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When your project demands consistent return force in a compact form factor, finding the right compression spring can be frustrating — wrong wire gauge, wrong outer diameter, or a length that just doesn't fit. These 0.8mm wire diameter compression springs are engineered for hobbyists, makers, engineers, and repair technicians who need dependable elastic performance in tight spaces.
Each spring is formed from spring steel wire with a nominal wire diameter of 0.8mm (approx. 0.031 in). Outer diameters span 5mm to 16mm (approx. 0.20–0.63 in), and free lengths range from 10mm to 100mm (approx. 0.39–3.94 in). Sold in packs of 5 or 10 pieces depending on the selected length variant.
Typical use cases include small-pressure coil spring replacement in mechanical assemblies, DIY electronics enclosures requiring button return mechanisms, precision instrument repair needing compact compression spring sets, and hobby robotics or automation projects requiring consistent spring force in confined spaces.
Formed from spring steel wire for consistent elastic return and resistance to permanent deformation under repeated compression cycles.
Uniform 0.8mm wire gauge across all variants ensures predictable spring rate and force characteristics for small-load applications.
OD options from 5mm to 16mm combined with free lengths from 10mm to 100mm give you a broad selection to match your exact housing geometry.
Shorter lengths (10–50mm) ship in 10-piece packs; longer lengths (60–100mm) ship in 5-piece packs — ideal for prototyping and repair stock.
Spring steel material provides inherent resistance to light oxidation in typical indoor environments; suitable for dry mechanical assemblies.
Closed-end coil geometry distributes load evenly across the spring body, reducing lateral buckling risk in guided spring applications.
| Wire Diameter | 0.8mm (approx. 0.031 in) |
|---|---|
| Outer Diameter (OD) | 5mm – 16mm (approx. 0.20–0.63 in) — See variant options |
| Free Length | 10mm – 100mm (approx. 0.39–3.94 in) — See variant options |
| Material | Spring Steel |
| Spring Type | Compression (Coil) |
| End Type | Closed ends (typical for this wire gauge) |
| Spring Rate | See variant options |
| Surface Finish | See variant options |
| Quantity per Pack | 5 pcs (lengths 60–100mm) / 10 pcs (lengths 10–50mm) |
| Operating Temperature | Contact us to confirm |
Measure the inner diameter of the housing or bore where the spring will sit. The spring's outer diameter should be slightly smaller than the bore ID to allow free movement without binding. For guided-rod applications, the spring's inner diameter (OD minus 2× wire diameter) should clear the rod with a small gap. Select your OD from the variant options above.
Free length is the uncompressed length of the spring. Choose a free length longer than your required working length to ensure the spring remains under compression (and thus exerts force) throughout its travel. A common rule of thumb is to select a free length at least 20–30% longer than the compressed working length.
With a 0.8mm wire diameter, these are light-duty compression springs suited for small-pressure applications such as button returns, latch mechanisms, valve seats, and precision instrument components. They are not designed for heavy industrial loads. Exact spring rate depends on the OD and free length selected — contact us if you need specific load data.
These springs are made from spring steel, which offers moderate resistance to light oxidation in dry indoor environments. They are not recommended for prolonged exposure to moisture, salt spray, or corrosive chemicals. For wet or outdoor environments, consider stainless steel springs instead.
Yes — the range of OD options (5mm to 16mm) covers many standard spring pocket sizes used in DIY hardware, electronics enclosures, and mechanical assemblies. Always verify the OD, free length, and wire diameter against your specific housing dimensions before ordering.
Absolutely. The compact size and consistent spring steel construction make these well-suited for hobby robotics, 3D-printed mechanisms, servo return springs, and small actuator assemblies where a reliable, repeatable compression force is needed in a confined space.
Longer springs (60mm–100mm) are larger and heavier per unit, so pack quantities are adjusted to 5 pieces to keep the pack size practical for shipping and storage. Shorter lengths (10mm–50mm) are supplied in 10-piece packs for prototyping convenience.
