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When a mechanism fails because a spring loses tension, collapses under load, or corrodes in a damp environment, the root cause is almost always an undersized or low-grade spring. Engineers, repair technicians, and hands-on makers who need a dependable, dimensionally consistent compression spring will find this range covers the widest practical selection of wire diameters and coil sizes in a single listing.
Each spring is wound from stainless steel wire in diameters ranging from 0.2 mm to 2 mm (approximately 0.008 in to 0.079 in). Outer diameters span Ø2 mm to Ø30 mm (approximately Ø0.08 in to Ø1.18 in), and free lengths run from 10 mm to 50 mm (approximately 0.39 in to 1.97 in). Packing quantities of 4, 5, or 10 pieces per pack allow you to order exactly what a job requires.
Typical applications include stainless steel compression springs for electronics enclosures and PCB contacts, small compression springs for valve assemblies and fluid-control mechanisms, and miniature compression springs for precision instruments, jigs, and fixtures where corrosion resistance and consistent spring rate are non-negotiable.
| Material | Stainless Steel |
|---|---|
| Wire Diameter Range | 0.2 mm – 2 mm (0.008 in – 0.079 in) |
| Outer Diameter Range | Ø2 mm – Ø30 mm (Ø0.08 in – Ø1.18 in) |
| Free Length Range | 10 mm – 50 mm (0.39 in – 1.97 in) |
| Spring Type | Compression (helical) |
| End Style | See variant options |
| Spring Rate | See variant options |
| Surface Finish | Natural stainless (no coating) |
| Packing Quantity | 4 pcs / 5 pcs / 10 pcs (varies by size) |
Start by measuring the bore or housing your spring must fit inside — the outer diameter of the spring should be slightly smaller than the bore. Next, determine the load you need the spring to resist and the travel distance (stroke). Thicker wire diameters produce stiffer springs with higher spring rates, while thinner wire diameters give softer, more compliant springs. If you are replacing an existing spring, measure the original's wire diameter, outer diameter, and free length directly with calipers before selecting a replacement.
These springs are designed for general mechanical, electronic, and light-to-moderate-duty applications. Stainless steel provides good fatigue resistance for typical cycling loads. For heavy industrial applications with very high cycle counts or extreme loads, we recommend verifying the spring rate and maximum deflection against your engineering requirements. Contact us to confirm suitability for demanding duty cycles.
Stainless steel offers significantly better corrosion resistance than carbon steel or zinc-plated springs. These springs are suitable for damp indoor environments, light outdoor exposure, and mild chemical contact. For prolonged immersion in saltwater or aggressive chemical environments, please contact us to confirm the specific grade of stainless steel used and its suitability for your conditions.
The size range covers a very broad set of applications: pen and pencil mechanisms, electronics PCB contacts, valve bodies, fluid-control assemblies, tooling jigs and fixtures, appliance components, and general DIY repair projects. Because outer diameters start at just Ø2 mm, even miniature precision instruments can be accommodated. Always verify the outer diameter, free length, and wire diameter match your assembly's specifications before ordering.
Pack quantity varies by spring size — larger or heavier springs are typically available in smaller pack counts (4 or 5 pcs), while smaller springs come in 10-piece packs. Select the size combination you need first; the available pack quantity will be shown for that variant. If you need larger quantities for production or stocking purposes, please contact us to discuss bulk options.
Yes, in most cases. Measure the original spring's wire diameter, outer diameter, and free length with calipers, then select the matching variant from this listing. Because the dimensions follow standard increments, you will typically find a match or a very close substitute. If the original spring has a specific spring rate requirement, contact us with your measurements and load specifications so we can advise on the best match.
Free length is the length of the spring when no load is applied — this is the dimension listed in the variant options (10 mm to 50 mm). Compressed length (solid height) is the length when the spring is fully compressed coil-to-coil. The difference between free length and solid height is the maximum available stroke. For most light-duty applications, you should not compress the spring beyond 80% of its available stroke to preserve fatigue life.
