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When a project demands a spring that holds its shape under repeated load cycles without corroding, most off-the-shelf options fall short. Engineers, hobbyists, and repair technicians who work with precision mechanisms need a compression spring they can spec with confidence — one that won't rust, fatigue prematurely, or vary unpredictably between batches. These stainless steel compression springs are built for exactly that scenario.
Each spring is formed from 1.2mm stainless steel wire, wound into a closed-coil cylindrical body. Outer diameters span 8–20mm (approx. 0.31–0.79 in) and free lengths range from 10–50mm (approx. 0.39–1.97 in), giving you a broad selection matrix to match your exact spatial envelope. Springs are available in packs of 10 or 20 pieces so you can stock the quantity that suits your workflow.
Typical applications include electronic enclosure latches and push-button return mechanisms, small appliance and tool assembly where corrosion resistance is critical, RC model and robotics builds requiring consistent spring rates, and DIY furniture hardware or drawer slide tensioning systems.
| Material | Stainless Steel |
|---|---|
| Wire Diameter | 1.2mm |
| Outer Diameter Range | 8–20mm (0.31–0.79 in) |
| Free Length Range | 10–50mm (0.39–1.97 in) |
| Coil Type | Closed ends |
| Spring Type | Compression |
| Pack Quantity | 10 PCS or 20 PCS (see variant options) |
| Finish | Natural stainless (uncoated) |
| Spring Rate | See variant options |
| Inner Diameter | See variant options |
Measure the bore or pocket that will house the spring. The outer diameter of the spring should be slightly smaller than the bore diameter to allow free movement without binding. The free length should be longer than your required compressed length — typically 1.2–1.5× the working length is a good starting point. Use the variant selector to match OD and free length to your housing dimensions.
Spring rate depends on the specific combination of wire diameter, outer diameter, free length, and number of active coils. Because this product covers a wide size matrix, spring rate varies by variant. If you need a precise spring rate for an engineering application, contact us to confirm — or use standard spring rate formulas with the dimensional specs of your chosen variant.
Yes. Stainless steel offers good corrosion resistance in humid, wet, and mildly corrosive environments. These springs are suitable for outdoor enclosures, marine-adjacent applications, and food-adjacent equipment where rust from carbon steel would be a concern. For highly aggressive chemical environments, verify compatibility with your specific media before use.
Yes. The smaller OD variants (8–10mm) and shorter lengths (10–20mm) are commonly used in battery contacts, push-button switches, connector pins, and PCB-mounted spring plungers. The stainless material is non-magnetic in most grades, which is beneficial in sensitive electronic environments.
Both pack sizes contain identical springs — the only difference is quantity. The 10 PCS pack suits single-project or prototype use, while the 20 PCS pack offers better per-unit value for production runs, workshop stock, or applications where you need spares on hand. Select your preferred quantity in the variant selector alongside your OD and length choice.
Inner diameter is approximately equal to the outer diameter minus twice the wire diameter. For a 1.2mm wire, subtract approximately 2.4mm from the outer diameter to estimate ID. For example, an 8mm OD spring has an approximate ID of 5.6mm. If your application requires a precise ID fit over a guide rod, contact us to confirm the exact ID for your chosen variant before ordering.
These are general-purpose stainless steel compression springs intended for mechanical and DIY applications. If your project requires specific material certifications (e.g., RoHS, REACH, or material test reports), please contact us before purchasing so we can confirm the applicable documentation for your order.
