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Engineers, makers, and repair technicians who need a reliable small-diameter compression spring often struggle to find consistent wire gauge and free-length accuracy in a single source. These 1.5mm wire dia compression springs are designed for applications where dimensional precision and corrosion resistance are non-negotiable — from electronics enclosures and instrument panels to outdoor mechanical assemblies.
Each spring is formed from A2 (304) stainless steel wire with a nominal wire diameter of 1.5mm (0.059 in). The outer diameter spans 10–15mm (0.39–0.59 in) and the free length ranges from 10–200mm (0.39–7.87 in) across the available variants. Ends are closed and ground for flat seating and consistent load distribution.
Typical use cases include compression spring replacement in small appliances and power tools, return-force mechanisms in 3D printer extruder assemblies, and preload springs in precision jigs and fixtures requiring a compact stainless compression spring with defined spring rate.
| Wire Diameter | 1.5mm (0.059 in) |
|---|---|
| Outer Diameter Range | 10–15mm (0.39–0.59 in) |
| Free Length Range | 10–200mm (0.39–7.87 in) |
| Material | A2 Stainless Steel (Grade 304) |
| End Type | Closed and Ground |
| Wind Direction | See variant options |
| Spring Rate | See variant options |
| Surface Finish | Natural (uncoated stainless) |
| Pack Size Options | 1 pc / 5 pcs / 10 pcs |
| Operating Temperature | Typically –20°C to +200°C (–4°F to +392°F) |
Measure the bore or housing your spring will sit in — the outer diameter of the spring should be 0.5–1mm smaller than the bore for a sliding fit. For free length, select a spring that is longer than your required working length so it can be compressed to your target load without reaching solid height. Use the variant selector above to browse available OD and length combinations.
Spring rate depends on the specific wire diameter, outer diameter, free length, and number of active coils. Because this listing covers a wide range of sizes, spring rate varies by variant. If you need a specific spring rate, please contact us with your OD, free length, and load requirements so we can confirm the closest match.
Yes. A2 (Grade 304) stainless steel provides solid resistance to atmospheric corrosion, fresh water, and mild chemical exposure. It is not recommended for prolonged immersion in chloride-rich environments (e.g., seawater or salt spray) — for those conditions, A4 (Grade 316) stainless would be more appropriate.
Closed ends means the last coil is wound tightly against the adjacent coil with no gap, creating a flat bearing surface. Ground ends means that flat surface is machined smooth and perpendicular to the spring axis. Together, these features ensure the spring seats squarely on flat surfaces, reducing lateral deflection and improving load consistency — important for precision assemblies.
Yes. The compact 10–15mm outer diameter and 1.5mm wire gauge make these springs well-suited for extruder return mechanisms, servo preload, button return, and similar light-duty automation tasks. Verify the free length and OD against your specific component geometry before ordering.
All pack sizes contain the same spring — the difference is quantity per order. The 1-piece option is ideal for prototyping or single repairs. The 5-piece and 10-piece packs offer a lower per-unit cost and are suited for small production runs, maintenance kits, or keeping spares on hand. Select your preferred pack size using the Pack Size(Pcs) option above.
Buckling risk increases when the free length-to-outer-diameter ratio exceeds approximately 4:1. For springs in this range with longer free lengths (e.g., 150–200mm at 10mm OD), consider using a guide rod or sleeve to constrain lateral movement. For shorter lengths relative to OD, buckling is generally not a concern under normal compression loads.
