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When a worn-out or missing spring brings your project to a halt — whether it's a jammed mechanism, a loose assembly, or a custom build that needs exact spring force — finding the right compression spring in the right size shouldn't be a guessing game. These stainless steel compression springs are designed for makers, engineers, hobbyists, and repair technicians who need reliable, corrosion-resistant coil springs in a wide range of sizes without ordering in bulk.
Each spring is wound from 0.6mm stainless steel wire, with outer diameters (OD) ranging from 4mm to 12mm (approximately 0.16" to 0.47") and free lengths from 5mm to 100mm (approximately 0.20" to 3.94"). The stainless steel construction provides inherent resistance to rust and oxidation, making these springs suitable for both indoor and outdoor environments. Sold in packs of 5 or 10 pieces depending on the length selected.
These compression springs are well-suited for a broad range of applications: small appliance repair and maintenance, RC model and robotics builds requiring precise return force, pen and clicker mechanisms, valve and plunger assemblies, jig and fixture construction, and custom DIY hardware projects where standard spring sizes are unavailable off the shelf.
Consistent 0.6mm stainless steel wire gauge across all variants for predictable spring rate and reliable performance in compact assemblies.
OD from 4mm to 12mm and free lengths from 5mm to 100mm — one listing covers the full spectrum so you can find the exact fit without sourcing from multiple suppliers.
Stainless steel wire resists rust, oxidation, and corrosion, extending service life in humid, wet, or outdoor environments compared to carbon steel alternatives.
Uniform coil pitch and consistent end finish ensure even load distribution and stable compression behavior throughout the spring's travel range.
Shorter lengths (5–50mm) ship in packs of 10; longer lengths (60–100mm) ship in packs of 5 — giving you spares for prototyping, testing, or replacement without over-ordering.
Compatible with pen mechanisms, valve assemblies, RC models, robotics, jigs, fixtures, and general DIY hardware — wherever a small-diameter compression spring is needed.
| Wire Diameter | 0.6mm (0.024") |
|---|---|
| Outer Diameter (OD) | 4mm – 12mm (0.16" – 0.47") |
| Free Length | 5mm – 100mm (0.20" – 3.94") |
| Material | Stainless Steel |
| Spring Type | Compression (open-end coil) |
| Coil Direction | See variant options |
| Spring Rate | See variant options |
| Surface Finish | Natural stainless (uncoated) |
| Pack Quantity | 10 pcs (lengths 5–50mm) / 5 pcs (lengths 60–100mm) |
| Weight (per pack) | See variant options |
Measure the bore or housing your spring sits in — the OD of the spring should be slightly smaller than the bore diameter to allow free movement. For the free length, measure the uncompressed space available and ensure the spring's free length is equal to or slightly longer than that space so it exerts force when installed. Use the variant selector above to match OD and length to your measured dimensions.
Spring rate depends on wire diameter, OD, free length, and number of active coils — all of which vary by variant. Because this listing covers a wide range of sizes, the spring rate differs per variant. If you need a specific spring rate for a load-critical application, please contact us with your OD, length, and required load so we can confirm suitability.
Yes. These springs are made from stainless steel wire, which provides good resistance to rust and oxidation in humid, wet, and mildly corrosive environments. They are suitable for outdoor DIY projects, marine-adjacent applications, and environments where carbon steel springs would corrode quickly. For highly aggressive chemical environments, please verify material compatibility with your specific conditions.
These springs are well-suited for compact mechanical assemblies requiring light to moderate spring force: pen and clicker mechanisms, small valve and plunger assemblies, RC model and robotics builds, jig and fixture construction, small appliance repair, and custom DIY hardware. The 0.6mm wire diameter makes them ideal for applications where space is limited and a fine, precise spring is needed.
Pack quantity depends on the length variant selected. Springs with free lengths from 5mm to 50mm are sold in packs of 10 pieces. Springs with free lengths from 60mm to 100mm are sold in packs of 5 pieces. The quantity is shown in the variant name (e.g., "30mm & 10pcs" or "80mm & 5pcs") so you always know exactly what you're ordering.
These springs can serve as replacements provided the OD, free length, and wire diameter match your original spring's specifications. Before ordering, measure your existing spring's outer diameter, free length, and wire thickness. If the original spring has a specific spring rate requirement, contact us to confirm compatibility. For general DIY repair and hobby use, these springs are a reliable and accessible replacement option.
The pack size reflects the spring length: shorter springs (5–50mm free length) come in 10-piece packs, while longer springs (60–100mm free length) come in 5-piece packs. Longer springs have greater material content per unit, so the pack size is adjusted accordingly. Both pack sizes are priced to give you useful working quantities for prototyping, repair, or small-batch production.
