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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 wrong-material spring. Engineers, makers, and repair technicians who need a dependable, dimensionally consistent compression spring will find this range covers the most common small-diameter applications without compromise.
Each spring is wound from A2 (304) stainless steel wire with a diameter of 0.8 mm (0.031 in). The outer diameter spans 10–14 mm (0.39–0.55 in) and free lengths run from 10 mm to 305 mm (0.39–12.0 in), giving you a broad selection of spring rates and travel distances within a single consistent wire gauge. Ends are closed and ground for flat, stable seating.
Typical applications include electronic enclosure latches and push-button return mechanisms, small pneumatic valve assemblies requiring corrosion-resistant return springs, and precision jig fixtures where repeatable spring force is critical for consistent clamping or indexing.
| Wire Diameter | 0.8 mm (0.031 in) |
|---|---|
| Outer Diameter Range | 10–14 mm (0.39–0.55 in) |
| Free Length Range | 10–305 mm (0.39–12.0 in) |
| Material | A2 Stainless Steel (304) |
| End Type | Closed and Ground |
| Spring Direction | Right-hand wound (standard) |
| Surface Finish | Bright / natural stainless |
| Corrosion Resistance | Suitable for indoor and light outdoor use |
| Spring Rate | See variant options |
| Max Load | See variant options |
| Pack Size Options | 1 / 5 / 10 / 20 / 50 / 100 pcs |
Measure the bore or guide rod your spring will seat in. The spring outer diameter should be 0.5–1 mm smaller than the bore (for guided compression) or larger than the guide rod (for rod-guided use). Free length should exceed your required working length by at least the compressed travel you need. When in doubt, order a small pack to test fit before committing to a larger quantity.
Load capacity depends on the specific outer diameter and free length of the variant you select. Shorter springs with smaller OD generally have higher spring rates (stiffer), while longer springs with larger OD tend to be softer. For exact spring rate and maximum load data for a specific variant, contact us to confirm before ordering for load-critical applications.
A2 (304) stainless steel offers good resistance to atmospheric corrosion, fresh water, and mild chemical exposure. It is not recommended for prolonged immersion in salt water or exposure to strong chlorides. For marine or highly corrosive environments, consider A4 (316) stainless alternatives. For typical indoor mechanisms, electronics, and light outdoor use, A2 performs reliably without additional coating.
Yes. The closed and ground ends provide flat, stable contact surfaces compatible with standard spring seats, counterbores, and plunger assemblies. Verify that your seat diameter matches the selected OD variant. The 10–14 mm OD range aligns with many common metric spring seat standards used in industrial and hobby applications.
A2 stainless steel is non-magnetic (austenitic), making these springs suitable for use near sensitive electronics where magnetic interference is a concern. The bright stainless finish also avoids the zinc or cadmium coatings found on carbon steel springs that can cause contamination issues in clean assemblies. Confirm dimensional fit with your PCB or enclosure design before ordering.
Pack sizes range from 1 piece (for prototyping or single repairs) up to 100 pieces (for production or stocking). Larger packs offer a lower per-unit cost. If you are unsure which variant fits your application, order a pack of 1 or 5 to test before purchasing a larger quantity. All packs contain identical springs of the selected Wire Dia × OD × Length combination.
Measure three dimensions on the original spring: (1) wire diameter using calipers, (2) outer diameter across the coils, and (3) free length (uncompressed). Match these to the variant options in the selector above. If your original spring is slightly fatigued, its free length may be shorter than the nominal — use the housing or design drawing length as your reference where possible.
