Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When a project demands consistent spring force in a compact form, undersized or mismatched springs cause frustrating failures — slipping out of seat, bottoming out prematurely, or corroding after the first exposure to moisture. These compression springs are sized for makers, engineers, and repair technicians who need a reliable off-the-shelf solution across a wide range of OD and free-length combinations.
Each spring is wound from 1mm wire diameter stainless steel, with outer diameters (OD) spanning 11mm to 20mm (approx. 0.43" to 0.79") and free lengths from 10mm to 120mm (approx. 0.39" to 4.72"). The coil body is cylindrical with closed and ground ends, providing flat seating surfaces for stable load application. Sold in packs of 5 or 10 pieces depending on the length selected.
Typical use cases include compression spring replacement in mechanical assemblies, DIY jigs and fixtures requiring controlled return force, prototype tooling for robotics and automation, valve and plunger mechanisms in fluid systems, and hobby electronics enclosures needing panel-mount retention.
Consistent 1mm wire gauge across all size options ensures predictable spring rate and deflection behavior for light-to-medium load applications.
Ten outer diameter options (11mm through 20mm, approx. 0.43"–0.79") let you match the exact bore or seat diameter your design requires without custom fabrication.
Nineteen length options from 10mm to 120mm (0.39"–4.72") cover short-stroke return applications through longer travel mechanisms in a single product family.
Wound from stainless steel wire for corrosion resistance in humid, wet, or mildly corrosive environments — suitable for both indoor and outdoor assemblies.
Flat, ground end coils provide stable seating contact, reducing lateral buckling tendency and ensuring the spring sits squarely in its housing or against a flat surface.
Available in packs of 10 (shorter lengths) or 5 (longer lengths), so you can stock the right quantity for prototyping, repair, or small-batch production runs.
| Wire Diameter | 1mm (0.039") |
|---|---|
| Outer Diameter (OD) | 11mm – 20mm (0.43" – 0.79") |
| Free Length Range | 10mm – 120mm (0.39" – 4.72") |
| End Type | Closed and Ground |
| Coil Direction | Right-hand (typical) |
| Material | Stainless Steel |
| Spring Rate | See variant options |
| Inner Diameter (ID) | See variant options |
| Number of Active Coils | See variant options |
| Surface Finish | Natural (uncoated) |
| Pack Quantity | 5 pcs (55mm–120mm lengths) / 10 pcs (10mm–50mm lengths) |
Measure the bore or seat diameter in your assembly — the spring OD should be slightly smaller than the bore (typically 0.5–1mm clearance) so it slides in without binding. For free length, choose a spring that is longer than your required compressed length to ensure adequate preload and travel. If you are replacing an existing spring, match the OD and free length of the original as closely as possible.
A 1mm wire diameter spring is suited for light-to-medium loads, typically in the range of a few Newtons to tens of Newtons depending on the OD, free length, and number of active coils. For precise load requirements, contact us to confirm the spring rate for your selected variant before ordering.
Yes. These springs are wound from stainless steel wire, which provides good resistance to rust and oxidation in humid, wet, and mildly corrosive environments. They are suitable for outdoor use, light marine environments, and applications where occasional moisture exposure is expected. For highly aggressive chemical environments, please contact us to confirm suitability.
Closed ends mean the last coil is wound tightly against the adjacent coil with no gap, and ground ends mean the end face is machined flat. This combination creates a stable, flat seating surface that distributes load evenly, reduces lateral buckling, and allows the spring to sit squarely against flat plates or inside housings — important for consistent performance in precision assemblies.
Yes. The wide range of OD (11–20mm) and length (10–120mm) options makes these springs well-suited for robotics end-effectors, automation jigs, panel-mount retention mechanisms, button return mechanisms in electronics enclosures, and prototype tooling. The stainless steel construction also makes them compatible with environments where non-magnetic or corrosion-resistant materials are preferred.
Shorter length variants (10mm–50mm) are available in 10-piece packs, which is ideal for prototyping, repair stock, or applications requiring multiple springs per assembly. Longer length variants (55mm–120mm) are available in 5-piece packs. Select the pack size that matches your project quantity needs — both options are priced per pack as shown.
The inner diameter varies by OD variant. As a general guide, ID = OD minus twice the wire diameter (ID ≈ OD − 2mm for 1mm wire). For example, the 11mm OD variant has an approximate ID of 9mm. Exact ID values for each variant are available — contact us to confirm before ordering if your application requires a specific shaft or pin fit.
