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When a project demands reliable spring force in a tight space, finding the right compression spring can be frustrating. Hobbyists, electronics repair technicians, and mechanical engineers working on compact assemblies need springs that deliver consistent load performance without taking up valuable room. These 0.6mm wire diameter compression springs are engineered for exactly those scenarios — offering dependable elastic return in a slender, lightweight form factor.
Each spring is formed from 0.6mm wire diameter steel, with outer diameters (OD) ranging from 4mm to 12mm (approximately 0.16" to 0.47") and free lengths spanning 5mm to 120mm (approximately 0.20" to 4.72"). The coil body is wound to close tolerances, providing uniform pitch and consistent spring rate across the full compression range. Inner diameters (ID) range from approximately 2.8mm to 10.8mm depending on the selected OD variant.
Typical use cases include pen mechanisms and retractable writing instruments, small electronic switch assemblies and PCB-mounted actuators, precision instrument housings, miniature valve and plunger return mechanisms, and DIY robotics or maker projects requiring compact elastic components.
OD from 4mm to 12mm and free lengths from 5mm to 120mm — one listing covers a broad spectrum of compact spring needs.
Slender wire gauge delivers light to moderate spring loads, ideal for delicate mechanisms where over-springing causes malfunction.
Uniform winding ensures even load distribution along the coil body, reducing side-load and buckling risk during compression.
Formed from steel wire for reliable elastic return and resistance to permanent set under repeated cycling within rated deflection.
Available in packs of 5 or 10 pieces — order the quantity that matches your project or prototyping batch size.
Choose your exact OD and free length combination from the variant selector — no guesswork, no cutting to length required.
| Wire Diameter | 0.6mm (approx. 0.024") |
|---|---|
| Outer Diameter (OD) | 4mm – 12mm (approx. 0.16" – 0.47") |
| Inner Diameter (ID) | 2.8mm – 10.8mm (varies by OD variant) |
| Free Length | 5mm – 120mm (approx. 0.20" – 4.72") |
| Material | Steel wire |
| Spring Type | Compression (open coil) |
| Coil Direction | See variant options |
| Surface Finish | See variant options |
| Spring Rate | See variant options |
| End Type | See variant options |
| Pack Quantity | 5 pcs or 10 pcs (select above) |
Measure the bore or housing that will contain the spring to determine the maximum allowable OD. Leave 0.2–0.5mm clearance between the spring OD and the bore wall. For free length, measure the available space when the spring is uncompressed, then confirm the compressed length meets your travel requirement. Use the variant selector above to pick your exact OD and length combination.
The ID is listed in the variant name in parentheses — for example, "0.6 x 4mm (ID:2.8)" means the OD is 4mm and the ID is 2.8mm. If you are mounting the spring over a guide rod, ensure the rod diameter is smaller than the listed ID to allow free movement without binding.
These compression springs are designed for repeated elastic cycling within their rated deflection range. Avoid compressing the spring to solid height (coil bind) during normal operation, as this can cause permanent set and reduce spring rate over time. For applications with very high cycle counts, confirm the spring rate and solid height against your travel requirements before committing to a design.
These springs are formed from steel wire and may be susceptible to surface oxidation in humid or wet environments without protective treatment. For outdoor or high-humidity applications, consider applying a light coat of corrosion-inhibiting oil or grease, or select a stainless steel spring variant if available. For indoor, dry, or enclosed applications, bare steel is typically adequate.
Yes. The 0.6mm wire diameter and small OD range (4–12mm) make these springs well-suited for switch actuators, battery contacts, connector plungers, and other PCB-adjacent applications. Verify that the spring's electrical conductivity (steel) is acceptable for your circuit design if the spring will be part of an electrical path.
If you are prototyping or need spares for a single repair, the 5-piece pack is a cost-effective starting point. For production runs, batch builds, or applications where you anticipate replacements over time, the 10-piece pack offers better per-unit value. Select your preferred quantity in the "Packaging (pcs)" option above.
Spring rate for a compression spring can be estimated using the formula: Rate = (G × d⁴) / (8 × D³ × n), where G is the shear modulus of the wire material, d is the wire diameter, D is the mean coil diameter, and n is the number of active coils. For a precise rate value for your selected variant, contact us to confirm — we are happy to provide additional technical data on request.
