5mm-120mm Compression spring OD:2mm - 6mm Coil Pressure Springs 304 steel 0.30mm

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5mm-120mm Compression spring OD:2mm - 6mm Coil Pressure Springs 304 steel 0.30mm

Name: 5mm-120mm Compression spring OD:2mm - 6mm Coil Pressure Springs 304 steel 0.30mm
Brand: HomeDIYer
Price: 8.51 USD
Availability: InStock

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By HomeDIYer®

Size:: 0.3 x 2mm (ID:1.4)

Any length: 5mm

Packaging (pcs): 10

Price:

$8.51 USD

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In stock (500 units), ready to be shipped

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Miniature Compression Springs in 304 Stainless Steel — Precision Coil Pressure Springs for Tight Spaces

When your project demands a reliable, corrosion-resistant compression spring in a compact form factor, finding the right wire diameter and free length combination can be a real bottleneck. Engineers, hobbyists, and small-batch manufacturers working on precision mechanisms, sensor assemblies, or miniature actuators need springs that hold consistent force across repeated cycles — without rust, fatigue, or dimensional drift.

These compression springs are wound from 0.30mm diameter 304 stainless steel wire, with an outer diameter (OD) range of 2mm to 6mm (approx. 0.08" to 0.24") and free lengths spanning 5mm to 120mm (approx. 0.20" to 4.72"). Each spring features a tightly wound coil body with ground or closed ends typical of this wire gauge, delivering consistent spring rate across the full compression range.

Typical use cases include miniature electronics enclosures requiring contact pressure, robotics finger joints and gripper return mechanisms, pen and stylus tip assemblies, medical device prototyping, and small-batch DIY automation fixtures where a compact coil pressure spring with predictable load characteristics is essential.

⚙️ Compatibility: Suitable for applications requiring an inner diameter (ID) clearance of approximately 1.4mm to 5.4mm. Verify bore and shaft dimensions against the selected OD variant before ordering. Packaging options of 5, 10, 50, and 100 pcs available to match prototype or production volume needs.

✅ Key Features of These Miniature Compression Springs

🔩304 Stainless Steel Construction — Austenitic 304 grade provides solid corrosion resistance in humid, mildly acidic, and outdoor environments, extending service life in demanding conditions.
📏Wide Size Matrix — Wire diameter 0.30mm, OD from 2mm to 6mm, free length from 5mm to 120mm; select the exact combination from the variant dropdowns to match your bore and stroke requirements.
🔄Consistent Spring Rate — Uniform coil pitch and wire cross-section across the production run ensures repeatable force-deflection behavior, critical for sensor contact and actuator return applications.
🧲Compact OD for Tight Bores — OD starting at 2mm (ID approx. 1.4mm) makes these coil pressure springs suitable for pen tips, micro-switches, and miniature valve seats where space is at a premium.
📦Flexible Pack Quantities — Available in packs of 5, 10, 50, or 100 pieces, allowing cost-effective prototyping or small-batch production runs without over-ordering.
⚡Broad Application Range — Used in robotics, electronics, medical device prototyping, precision DIY fixtures, and consumer product mechanisms requiring a reliable miniature compression spring.

📐 Technical Specifications — Miniature Compression Springs

Spring Type	Compression (Coil Pressure Spring)
Material	304 Stainless Steel
Wire Diameter	0.30 mm
Outer Diameter (OD)	2 mm – 6 mm (approx. 0.08" – 0.24")
Inner Diameter (ID)	Approx. 1.4 mm – 5.4 mm (OD minus 2× wire dia.)
Free Length	5 mm – 120 mm (approx. 0.20" – 4.72")
End Type	See variant options
Spring Rate	See variant options
Surface Finish	Natural (uncoated stainless)
Packaging	5 / 10 / 50 / 100 pcs per pack

❓ Frequently Asked Questions

How do I choose the right OD and length for my application?

Measure the bore (hole) your spring will sit inside — the spring OD should be 0.1mm to 0.3mm smaller than the bore for a sliding fit. For shaft-guided springs, the shaft OD should be 0.1mm to 0.3mm smaller than the spring ID. Select a free length roughly 20–30% longer than your required compressed length to stay within the elastic range. Use the Size and Length dropdowns above to find your combination.

What load can a 0.30mm wire compression spring handle?

With a 0.30mm wire diameter, these are light-duty miniature springs. Typical load capacity at maximum safe deflection is in the range of 0.05 N to 0.5 N depending on OD and free length — suitable for contact pressure, switch actuation, and pen tip return mechanisms. For heavier loads, a larger wire diameter is recommended. Exact spring rate varies by OD and length; contact us to confirm if load data is critical.

Are these springs corrosion-resistant for outdoor or humid environments?

Yes. 304 stainless steel offers good resistance to atmospheric corrosion, moisture, and mild chemical exposure. It is not recommended for prolonged immersion in chloride-rich environments (e.g., saltwater) or strong acids. For marine or highly corrosive applications, 316 stainless steel springs would be more appropriate.

What is the inner diameter (ID) of each size variant?

The ID is approximately equal to the OD minus twice the wire diameter (0.30mm × 2 = 0.60mm). For example: OD 2mm → ID ≈ 1.4mm; OD 3mm → ID ≈ 2.4mm; OD 4mm → ID ≈ 3.4mm; OD 5mm → ID ≈ 4.4mm; OD 6mm → ID ≈ 5.4mm. These values are reflected in the Size variant labels (e.g., "0.3 × 2mm (ID:1.4)").

Are these compatible with standard spring housings or plunger assemblies?

These springs are compatible with any housing or plunger assembly that matches the OD and ID clearances listed above. They are commonly used in pen mechanisms, micro-switch plungers, miniature valve seats, and robotics finger return assemblies. Always verify the bore diameter and shaft diameter against the selected variant's OD and ID before assembly.

Which pack size should I order for prototyping vs. production?

For initial prototyping and fit testing, the 5-pack or 10-pack options provide a cost-effective way to validate your design without committing to large quantities. Once your design is confirmed, the 50-pack or 100-pack options offer a lower per-unit cost suitable for small-batch production runs. Select your preferred pack size in the "Packaging (pcs)" dropdown above.

Can I use these springs in electronics or PCB assemblies?

Yes. The small OD range (2–6mm) and short length options (5–30mm) make these coil pressure springs well-suited for PCB test fixtures, battery contact springs, and SMT component hold-down applications. The uncoated 304 stainless surface is electrically conductive, which can be advantageous for contact-pressure electrical connections.

🛒 Select your Size (OD × wire dia.), Length, and Packaging quantity above, then add to cart.

5mm-120mm Compression spring OD:2mm - 6mm Coil Pressure Springs 304 steel 0.30mm

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Description

Miniature Compression Springs in 304 Stainless Steel — Precision Coil Pressure Springs for Tight Spaces

✅ Key Features of These Miniature Compression Springs

📐 Technical Specifications — Miniature Compression Springs

❓ Frequently Asked Questions

5mm-120mm Compression spring OD:2mm - 6mm Coil Pressure Springs 304 steel 0.30mm

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