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When a standard spring fails mid-project — snapping under load, rusting in a damp environment, or simply not fitting the assembly — the entire mechanism suffers. Engineers, machinists, and hands-on DIYers who need a reliable, precisely sized compression spring will find this range indispensable. Designed for demanding environments where dimensional accuracy and material integrity are non-negotiable.
Each spring is formed from 304-grade stainless steel wire with a 2mm wire diameter. Outside diameters span 12mm to 30mm (~0.47" to 1.18"), and free lengths range from 10mm to 200mm (~0.39" to 7.87"). The coil pitch and end configuration are optimized for axial compression loads across the full size range.
Typical use cases include mechanical assemblies requiring consistent return force, valve and actuator mechanisms needing corrosion-resistant compression springs, and DIY fabrication projects such as custom jigs, fixtures, and spring-loaded clamps where stainless steel compression springs with precise OD control are essential.
| Wire Diameter | 2.0 mm (0.079") |
|---|---|
| Outside Diameter (OD) | 12 mm – 30 mm (0.47" – 1.18") — See variant options |
| Free Length | 10 mm – 200 mm (0.39" – 7.87") — See variant options |
| Material | 304 Stainless Steel |
| Spring Type | Compression (Pressure) |
| End Type | See variant options |
| Spring Rate | See variant options |
| Surface Finish | Natural stainless steel (no coating) |
| Quantity per Order | 1 piece (per variant as listed) |
Measure the bore or housing your spring will sit inside, then select an OD that provides a small clearance — typically 0.5mm to 1mm smaller than the bore ID. If the spring rides on a guide rod, the rod OD should be at least 1mm smaller than the spring's inner diameter (ID = OD minus 2× wire diameter, so ID = OD − 4mm for this 2mm wire series).
Load capacity depends on the specific OD and free length combination. Larger OD and shorter free length generally yield a stiffer spring with higher load capacity. For precise spring rate and maximum load values for your chosen variant, contact us to confirm — or use standard spring rate formulas with the published dimensions.
Yes. 304 stainless steel offers solid resistance to atmospheric corrosion, rain, and humidity. It performs well in most outdoor settings and light industrial environments. For highly aggressive chemical or saltwater immersion applications, 316 stainless steel would be a more appropriate choice.
These springs are designed to standard coil spring geometry and will fit housings sized to match the selected OD. Always verify the housing bore diameter, guide rod diameter (if used), and required free length against your chosen variant before ordering to ensure proper fit and function.
The free length should be longer than your required working length by the amount of compression travel needed. For example, if your assembly compresses the spring by 20mm and you need 10mm of working length at full compression, select a free length of at least 30mm. Add a safety margin to avoid coil bind.
304 stainless steel retains adequate mechanical properties up to approximately 300°C (572°F) for intermittent use. For continuous high-temperature service above this range, a high-temperature alloy spring would be more appropriate. For standard ambient and moderately elevated temperatures, these springs perform reliably.
Wire diameter refers to the thickness of the steel wire used to coil the spring (2.0mm in this product). Outside diameter (OD) is the total outer width of the coiled spring body, ranging from 12mm to 30mm across the available variants. The inner diameter (ID) equals OD minus twice the wire diameter (OD − 4mm for this series).
