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When a mechanism fails to return to position, or a valve seat leaks under load, the culprit is often an undersized or fatigued compression spring. Engineers, hobbyists, and repair technicians who need a reliable, dimensionally consistent coil spring will find this range covers the most common small-diameter requirements without custom lead times.
Each spring in this series is wound from spring steel wire with a nominal diameter of 1.2 mm (approx. 0.047 in). Outer diameters span 6–28 mm (approx. 0.24–1.10 in) and free lengths range from 60–100 mm (approx. 2.36–3.94 in), giving you a broad selection matrix across a single wire gauge. Ends are closed and ground for stable seating.
Typical use cases include compression spring for 3D printer bed leveling, small compression spring for electronics enclosure latches, and replacement pressure spring for pneumatic valve assemblies — all scenarios where consistent spring rate and dimensional accuracy matter more than raw load capacity.
| Wire Diameter | 1.2 mm (0.047 in) |
|---|---|
| Outer Diameter (OD) | 6–28 mm (0.24–1.10 in) — See variant options |
| Free Length | 60–100 mm (2.36–3.94 in) — See variant options |
| Material | Spring Steel |
| End Type | Closed and Ground |
| Spring Rate | See variant options |
| Surface Finish | See variant options |
| Coil Direction | Right-hand (typical) |
| Pack Quantity | 5 Pcs / 20 Pcs |
| Application | General mechanical, DIY, electronics, pneumatic valves |
Measure the inner diameter of your spring pocket and select an OD that is 0.5–1 mm smaller to allow free movement without binding. For free length, add your required compressed length to the desired travel stroke. Use the variant selector above to find the exact Wire Dia × OD × Length combination.
Load capacity depends on OD, free length, and number of active coils — all of which vary by variant. Shorter free lengths and smaller ODs generally yield higher spring rates. If you need specific load data, contact us with your selected variant SKU and we can provide further guidance.
Spring steel offers moderate corrosion resistance suitable for dry or lightly oiled indoor environments. It is not recommended for continuous exposure to moisture, salt spray, or aggressive chemicals. For corrosive environments, consider stainless steel springs instead.
Yes. The smaller OD variants (6–10 mm) are commonly used in 3D printer bed leveling assemblies, button mechanisms, and electronics enclosure latches where a compact, consistent return force is needed. Verify the OD and free length against your specific design before ordering.
Both packs contain identical springs. The 5 Pcs pack suits single-unit repairs or prototyping, while the 20 Pcs pack offers a lower per-unit cost for batch production, maintenance stock, or projects requiring multiple springs of the same specification.
We recommend ordering the 5 Pcs pack first to confirm fit, travel, and load characteristics in your application. Once validated, the 20 Pcs pack provides a cost-effective way to stock up. Check the variant selector for the exact Wire Dia × OD × Length combination you need.
Yes, these springs feature closed and ground ends, which provide a flat seating surface. This reduces lateral deflection under load and ensures more consistent force transmission compared to open-end springs.
