Compression Spring 0.7mm Wire Dia 8-12mm Dia 10-200mm Length A2 Stainless Steel

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Compression Spring 0.7mm Wire Dia 8-12mm Dia 10-200mm Length A2 Stainless Steel

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By HomeDIYer®

Wire Dia x Outer Dia x Length: 0.7x8x10mm

Pack Size(Pcs): 10

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$5.29 USD

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In stock (500 units), ready to be shipped

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Compression Springs with 0.7mm Wire Diameter — Reliable Force in a Compact Form

Finding a compression spring that fits a tight bore without sacrificing return force is a common challenge for makers, engineers, and repair technicians. These A2 stainless steel compression springs are engineered for applications where space is limited but consistent spring pressure is non-negotiable — from precision instruments and electronic enclosures to valve assemblies and jig fixtures.

Each spring is wound from 0.7mm wire diameter A2 (304-grade) stainless steel, offering a balanced combination of tensile strength and corrosion resistance. Outer diameters range from 8mm to 12mm (approx. 0.31" to 0.47"), and free lengths span 10mm to 200mm (approx. 0.39" to 7.87"), giving you precise control over spring rate and travel distance. Pack sizes of 5, 10, 20, 50, 100, or 200 pieces let you stock exactly what your project demands.

Typical use cases include compression spring replacement in small appliances and power tools, spring-loaded latch and button mechanisms in enclosures, and custom jig or fixture tensioning in workshop and prototyping environments — all scenarios where a reliable small-diameter compression spring with stainless steel corrosion resistance is essential.

🔩 Compatible with standard spring bores from 8mm to 12mm OD. Verify inner bore clearance and free length against your application before ordering.

✅ Key Features of These A2 Stainless Steel Compression Springs

🧲 A2 Stainless Steel Construction — 304-grade wire resists rust, oxidation, and mild chemical exposure, making these springs suitable for humid, outdoor, and light industrial environments.
📏 Wide Size Range in One Listing — Wire dia 0.7mm, outer diameters 8–12mm (0.31"–0.47"), free lengths 10–200mm (0.39"–7.87") — select the exact combination from the variant dropdown.
⚙️ Consistent Coil Pitch & Parallelism — Uniform winding ensures even load distribution and predictable deflection, reducing side-load stress on guide pins and bores.
🔄 Closed & Ground Ends — Flat, squared ends provide stable seating on flat surfaces and reduce buckling tendency during compression cycles.
📦 Flexible Pack Quantities — Available in packs of 5, 10, 20, 50, 100, or 200 pieces, ideal for single repairs, prototyping batches, or production-level stocking.
🛠️ Broad Application Compatibility — Suited for spring-loaded buttons, valve returns, pen mechanisms, electronic enclosures, jig tensioners, and small machinery assemblies.

📐 Technical Specifications — Compression Spring

Material	A2 Stainless Steel (304 Grade)
Wire Diameter	0.7mm (0.028")
Outer Diameter	8mm – 12mm (0.31" – 0.47") — See variant options
Free Length	10mm – 200mm (0.39" – 7.87") — See variant options
End Type	Closed & Ground
Spring Rate	See variant options
Surface Finish	Natural (uncoated stainless)
Pack Size	5 / 10 / 20 / 50 / 100 / 200 pcs — See variant options
Corrosion Resistance	Suitable for humid and mild chemical environments
Operating Temperature	Typically –20°C to +200°C (–4°F to +392°F)

❓ Frequently Asked Questions

How do I choose the right outer diameter and free length?

Measure the bore or housing your spring will sit in — the spring's outer diameter should be 0.5mm to 1mm smaller than the bore for smooth travel. For free length, select a value approximately 20–30% longer than your required compressed height to ensure adequate preload and travel range.

Are these springs strong enough for mechanical assemblies?

With a 0.7mm wire diameter, these springs are designed for light-to-medium duty applications — spring-loaded buttons, pen mechanisms, valve returns, and small fixture tensioners. For heavy-duty industrial loads requiring higher spring rates, a thicker wire diameter would be more appropriate.

Will these springs rust or corrode outdoors?

A2 (304-grade) stainless steel offers solid resistance to rust, oxidation, and mild chemical exposure. These springs perform well in humid, damp, and light outdoor environments. For highly corrosive or marine environments, A4 (316-grade) stainless steel would provide superior protection.

Are these compatible with standard spring guides and pins?

Yes. The inner diameter (ID) of each spring is approximately the outer diameter minus 1.4mm (twice the wire diameter). For example, an 8mm OD spring has an ID of approximately 6.6mm. Ensure your guide pin is at least 0.3–0.5mm smaller than the ID for smooth, wobble-free operation.

Can I use these springs in high-temperature environments?

A2 stainless steel compression springs typically operate reliably between –20°C and +200°C (–4°F to +392°F). For applications exceeding this range, consider high-temperature alloy springs. Prolonged exposure above 150°C may cause gradual stress relaxation and reduced spring force over time.

Which pack size should I order for a repair or prototype?

For a single repair or initial prototype, the 5- or 10-piece pack is the most cost-effective choice. If you are running a small production batch or need spares on hand, the 50- or 100-piece pack offers better per-unit value. The 200-piece pack is suited for production stocking or bulk workshop supply.

What is the difference between free length and compressed length?

Free length is the natural, unloaded length of the spring as listed in the variant options. Compressed length (solid height) is the minimum length when all coils are fully closed. For 0.7mm wire springs, solid height is approximately equal to the number of coils multiplied by 0.7mm. Always ensure your assembly allows the spring to operate between free length and solid height without bottoming out.

🛒 Select your Wire Dia x Outer Dia x Length and Pack Size above, then add to cart.

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These o rings are a great for my ear tunnels

These o rings are a great for my ear tunnels, always loosing one here and there, I always have a new ones in the drawer. Being silicone, don't have any reactions compared to standard rubber ones I purchased at hardware stores, plus much less expensive. Purchased 16mm I'd to use on 19mm tunnels, and stay on great, might be able to get away with 17mm rings, but really happy with my choice.

Will never order from these folks again

I waited a long time and that’s all I received was the eyebolt with no threaded rod attached to it

Perfect they are really made well and I used them for my car

Perfect they are really made well and I used them for my car. The only thing I had a great for us. It took three weeks to get here. So shipping was slow.

did not include wing nuts

Hi Scott, thank you for your feedback. We're sorry for any inconvenience caused. Please get in touch with us directly, and we'll assist you. Thanks for shopping with HomeDIYer!

Haven't received the order yet! It's been over

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Compression Spring 0.7mm Wire Dia 8-12mm Dia 10-200mm Length A2 Stainless Steel

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DIY Expert Support

Description

Compression Springs with 0.7mm Wire Diameter — Reliable Force in a Compact Form

✅ Key Features of These A2 Stainless Steel Compression Springs

📐 Technical Specifications — Compression Spring

❓ Frequently Asked Questions

Compression Spring 0.7mm Wire Dia 8-12mm Dia 10-200mm Length A2 Stainless Steel

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