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When your project demands consistent return force in a compact footprint, finding the right compression spring can be frustrating. Undersized springs lose tension; oversized ones bind in the bore. These 1.2mm wire diameter compression springs are engineered for makers, electronics hobbyists, mechanical engineers, and DIY enthusiasts who need dependable elastic performance in tight spaces.
Each spring is formed from 1.2mm round wire, with outer diameters (OD) ranging from 8mm to 22mm (approximately 0.31 in to 0.87 in) and free lengths from 10mm to 100mm (approximately 0.39 in to 3.94 in). The coil body is finished in a bright silver tone consistent with carbon steel or stainless steel wire construction. Sold in packs of 5 or 10 pieces depending on the length selected.
Typical use cases include compression spring replacements in pen mechanisms and clicker assemblies, return springs for small levers and latches in 3D-printed enclosures, and load-bearing springs in light-duty jigs, fixtures, and prototype mechanisms requiring a small OD compression spring with 1.2mm wire.
OD 8–22mm × wire 1.2mm × lengths 10–100mm — one listing covers a broad range of small compression spring sizes for prototyping and production.
Uniform 1.2mm wire diameter across all variants ensures predictable spring rate behavior and interchangeability within the same OD family.
End coils are closed to provide a flat seating surface, reducing lateral deflection and improving load alignment in guided spring applications.
Bright silver surface treatment helps resist light oxidation in indoor environments, extending service life in electronics and light mechanical assemblies.
Shorter lengths (10–50mm) ship in packs of 10; longer lengths (60–100mm) ship in packs of 5 — matched to typical project consumption rates.
Tightly wound coils maintain dimensional consistency across the pack, making these springs suitable for small OD compression spring applications in jigs, fixtures, and prototype assemblies.
| Wire Diameter | 1.2 mm (0.047 in) |
|---|---|
| Outer Diameter (OD) | 8 mm – 22 mm (0.31 in – 0.87 in) — see variant options |
| Free Length | 10 mm – 100 mm (0.39 in – 3.94 in) — see variant options |
| Material | See variant options |
| Surface Finish | Bright silver (natural / light treatment) |
| End Type | Closed ends |
| Spring Type | Compression (helical) |
| Spring Rate | See variant options |
| Pack Quantity | 5 pcs (lengths 60–100mm) / 10 pcs (lengths 10–50mm) |
| Application | Light-duty mechanical assemblies, electronics, DIY projects |
Measure the bore or housing your spring will sit in — the spring OD should be 0.5–1.5mm smaller than the bore ID to allow free movement. For free length, choose a spring that is 20–30% longer than your required compressed length to ensure adequate travel and preload. Use the variant selector above to match OD and length to your design.
All springs in this listing use a 1.2mm wire diameter. Wire diameter directly affects spring rate (stiffness) — a thicker wire produces a stiffer spring for the same OD and length. At 1.2mm, these springs are suited for light-to-medium return force applications such as pen mechanisms, small latches, and prototype assemblies.
The springs feature a bright silver surface finish that provides light oxidation resistance suitable for indoor environments. For outdoor or high-humidity applications, we recommend verifying the base material (contact us to confirm) and considering additional protective coatings. These springs are not rated for marine or chemically aggressive environments.
Shorter springs (10mm–50mm free length) are sold in packs of 10 pieces. Longer springs (60mm–100mm free length) are sold in packs of 5 pieces. The pack size is shown in the "Length(mm) & Quantity" variant option (e.g., "60mm & 5" means 60mm free length, 5 pieces per pack).
Yes. These small OD compression springs (8–22mm OD) are commonly used in 3D-printed enclosures, latches, and button mechanisms. Ensure your printed bore ID is at least 0.5mm larger than the spring OD you select, and that the pocket depth accommodates the compressed length of the spring under load.
These springs are suitable for non-conductive spring applications in electronics enclosures, battery contacts (verify conductivity requirements), and PCB test fixtures. If electrical conductivity is required, confirm the base material before use. The compact OD range (8–22mm) fits many standard electronics housing formats.
A larger OD at the same wire diameter and length will generally produce a lower spring rate (softer feel), while a smaller OD will produce a higher spring rate (stiffer feel). Choose the OD that fits your bore first, then verify the resulting spring rate meets your force requirements. Contact us if you need spring rate data for a specific variant.
