Steel Compression Springs 300mm | Wire Dia 0.3–1mm Helical Coil

Steel Compression Springs – 300mm Long, Wire Diameter 0.3–1mm

Upgrade your mechanical projects with these precision-engineered steel compression springs. Available in seven wire diameters (0.3, 0.4, 0.5, 0.6, 0.8, 0.9, and 1.0mm) and a generous 300mm length, these helical coil springs deliver consistent, reliable force for a wide range of DIY, industrial, and hobby applications.

Key Features

• High-Grade Spring Steel: Manufactured from high-hardness spring steel for exceptional durability and fatigue resistance.
• Multiple Wire Diameters: Choose from 0.3, 0.4, 0.5, 0.6, 0.8, 0.9, or 1.0mm wire diameters to match your exact requirements.
• Consistent Performance: Even coil spacing ensures stable, predictable compression force every time.
• Smooth Surface Finish: No sand holes or surface defects — clean, smooth finish for precise mechanical fits.
• Long 300mm Length: Easy to cut to custom lengths, making these springs highly versatile for varied project needs.
• Good Elasticity: Excellent elastic return keeps mechanisms operating smoothly over repeated cycles.
• Customizable: Available in outer diameters ranging from 2mm to 20mm — specify your size using the wire diameter × outer diameter × length format (e.g. 0.6 × 12 × 300mm).

Specifications

Perfect For

• DIY electronics and mechanical assemblies
• RC models, robotics, and hobby projects
• Industrial machinery and equipment repair
• Automotive and hardware applications
• Custom fabrication and engineering prototypes

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Frequently Asked Questions

Q: What wire diameters are available for these compression springs?

A: These compression springs are available in seven wire diameters: 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, 0.9mm, and 1.0mm. Each variant comes in a 300mm long coil that can be cut to your desired custom length.

Q: What material are these helical coil compression springs made from?

A: These springs are crafted from high-hardness spring steel, which provides excellent elasticity, fatigue resistance, and long-lasting durability for both light-duty hobby and heavier mechanical applications.

Q: Can I get a custom outer diameter for these springs?

A: Yes! These springs are customizable. The outer diameter ranges from 2mm to 20mm. Simply specify your size using the format: wire diameter × outer diameter × length (e.g. 0.6 × 12 × 300mm) when placing your order.

Q: Are these springs suitable for DIY and hobby projects?

A: Absolutely. Their smooth surface finish, even coil spacing, and wide range of sizes make these steel compression springs ideal for DIY electronics, robotics, RC models, automotive repair, and general mechanical assembly projects.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.