0.7mm Wire Dia Compression Spring 4-7mm Dia 5-305mm Length A2 Stainless Steel

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0.7mm Wire Dia Compression Spring 4-7mm Dia 5-305mm Length A2 Stainless Steel

HomeDIYer

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By HomeDIYer®

Wire Dia x Outer Dia x Length: 0.7x4x120mm

Pack Size(Pcs): 5

Price:

$14.28 USD

Stock:

In stock (500 units), ready to be shipped

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0.7mm Wire Compression Spring in A2 Stainless Steel — Precise Force, Corrosion Resistance

When a small push-back spring fails, a whole assembly can stop working — a stuck latch, a button that won't return, a valve that won't seat. Makers, repair technicians, and DIY builders need a reliable coil that recovers its shape thousands of times without corroding. This 0.7mm wire compression spring is built for exactly those small-force, high-repetition jobs.

Each spring is wound from 0.7mm (0.028") A2 (304-grade) stainless steel wire, with an outer diameter of 4-7mm (0.16-0.28") and free lengths from 5mm to 305mm (0.20-12.0"). The open-coil, right-hand wound design compresses along its axis and returns to its free length when the load is released. Exact spring rate varies by chosen outer diameter and length — see variant options.

Typical uses include push-button return mechanisms, latch and lock assemblies, small pneumatic and valve returns, model and robotics builds, and general electronics or appliance repair. The A2 stainless construction makes it suitable for damp indoor and light outdoor environments where a plain-steel spring would rust.

🔧 Fits small return, latch, valve, and push-button assemblies designed for a 4-7mm outer diameter spring. Confirm your bore and length before ordering.

✅ Key Features of These Compression Springs

🧲 Wound from 0.7mm (0.028") A2 304-grade stainless steel wire for consistent, repeatable return force.
💧 Corrosion-resistant stainless finish suited to damp indoor and light outdoor use.
📏 Outer diameter 4-7mm (0.16-0.28") with free lengths from 5mm to 305mm (0.20-12.0") to match tight or extended travel.
🔁 Open-coil design compresses along its axis and recovers its free length after load release.
📦 Available in multiple pack sizes (1 to 200 pcs) for single repairs or batch builds.
🛠️ Well suited to latches, valves, push-buttons, robotics, and general appliance repair.

📐 Technical Specifications — Compression Spring

Spring Type	Compression spring, open-coil
Wire Diameter	0.7mm (0.028")
Outer Diameter	4-7mm (0.16-0.28"), see variant options
Free Length	5-305mm (0.20-12.0"), see variant options
Material	A2 (304-grade) stainless steel
Wind Direction	Right-hand
End Type	Closed ends (typical for compression springs)
Spring Rate	See variant options
Pack Size	1, 5, 10, 20, 50, 100 or 200 pcs, see variant options
Recommended Use	Indoor and light outdoor environments

❓ Frequently Asked Questions

How do I choose the right size for my project?

Match the outer diameter to your bore or housing (4-7mm here) and pick a free length close to your uncompressed travel. Measure the space the spring sits in before selecting a variant. If you are between sizes, choose the closest available option or contact us to confirm.

How strong is a 0.7mm wire compression spring?

These are light-to-medium force springs suited to small return and push-back tasks rather than heavy loading. Exact spring rate and maximum load depend on the outer diameter and free length you select — see variant options for the size you need.

Will these springs resist rust and corrosion?

Yes. They are made from A2 (304-grade) stainless steel, which resists corrosion in damp indoor and light outdoor conditions. For continuous saltwater or harsh chemical exposure, a higher-grade stainless is recommended.

What assemblies are these compatible with?

They fit small return mechanisms, latches, locks, valves, push-buttons, and robotics or model builds designed for a 4-7mm outer diameter spring. Always check your bore diameter and required length against the variant you choose.

Can I use these outdoors or in wet areas?

They are suitable for light outdoor and damp indoor use thanks to the stainless construction. For fully submerged or marine environments, contact us to confirm the right material grade.

Do the springs come individually or in packs?

You can choose pack sizes of 1, 5, 10, 20, 50, 100, or 200 pieces. Single pieces suit one-off repairs, while larger packs are better for batch builds and keeping spares on hand.

What does the free length measurement refer to?

Free length is the spring's total length when no load is applied. Choose a free length slightly longer than your uncompressed gap so the spring has room to compress and return.

🛒 Select your wire dia, outer dia, length, and pack size above, then add to cart.