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When a worn-out spring causes a mechanism to fail — whether it's a pen, a valve, a latch, or a precision instrument — finding the exact replacement size is the real challenge. This pack of 10 stainless steel compression pressure springs is designed for hobbyists, engineers, and repair technicians who need reliable, dimensionally accurate small springs without ordering in bulk.
Each spring is formed from stainless steel wire with a wire diameter of 0.6mm, 0.7mm, or 0.8mm (select your size above). Outer diameters range from 5mm to 12mm (~0.20–0.47 in), and free lengths span from 5mm to 50mm (~0.20–1.97 in), giving you a wide selection matrix to match your exact application. Springs feature a tightly wound cylindrical coil body with flat or slightly ground ends typical of standard compression spring construction.
Ideal use cases include small appliance repair (pen mechanisms, clickers, latches), electronics enclosure spring contacts, DIY mechanical assemblies requiring return-force elements, model engineering and robotics prototyping, and replacement springs for jigs, fixtures, and tooling setups.
Formed from stainless steel wire, offering corrosion resistance suitable for indoor mechanical applications, light moisture exposure, and long-term storage without surface degradation.
Available in wire diameters of 0.6mm, 0.7mm, and 0.8mm, with outer diameters from 5mm to 12mm and free lengths from 5mm to 50mm — covering a broad range of small-spring applications in a single product listing.
Each order includes 10 springs of your selected size, giving you spares for prototyping, testing, or replacing multiple units in a single repair job without overstocking.
Standard cylindrical compression spring geometry ensures consistent deflection behavior and compatibility with typical spring seats, bores, and guide pins used in mechanical assemblies.
Suited for pen mechanisms, electronic contacts, latch returns, model engineering, robotics, jig fixtures, and any application requiring a small-diameter compression return spring.
Variants are labeled in wire diameter × outer diameter × free length format (e.g., 0.6×5×10mm), allowing you to match your replacement spring specification directly without guesswork.
| Material | Stainless Steel |
|---|---|
| Wire Diameter | 0.6mm / 0.7mm / 0.8mm (see variant options) |
| Outer Diameter | 5mm – 12mm (see variant options) |
| Free Length | 5mm – 50mm (see variant options) |
| Spring Type | Compression (cylindrical coil) |
| End Type | Closed / flat ends (typical for this wire gauge range) |
| Quantity per Pack | 10 pieces |
| Surface Finish | Natural stainless (no coating) |
| Spring Rate | See variant options |
| Max Load Capacity | See variant options |
| Inner Diameter | See variant options |
The three numbers represent: Wire Diameter × Outer Diameter × Free Length, all in millimeters. For example, 0.6×5×10mm means the wire is 0.6mm thick, the spring's outer coil diameter is 5mm, and its uncompressed (free) length is 10mm. Match all three dimensions to your application for a correct fit.
The inner diameter (ID) is approximately equal to the outer diameter minus twice the wire diameter. For example, a 0.6×5mm spring has an ID of approximately 5 – (2 × 0.6) = 3.8mm. Use this formula to check guide pin compatibility. For precise values, contact us to confirm before ordering.
Yes. These springs are made from stainless steel, which provides good resistance to oxidation and light moisture exposure. They are suitable for indoor mechanical applications and environments with occasional humidity. For submerged or highly corrosive environments, additional material verification is recommended.
Spring rate and load capacity vary by wire diameter, outer diameter, and free length. Thicker wire (0.8mm) and shorter free lengths generally produce stiffer springs with higher load capacity. For light-duty applications such as pen mechanisms, latches, and electronic contacts, these springs are well-suited. For load-critical applications, please contact us with your specific requirements.
Stainless steel offers better corrosion resistance than carbon steel, making these springs suitable for light outdoor or damp conditions. However, prolonged exposure to saltwater, strong acids, or highly corrosive chemicals is not recommended without confirming the specific stainless steel grade used.
Measure the existing spring or the spring seat in your mechanism: (1) Wire diameter — use calipers on the wire itself; (2) Outer diameter — measure the coil's widest point; (3) Free length — measure the spring at rest, uncompressed. Match all three to the variant options listed above. If you're replacing a broken spring, measure the seat bore and guide pin for OD and ID reference.
Yes. The small wire diameters (0.6–0.8mm) and fine outer diameter options (starting at 5mm) make these springs well-suited for pen mechanisms, spring contacts in electronics, small switches, and precision instrument return mechanisms where compact, consistent spring force is needed.
The listed variants cover a wide range of wire diameters, outer diameters, and free lengths. If you need a size not shown, please contact us through the store's contact page with your required wire diameter, outer diameter, free length, and quantity — we'll advise on availability.
