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When a mechanism fails because a tiny spring loses tension or snaps under repeated cycling, the repair window is narrow and the right replacement is hard to find. Engineers, hobbyists, and repair technicians working on electronics, instruments, pens, valves, and miniature assemblies need a reliable source of accurately dimensioned small compression springs that ship in usable quantities.
These compression springs are wound from stainless steel wire with a diameter of 0.6 mm (0.024 in). The outer diameter (O.D.) ranges from 4 mm to 12 mm (approx. 0.16 in to 0.47 in), and free lengths span 5 mm to 50 mm (approx. 0.20 in to 1.97 in). Each listing ships in a pack of 10 or 50 pieces of the same size, giving you spares on hand for future repairs.
Typical use cases include replacing worn compression springs in ballpoint pens and mechanical pencils, restoring spring tension in miniature push-button switches and latches, and maintaining consistent preload in precision instruments, sensors, and small pneumatic or hydraulic valves where a 0.6 mm wire dia compression spring is specified.
Each spring is wound from 0.6 mm stainless steel wire, keeping coil geometry uniform across the full size range from OD 4 mm to OD 12 mm.
Nine outer diameter steps (4–12 mm) combined with ten free-length steps (5–50 mm) give you 90 distinct size combinations to match your exact application.
Stainless steel wire resists oxidation and light corrosion, making these springs suitable for humid environments, light wash-down conditions, and long-term storage without surface degradation.
Available in 10-piece and 50-piece packs so you can stock the right quantity — a small trial pack or a bulk supply for production or repair kits.
Close-wound coils and consistent wire diameter deliver repeatable deflection and return force cycle after cycle, reducing the risk of premature fatigue in light-load applications.
With an OD starting at just 4 mm, these springs fit into confined bores and housings where standard-catalogue springs are too large, making them a go-to for electronics repair and instrument work.
| Wire Diameter | 0.6 mm (0.024 in) |
|---|---|
| Outer Diameter (O.D.) | 4 mm – 12 mm (0.16 in – 0.47 in) — see variant options |
| Free Length | 5 mm – 50 mm (0.20 in – 1.97 in) — see variant options |
| Material | Stainless Steel |
| Spring Type | Compression |
| End Type | See variant options |
| Spring Rate | See variant options |
| Surface Finish | Bare / Natural stainless |
| Pack Quantity | 10 PCS or 50 PCS — select above |
| Coil Direction | Right-hand (typical) |
Measure the bore or housing your spring sits in to determine the maximum allowable O.D., then measure the gap the spring must fill at rest (free length) and the compressed height you need. Select the variant whose O.D. is slightly smaller than the bore and whose free length matches your unloaded gap. If you are replacing an existing spring, match all three dimensions: wire dia, O.D., and free length.
A 0.6 mm wire diameter spring is designed for light-duty loads — typically in the range of a few grams to a few hundred grams depending on O.D. and free length. These springs are suited for pen mechanisms, small latches, push-button switches, and instrument components rather than heavy mechanical assemblies. If your application requires higher forces, consider a larger wire diameter.
Yes. The springs are made from stainless steel, which provides good resistance to oxidation and mild corrosion in humid or lightly wet environments. They are not rated for immersion in aggressive chemicals or salt-spray environments without additional protection. For outdoor or marine use, verify the specific grade of stainless steel meets your corrosion requirements.
Many ballpoint pen and mechanical pencil mechanisms use springs in the 4–6 mm O.D. range with free lengths of 5–20 mm and wire diameters around 0.5–0.7 mm. The 0.6 mm wire dia variants with OD 4–6 mm and lengths 5–20 mm are commonly used for these repairs. Measure your original spring before ordering to confirm the match.
Yes. The small O.D. range (4–12 mm) and short free lengths (5–50 mm) make these springs suitable for use as contact springs, battery contacts, and push-button return springs in electronic assemblies. Stainless steel also provides adequate electrical conductivity for low-current contact applications, though it is not optimised for high-conductivity requirements.
Both packs contain identical springs of the same size. The 10 PCS pack is suited for one-off repairs or prototyping where you need a small quantity. The 50 PCS pack offers a lower per-unit cost and is practical for production runs, repair kits, or stocking multiple sizes. Select your preferred quantity using the Packing Quantity option above.
Use a digital caliper to measure: (1) wire diameter — the thickness of the wire itself; (2) outer diameter — the widest point across the coil; (3) free length — the total length of the spring when uncompressed. Match all three values to the variant options. If your original spring is slightly worn or deformed, measure the bore and housing dimensions as a cross-check.
