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When a loose mechanism, a rattling assembly, or a failed return spring brings your project to a halt, you need a compression spring that fits precisely and holds its load cycle after cycle. These 1.5mm wire diameter 304 stainless steel compression springs are designed for hobbyists, makers, and small-scale mechanical engineers who demand consistent spring force without corrosion concerns.
Each spring is wound from 1.5mm wire diameter 304-grade stainless steel, offering a balance of flexibility and tensile strength. Outer diameters span 16mm to 30mm (approximately 0.63 in to 1.18 in), with free lengths available from 10mm to 120mm (approximately 0.39 in to 4.72 in). Packaging options include 1, 2, 5, or 10 pieces per order to suit both prototyping and small production runs.
Typical applications include DIY mechanical assemblies requiring a small compression spring 16mm OD, electronics enclosure latches needing a 1.5mm wire spring for return force, and light industrial fixtures where a 304 stainless compression spring resists moisture and mild chemical exposure without surface treatment.
Wound from 304-grade stainless steel for reliable corrosion resistance in humid or mildly corrosive environments without additional coating.
Consistent 1.5mm wire cross-section delivers predictable spring rates and uniform coil spacing across all size variants.
Nine outer diameter options from 16mm to 30mm (0.63–1.18 in) let you match the spring to your bore or guide rod without custom fabrication.
Free lengths from 10mm to 120mm (0.39–4.72 in) cover a broad range of travel and deflection requirements in a single product family.
Order 1, 2, 5, or 10 pieces — ideal for prototyping single units or stocking small batches for recurring repairs and builds.
End coils are closed to provide a flat seating surface, ensuring stable load transfer and reducing lateral deflection under compression.
| Material | 304 Stainless Steel |
|---|---|
| Wire Diameter | 1.5mm (0.059 in) |
| Outer Diameter (OD) | 16mm – 30mm (0.63 in – 1.18 in) |
| Free Length | 10mm – 120mm (0.39 in – 4.72 in) |
| Spring Type | Compression |
| End Type | Closed ends |
| Finish | Natural stainless (no coating) |
| Spring Rate | See variant options |
| Max Load | See variant options |
| Packaging | 1 / 2 / 5 / 10 pcs per order |
Measure the bore or housing that will contain the spring. The spring's outer diameter should be slightly smaller than the bore (typically 0.5–1mm clearance) so it compresses freely without binding. For guide-rod applications, the inner diameter of the spring must clear the rod diameter — check the inner diameter by subtracting twice the wire diameter from the outer diameter (ID ≈ OD − 2 × wire diameter).
Free length is the uncompressed length of the spring. Choose a free length that is longer than your required working length by at least the amount of deflection you need. For example, if you need 20mm of travel and a 30mm working length, select a free length of at least 50mm. Available lengths range from 10mm to 120mm in this product family.
Yes. 304 stainless steel provides good resistance to oxidation, moisture, and mild chemical exposure, making these springs suitable for outdoor DIY fixtures, damp enclosures, and light-duty industrial environments. For highly aggressive chemical or saltwater environments, 316 stainless steel would offer superior resistance.
Spring rate and maximum load vary by outer diameter and free length combination. Because this product covers a wide matrix of sizes, specific rate values are not listed here. If you require precise spring rate data for engineering calculations, please contact us with your selected size (OD × free length) and we will provide the specification.
304 stainless steel retains adequate mechanical properties up to approximately 300°C (572°F) for intermittent use. For continuous high-temperature applications above this range, a high-temperature alloy spring would be more appropriate. For typical room-temperature and moderate-heat DIY applications, these springs perform reliably.
Pack sizes of 1, 2, 5, and 10 pieces are available depending on the size variant selected. For prototyping or single repairs, the 1- or 2-piece options let you test fit and function before committing to a larger quantity. For recurring builds or small production runs, the 5- or 10-piece packs offer better value per unit.
The size designation refers to wire diameter × outer diameter. For example, "1.5 x 16mm" means a 1.5mm wire wound to a 16mm outer diameter, while "1.5 x 30mm" uses the same wire wound to a 30mm outer diameter. A larger outer diameter generally results in a lower spring rate for the same free length, meaning it compresses more easily under the same load.
