Compression Spring Various Size Wire Diameter 0.2~0.5mm Stainless Steel
Compression Spring Various Size Wire Diameter 0.2~0.5mm Stainless Steel
Compression Spring Various Size Wire Diameter 0.2~0.5mm Stainless Steel
Compression Spring Various Size Wire Diameter 0.2~0.5mm Stainless Steel
Compression Spring Various Size Wire Diameter 0.2~0.5mm Stainless Steel
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Compression Spring Various Size Wire Diameter 0.2~0.5mm Stainless SteelCompression Spring Various Size Wire Diameter 0.2~0.5mm Stainless SteelCompression Spring Various Size Wire Diameter 0.2~0.5mm Stainless SteelCompression Spring Various Size Wire Diameter 0.2~0.5mm Stainless SteelCompression Spring Various Size Wire Diameter 0.2~0.5mm Stainless Steel

Compression Spring Various Size Wire Diameter 0.2~0.5mm Stainless Steel

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Price:
$3.88 USD
Stock:
In stock (500 units), ready to be shipped

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Description

Compression Spring 0.2–0.5mm Wire Diameter — Precision Stainless Steel for Tight Spaces

Finding a reliable small-diameter compression spring that holds its load rating without corroding is a constant challenge for makers, repair technicians, and mechanical engineers. These stainless steel compression springs are engineered for applications where wire diameter precision and corrosion resistance matter most — from miniature electronics assemblies to precision instruments and hobby robotics.

Each spring is wound from stainless steel wire in diameters ranging from 0.2 mm to 0.5 mm (approx. 0.008–0.020 in), with outer diameters spanning 1.5 mm to 12 mm (approx. 0.059–0.472 in). Free lengths range from 5 mm to 305 mm (approx. 0.20–12.0 in). Packing quantities vary by size: 1, 3, 5, 10, or 20 pieces per order, letting you stock exactly what you need.

Typical use cases include compression spring replacements in pen mechanisms and click-button assemblies, return springs in miniature valves and solenoids, and preload springs in optical instrument focusing stages — all scenarios where a small-diameter stainless steel compression spring with consistent spring rate is critical.

🔧 Compatibility: Suitable for general mechanical assemblies, DIY projects, electronics enclosures, and precision instruments requiring small-diameter compression springs. Verify inner bore clearance and free length against your application before ordering.

✅ Key Features of These Stainless Steel Compression Springs

  • 🔩Wide Size Matrix — Wire diameters 0.2, 0.3, 0.4, and 0.5 mm paired with outer diameters from 1.5 mm to 12 mm give you precise dimensional control for tight-tolerance bores.
  • 🛡️Stainless Steel Construction — Corrosion-resistant alloy maintains spring rate in humid, mildly acidic, or outdoor environments where carbon steel would degrade.
  • 📏Broad Length Range — Free lengths from 5 mm to 305 mm (0.20–12.0 in) cover everything from ultra-compact button springs to longer return springs in mechanical linkages.
  • 📦Flexible Pack Quantities — Order 1, 3, 5, 10, or 20 pieces depending on your project scale — no need to buy bulk when you only need a few.
  • ⚙️Consistent Coil Geometry — Uniform pitch and closed ends (typical for this spring class) ensure stable seating and repeatable deflection behavior across the size range.
  • 🔬Precision-Wound Wire — Tight wire diameter tolerances (typically ±0.02 mm) support accurate load calculations in engineering and prototyping contexts.

📐 Technical Specifications — Compression Springs

Material Stainless Steel
Wire Diameter Range 0.2 mm – 0.5 mm (0.008–0.020 in)
Outer Diameter Range 1.5 mm – 12 mm (0.059–0.472 in)
Free Length Range 5 mm – 305 mm (0.20–12.0 in)
Spring Type Compression (closed ends, typical)
Coil Direction See variant options
Spring Rate See variant options
Surface Finish Natural stainless (no coating)
Packing Quantity 1 / 3 / 5 / 10 / 20 PCS (varies by variant)
Operating Temperature Typically –20°C to +200°C (–4°F to +392°F)

❓ Frequently Asked Questions

How do I choose the right wire diameter and outer diameter for my application?

Start with the bore or housing inner diameter your spring must fit inside — the spring's outer diameter should be 0.1–0.3 mm smaller than the bore for a sliding fit. Then select the wire diameter based on the load you need: thicker wire (e.g., 0.5 mm) produces a stiffer spring for the same outer diameter and free length. Use the variant selector above to match both dimensions to your design requirements.

Are these springs strong enough for load-bearing mechanical assemblies?

These are small-diameter precision springs intended for light-duty to medium-duty applications such as button returns, instrument preloads, and miniature valve actuation. Wire diameters of 0.2–0.5 mm are not designed for heavy structural loads. If your application requires significant force (over a few Newtons), consider a larger wire diameter spring. Contact us to confirm suitability for your specific load case.

Will stainless steel springs corrode in outdoor or humid environments?

Stainless steel offers significantly better corrosion resistance than carbon steel, making these springs suitable for humid, mildly acidic, or outdoor environments. However, prolonged exposure to chloride-rich environments (e.g., saltwater) may cause surface pitting over time. For marine applications, verify the specific stainless alloy grade meets your corrosion requirements.

What is the difference between the 10 PCS, 5 PCS, 3 PCS, and 1 PCS packing options?

The packing quantity reflects how many individual springs are included in one order of that variant. Smaller packs (1 or 3 PCS) are available for longer lengths (120–305 mm) where individual spring weight and cost are higher. Shorter springs (5–50 mm) are typically available in 10 or 20 PCS packs. Select the quantity that matches your project needs using the "Length & Packing Quantity" option above.

Are these springs compatible with standard spring plungers or ball-detent mechanisms?

Compatibility depends on the plunger bore diameter and required spring free length. Check the outer diameter of the spring against the plunger housing bore — the spring OD should be slightly smaller than the bore ID. The free length should match or slightly exceed the plunger travel distance. Use the variant selector to find a matching size combination.

Can I use these springs in electronics or PCB assemblies?

Yes. Small-diameter stainless steel compression springs are commonly used in PCB test fixtures, battery contacts, pogo-pin assemblies, and tactile switch mechanisms. The 0.2–0.3 mm wire diameter variants with 1.5–3 mm outer diameters are particularly suited to compact electronics applications. Confirm the spring's free length and compressed height against your PCB stack-up before ordering.

How do I measure a spring I need to replace?

Measure three key dimensions: (1) outer diameter with calipers, (2) wire diameter with a micrometer or fine calipers, and (3) free length (uncompressed) with a ruler. Match these to the variant options above. If your existing spring is slightly worn or set, add 5–10% to the free length measurement to account for fatigue-related length loss.

🛒 Select your Wire Diameter, Outer Diameter, and Length & Packing Quantity above, then add to cart.

 

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