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Finding a compression spring that holds its shape under repeated cycling is a constant challenge for engineers, hobbyists, and repair technicians alike. These 0.8mm wire compression springs are wound from 304 stainless steel, delivering consistent return force across a wide range of lengths and outer diameters — making them a dependable choice for anyone who needs a compact, corrosion-resistant pressure spring.
Each spring is formed from 0.8mm wire diameter 304 stainless steel, with outer diameters ranging from 6mm to 14mm (approximately 0.24" to 0.55") and free lengths spanning 10mm to 305mm (approximately 0.39" to 12.0"). The coil geometry provides a linear spring rate suited to light-to-medium load applications.
Typical use cases include electronic device button mechanisms requiring a compact return spring, small appliance and tool assembly where a stainless steel compression spring resists moisture, and DIY mechanical projects such as valve assemblies, pen mechanisms, and jig fixtures that demand a precise pressure spring in a small form factor.
Wound from 304-grade stainless steel wire, these compression springs resist oxidation and surface corrosion in humid, wet, and mildly acidic environments — extending service life compared to carbon steel alternatives.
Available in outer diameters from 6mm to 14mm and free lengths from 10mm to 305mm, covering a broad range of mechanical design requirements without custom tooling.
The 0.8mm wire diameter produces a linear load-deflection curve across the usable travel range, supporting repeatable force output in precision assemblies and automated mechanisms.
Standard coil geometry with closed ends provides stable seating on flat surfaces, reducing lateral buckling tendency and simplifying installation in spring pockets and guides.
Available in 1, 2, 5, 10, and 20-piece packs so you can order exactly what your project needs — from single-unit prototyping to small-batch production runs.
Suited for electronics, small appliances, automotive accessories, plumbing fixtures, DIY jigs, and any mechanical assembly requiring a compact, corrosion-resistant pressure spring.
| Material | 304 Stainless Steel |
|---|---|
| Wire Diameter | 0.8mm (0.031") |
| Outer Diameter Range | 6mm – 14mm (0.24" – 0.55") |
| Free Length Range | 10mm – 305mm (0.39" – 12.0") |
| Spring Type | Compression (Pressure) |
| End Type | See variant options |
| Spring Rate | See variant options |
| Surface Finish | Bright / Natural Stainless |
| Pack Quantity | 1 / 2 / 5 / 10 / 20 PCS (select above) |
| Corrosion Resistance | Good (304 SS, suitable for general outdoor and humid environments) |
Measure the bore or housing inner diameter where the spring will seat — your spring's outer diameter should be 0.5–1mm smaller than the bore for a sliding fit. For free length, select a spring that is longer than your required compressed length plus your desired travel (stroke). Use the Wire Dia × Outer Dia and Length selectors above to match your design envelope.
Load capacity depends on the outer diameter, free length, and number of active coils — all of which vary by variant. As a general guide, 0.8mm wire springs in this size range are suited to light-to-medium loads, typically in the range of a few hundred grams to a few kilograms of force at working deflection. If you need exact spring rate data for a specific variant, please contact us to confirm.
Yes. 304 stainless steel provides good resistance to atmospheric corrosion, fresh water, and mild chemical exposure. It is suitable for humid indoor environments, light outdoor use, and applications involving occasional water contact. For highly aggressive environments (saltwater immersion, strong acids), consider 316 stainless steel instead.
The "Wire Dia × Outer Dia" option shows the wire diameter (always 0.8mm) paired with the spring's outer diameter. A 0.8*6mm spring has a 6mm outer diameter — compact and suited for narrow bores. A 0.8*14mm spring has a 14mm outer diameter, providing more lateral stability and typically a higher spring rate for the same free length. Choose based on your housing bore size and required load.
Yes. The smaller outer diameter variants (6mm–8mm) and shorter lengths (10mm–30mm) are well-suited for pen mechanisms, push-button switches, keyboard stabilizers, and similar consumer electronics applications where a compact, reliable return spring is needed.
Ordering 5, 10, or 20 pieces reduces the per-unit cost and ensures you have spares on hand for prototyping iterations, batch builds, or future repairs. Springs in mechanical assemblies can fatigue over time, so having replacements ready minimizes downtime.
Start with a 1 or 2-piece pack of your target variant to test fit, travel, and load feel in your assembly. Once confirmed, you can order larger quantities. If you need a specific spring rate or load specification confirmed before ordering, contact us with your application details.
