Spring steel compression springs with a diameter of 2-35mm and a length of 300mm

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Spring steel compression springs with a diameter of 2-35mm and a length of 300mm

HomeDIYer

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By HomeDIYer®

Length(mm): 300 mm

Wirediameter: 0.3 mm

Diameter & Qty (pcs): 2.0 mm & 1 pcs

Price:

$5.06 USD

Stock:

In stock (500 units), ready to be shipped

Quantity:

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Spring Steel Compression Springs — Precise 300mm Length, 2–35mm Diameter Range

When a worn-out or undersized spring causes equipment downtime, finding the exact replacement fast is critical. Whether you are a workshop technician, a machinery maintenance professional, or a hands-on DIY builder, having a reliable stock of correctly sized compression springs prevents costly delays and keeps your projects moving.

These compression springs are manufactured from spring steel wire with diameters ranging from 0.3 mm to 3 mm and a fixed body length of 300 mm (approximately 11.8 inches). Outer diameters span 2.0 mm to 40 mm (approximately 0.08–1.57 inches), giving you a broad selection to match your application. Each spring is sold individually or in small multi-packs depending on the variant selected.

Typical use cases include mechanical actuator return springs for industrial automation, valve spring replacements in pneumatic and hydraulic systems, and custom compression spring assemblies for DIY robotics, 3D printer extruder mechanisms, and jig-and-fixture builds requiring consistent spring force over a 300 mm travel path.

🔧 Compatibility: Suitable for general mechanical assemblies, automation equipment, pneumatic valves, DIY robotics, and custom fabrication projects requiring a 300 mm compression spring. Match wire diameter and outer diameter to your housing bore and shaft dimensions before ordering.

✅ Key Features of These Spring Steel Compression Springs

🔩

Wide Diameter Selection

Outer diameters from 2.0 mm to 40 mm (0.08–1.57 in) and wire diameters from 0.3 mm to 3 mm cover a broad range of mechanical applications in a single product family.

📏

Fixed 300 mm Body Length

A consistent 300 mm (11.8 in) free length ensures predictable spring travel and force characteristics, simplifying design calculations for your assembly.

⚙️

Spring Steel Construction

Made from spring steel wire, these compression springs deliver reliable elastic return force and resist permanent deformation under repeated cyclic loading.

🛡️

Corrosion-Resistant Finish

The spring steel material provides inherent resistance to surface oxidation under normal indoor and light-industrial conditions, extending service life in typical workshop environments.

📦

Flexible Quantity Options

Available as single pieces or in multi-packs (2, 3, or 5 pcs depending on variant), so you can stock exactly what your project or maintenance schedule requires.

🔄

Direct Replacement Ready

Consistent dimensional tolerances make these springs suitable as direct replacements in existing machinery, reducing measurement guesswork during maintenance and repair.

📐 Technical Specifications — Compression Springs

Material	Spring Steel
Body Length	300 mm (11.8 in)
Wire Diameter Range	0.3 mm – 3.0 mm
Outer Diameter Range	2.0 mm – 40 mm (0.08 in – 1.57 in)
Spring Type	Compression
End Type	See variant options
Surface Finish	See variant options
Spring Rate	See variant options
Quantity per Pack	1 pcs / 2 pcs / 3 pcs / 5 pcs (see variant options)
Application	General mechanical assemblies, automation, DIY fabrication

❓ Frequently Asked Questions

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

Measure the bore (inner diameter of the housing) and the shaft or guide rod your spring will sit on. The spring outer diameter should be slightly smaller than the bore, and the inner diameter (outer diameter minus twice the wire diameter) should be slightly larger than the guide rod. Select a wire diameter that provides the spring rate your load requires — thicker wire yields a stiffer spring.

What is the free length and how does it affect my design?

The free length is 300 mm — the uncompressed length of the spring. When installed, the spring is compressed to your working length, generating the desired force. Ensure your assembly has enough travel clearance so the spring is never compressed to solid height during normal operation.

Are these springs suitable for outdoor or high-humidity environments?

Spring steel provides good performance in typical indoor and light-industrial conditions. For outdoor or high-humidity environments, consider applying a corrosion-inhibiting coating or lubricant after installation, or contact us to confirm suitability for your specific conditions.

Can these compression springs handle high-cycle fatigue applications?

Spring steel compression springs are designed for repeated cyclic loading. For high-cycle fatigue applications (millions of cycles), ensure the spring is not operated beyond its recommended deflection range and that it is not compressed to solid height. Contact us to confirm specifications for demanding duty cycles.

How do I match this spring to a replacement in existing machinery?

Measure the free length (300 mm), outer diameter, and wire diameter of the original spring. Then select the matching variant from the options above. If the original spring has a specific spring rate or load rating marked on it, contact us to confirm the closest available match.

What quantity options are available and how do I select them?

Quantity options vary by diameter combination — some variants are available as 1 pc, while others come in packs of 2, 3, or 5 pcs. Select your required length, wire diameter, and outer diameter & quantity combination from the variant dropdowns above to see what is available for your size.

Is spring steel the same as stainless steel?

No. Spring steel is a high-carbon or alloy steel optimized for elastic properties and fatigue resistance, while stainless steel is alloyed primarily for corrosion resistance. Spring steel offers superior spring performance for most mechanical applications; stainless steel springs are preferred where corrosion resistance is the primary requirement. These springs are spring steel.

🛒 Select your Length, Wire Diameter, and Outer Diameter & Quantity 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

Haven't received the order yet! It's been over 19 days!

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Spring steel compression springs with a diameter of 2-35mm and a length of 300mm

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Description

Spring Steel Compression Springs — Precise 300mm Length, 2–35mm Diameter Range

✅ Key Features of These Spring Steel Compression Springs

📐 Technical Specifications — Compression Springs

❓ Frequently Asked Questions

Spring steel compression springs with a diameter of 2-35mm and a length of 300mm

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