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When a loose mechanism, rattling component, or under-tensioned assembly keeps interrupting your project, the culprit is almost always a spring that doesn't match the load. Engineers, hobbyists, and repair technicians who work with compact mechanisms need compression springs that hold their rated force without creeping, corroding, or losing shape over time. These stainless steel compression springs are sized for exactly those demanding, detail-oriented tasks.
Each spring is formed from stainless steel wire with a diameter of 0.6 mm, 0.7 mm, or 0.8 mm (approximately 0.024"–0.031"). Outer diameters span 4 mm to 14 mm (approx. 0.16"–0.55"), and free lengths range from 5 mm to 50 mm (approx. 0.20"–1.97"). Springs are sold in packs of 10 pieces per variant, giving you spares on hand for prototyping or batch repairs.
Typical use cases include electronic device button mechanisms requiring a small-diameter compression spring for tactile feedback, precision instrument assemblies where a stainless steel small spring resists moisture and chemical exposure, and DIY mechanical projects such as pen mechanisms, valve assemblies, and miniature actuators that call for a reliable pressure spring in tight spaces.
Available in 0.6 mm, 0.7 mm, and 0.8 mm wire diameters to match a wide range of load and deflection requirements in compact assemblies.
Outer diameters from 4 mm to 14 mm and free lengths from 5 mm to 50 mm give you precise dimensional control without custom fabrication.
Stainless steel wire resists oxidation and mild corrosive environments, maintaining spring rate stability in humid or lightly chemical-exposed conditions.
Uniform coil pitch and wire diameter ensure repeatable deflection behavior across all 10 pieces in a pack — critical for batch assembly work.
Each variant ships as a 10-piece set, providing spares for prototyping, replacements, or multi-unit builds without over-ordering.
Closed and ground-style ends (typical for this spring class) provide flat seating surfaces for stable load transfer in bores and against flat plates.
| Material | Stainless Steel |
|---|---|
| Wire Diameter | 0.6 mm / 0.7 mm / 0.8 mm (approx. 0.024"–0.031") |
| Outer Diameter (OD) | 4 mm – 14 mm (approx. 0.16"–0.55") — See variant options |
| Free Length | 5 mm – 50 mm (approx. 0.20"–1.97") — See variant options |
| Spring Type | Compression |
| End Style | See variant options |
| Spring Rate | See variant options |
| Surface Finish | Natural stainless steel |
| Quantity per Pack | 10 Pieces |
| Weight per Pack | See variant options |
Wire diameter determines the spring's stiffness and load capacity. A thicker wire (0.8 mm) produces a stiffer spring with a higher spring rate, while a thinner wire (0.6 mm) gives a softer, more compliant spring. Match the wire diameter to your required load: use 0.6 mm for very light tactile or return forces, 0.7 mm for moderate loads, and 0.8 mm when you need firmer resistance in a compact space.
The outer diameter (OD) must fit inside your bore or housing with a small clearance — typically 0.1–0.3 mm smaller than the bore ID. The free length should be longer than your required compressed length to ensure the spring exerts force throughout the full travel. Measure your available cavity depth and required travel, then select a free length that provides adequate preload and working deflection.
These springs are designed for light-duty to medium-duty applications in compact mechanisms — such as electronics, instruments, pens, valves, and hobby assemblies. They are not rated for heavy industrial loads. For high-cycle fatigue or heavy-load applications, consult a spring engineer and verify the spring rate and solid height against your design requirements.
Stainless steel offers significantly better corrosion resistance than carbon steel springs. These springs are suitable for humid environments, light moisture exposure, and mild chemical contact. However, stainless steel is not fully immune to corrosion in highly acidic, chloride-rich, or salt-spray environments. For harsh chemical exposure, verify the specific stainless steel grade against your media.
Yes. The small wire diameters (0.6–0.8 mm) and compact outer diameters (starting at 4 mm) make these springs well-suited for button mechanisms, battery contacts, connector pins, and other PCB-adjacent applications. Stainless steel also avoids the magnetic interference concerns associated with some carbon steel springs.
Check three dimensions: (1) Outer Diameter — must be smaller than your bore ID by at least 0.1–0.3 mm clearance. (2) Free Length — must be longer than your compressed length to generate force. (3) Wire Diameter — determines stiffness; cross-reference with your load requirement. The variant selector shows Wire Dia × Outer Dia × Length in millimeters for easy matching.
Compression springs in this size range are frequently used in multiples (e.g., four springs per assembly) or require replacements during prototyping. A 10-piece pack ensures you have spares on hand, reduces per-unit cost, and avoids project delays caused by a single failed or lost spring.
