5pcs Wire Dia.1.5mm-2.0mm OD 16mm-30mm Small Springs Compression Spring Steel

Select based on three key dimensions: outer diameter (OD) to fit your housing or bore, wire diameter for the load you need to support, and free length to match your travel requirement. Use the variant selectors above to filter by Wire Diameter, Outer Diameter, and Length. If you are replacing an existing spring, measure the original with calipers before ordering.

These springs are made from carbon spring steel wire. Carbon spring steel offers a good balance of tensile strength, elasticity, and fatigue resistance for general-purpose compression applications. It is not stainless steel, so prolonged exposure to moisture or corrosive environments may cause surface oxidation over time.

These springs are made from bare carbon spring steel without a protective coating. They are suitable for dry indoor environments. For applications involving moisture, chemicals, or outdoor exposure, consider using stainless steel springs instead. Light oiling can help slow surface oxidation in humid conditions.

Closed ends means the last coil is wound tightly against the adjacent coil, reducing the active coil count and providing a more stable base. Ground ends means the closed end coil is machined flat, giving the spring a perpendicular seating surface. This combination improves load alignment and reduces side-loading in guided spring applications.

Yes. These springs are widely used in DIY electronics enclosures, 3D-printed mechanisms, jigs, and fixtures. Select the OD that fits your spring pocket with a small clearance (typically 0.5–1 mm), and choose a free length that gives you the travel and preload you need. The 5-piece pack is ideal for prototyping multiple configurations.

Wire diameter directly affects spring stiffness (spring rate). A thicker wire diameter produces a stiffer spring with a higher load capacity for the same OD and length. The 1.5 mm wire is the lightest option, suitable for low-load return applications, while the 2.0 mm wire provides significantly more resistance and is better suited for moderate-load mechanical assemblies.

These springs are dimensionally consistent with common metric compression spring sizes used in general mechanical engineering. However, they are not certified to a specific DIN or ISO standard. If your application requires springs certified to DIN 2098 or a similar standard, please contact us to confirm suitability before ordering.