Idaho warehouse the same or next business day.
Clean stainless hardware with true ground ends that seat square on the first try. Drop it into your assembly and let the mechanism do the rest.
