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When a project demands consistent spring force without the risk of corrosion, finding the right wire diameter and coil width in a single source can be a real challenge. Whether you are a mechanical engineer, a hobbyist building custom mechanisms, or a maintenance technician replacing worn components, these stainless steel compression springs deliver repeatable performance across a wide range of wire gauges and coil widths.
Each spring is wound from stainless steel wire with diameters ranging from 0.3 mm to 2.5 mm (approximately 0.012 in to 0.098 in) and coil widths from 3 mm to 35 mm (approximately 0.12 in to 1.38 in). The fixed free length is 305 mm (approximately 12.0 in), giving you a long working stroke that can be cut or compressed to suit your application. Pack sizes of 1, 2, 3, or 5 pieces let you order exactly what you need.
Typical use cases include custom jig and fixture design requiring precise return force, small-appliance and consumer-electronics repair needing corrosion-resistant replacement springs, and light industrial automation where consistent spring rate and long service life are critical. Long-tail applications such as "stainless compression spring 1mm wire 305mm length" and "small diameter coil spring for DIY mechanism" are well served by this range.
| Material | Stainless Steel |
|---|---|
| Wire Diameter Range | 0.3 mm – 2.5 mm (0.012 in – 0.098 in) |
| Coil Width (OD) Range | 3 mm – 35 mm (0.12 in – 1.38 in) |
| Free Length | 305 mm (12.0 in) |
| Spring Type | Compression |
| Winding Direction | See variant options |
| Spring Rate | See variant options |
| End Type | See variant options |
| Surface Finish | Natural stainless (no coating) |
| Pack Size | 1 / 2 / 3 / 5 pieces |
| Weight (per piece) | See variant options |
Wire diameter directly affects the spring rate and load capacity. Thinner wires (0.3–0.8 mm) suit light-duty applications such as electronics and small appliances, while thicker wires (1.0–2.5 mm) are better for mechanical jigs, fixtures, and light industrial use. Match the wire diameter to the force range your design requires, and verify the outer diameter fits your housing bore.
The coil width listed in the variant name (e.g., "1.0*8*305 mm") refers to the outer diameter of the coil. For example, a "1.0*8*305 mm" spring has a wire diameter of 1.0 mm and an outer diameter of approximately 8 mm. The inner diameter is approximately OD minus twice the wire diameter. Please check the variant name carefully before ordering.
Yes. These springs are made from stainless steel, which provides good resistance to oxidation and corrosion in humid, wet, and mildly chemical environments. They are suitable for outdoor or damp indoor applications where carbon steel springs would rust. For highly aggressive chemical environments, please contact us to confirm suitability.
The 305 mm free length can be cut to a shorter working length using a suitable cutting tool such as an angle grinder or spring cutter. After cutting, lightly grind the end coils flat to maintain stable seating. Note that cutting will change the spring rate and load characteristics proportionally.
If you need a single spring for a repair or prototype, choose the pack of 1. For small production runs or to keep a spare on hand, packs of 2 or 3 are economical. The pack of 5 offers the best per-unit value for batch production or maintenance stock. Select your pack size using the "Pack Size" option above.
Compatibility depends on the outer diameter and wire diameter of the specific variant you select. Check that the outer diameter of the spring is smaller than your housing bore, and that the inner diameter is larger than your guide rod (if used). Refer to the variant name format "wire dia × OD × length" to confirm dimensions before purchasing.
A larger wire diameter produces a stiffer spring with a higher spring rate and greater load capacity for the same coil diameter and length. A smaller wire diameter yields a softer spring with lower load capacity. Choose based on the force your application requires: light return forces suit 0.3–0.6 mm wire, moderate forces suit 0.7–1.2 mm wire, and heavier loads suit 1.5–2.5 mm wire.
