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When a spring fails mid-project, the whole assembly stops. Whether you're repairing a gate latch, building a custom jig, or replacing a worn-out industrial component, finding the exact wire diameter and outer diameter combination matters. These 150mm compression springs are designed for engineers, makers, and tradespeople who need a reliable, corrosion-resistant spring in a precise size — without ordering a custom batch.
Each spring is wound from 304 stainless steel wire in diameters ranging from 0.3mm to 2mm (approximately 0.012" to 0.079"), with outer diameters spanning 3mm to 25mm (approximately 0.12" to 0.98"). The free length is 150mm (approximately 5.91"). Available in 1PCS or 2PCS quantities to suit both single-repair and backup-stock needs.
Typical use cases include mechanical assemblies requiring consistent return force, DIY tool and fixture builds needing compact compression elements, and replacement of corroded or fatigued springs in outdoor or humid environments where 304 stainless steel compression springs outperform carbon steel alternatives.
Wound from 304-grade stainless steel wire for solid corrosion resistance in humid, outdoor, and light chemical environments — outlasting uncoated carbon steel springs in comparable conditions.
Wire diameters from 0.3mm to 2mm paired with outer diameters from 3mm to 25mm give you precise control over spring rate and fit — select the exact combination from the variant options.
A consistent 150mm (5.91") free length across all variants makes these springs easy to spec into assemblies where travel distance and compressed height are critical design parameters.
Springs in this wire and outer diameter range are typically wound with closed ends for stable seating on flat surfaces, reducing lateral deflection under load.
Order 1PCS for a single repair or 2PCS to keep a spare on hand. Pricing scales with quantity, so stocking a backup costs less per unit.
Used in gate latches, tool fixtures, valve assemblies, electronics enclosures, model engineering, and general mechanical repair — wherever a compact, corrosion-resistant compression spring is needed.
| Material | 304 Stainless Steel |
|---|---|
| Free Length | 150mm (approx. 5.91") |
| Wire Diameter Range | 0.3mm – 2mm (approx. 0.012" – 0.079") |
| Outer Diameter Range | 3mm – 25mm (approx. 0.12" – 0.98") |
| Spring Type | Compression |
| End Type | See variant options |
| Spring Rate | See variant options |
| Surface Finish | Natural stainless (no coating) |
| Available Quantities | 1PCS, 2PCS |
| Coil Direction | Right-hand wound (typical) |
Start with the bore or housing diameter your spring must fit inside — the outer diameter of the spring should be slightly smaller than the bore. Then select a wire diameter based on the load you need: thicker wire (e.g., 1.5mm–2mm) handles heavier loads, while thinner wire (e.g., 0.3mm–0.6mm) suits lighter-duty or precision applications. Use the variant selector above to pick your exact Wire Dia × Outer Dia combination.
Spring rate depends on wire diameter, outer diameter, number of active coils, and material modulus. Because this listing covers a wide range of wire and outer diameter combinations, the spring rate varies by variant. If you need a specific spring rate (N/mm or lbf/in), please contact us with your wire diameter and outer diameter selection so we can provide guidance.
Yes. 304 stainless steel offers solid corrosion resistance against moisture, rain, and mild chemical exposure, making these compression springs well-suited for outdoor gate hardware, marine-adjacent applications, and humid workshop environments. For highly aggressive chemical or saltwater immersion environments, 316 stainless steel would be a stronger choice.
Both options ship the same spring in the same wire and outer diameter. Selecting 2PCS gives you two springs of the same specification — useful if you need a matched pair for a symmetric assembly, or simply want a spare on hand. The per-unit cost is lower on the 2PCS option.
These are general-purpose compression springs and can serve as replacements in many applications, provided the free length (150mm), wire diameter, and outer diameter match your original part. Always verify the compressed height and spring rate of your original spring before ordering a replacement.
Measure three dimensions: (1) Free length — the uncompressed length of the spring, which should be 150mm for this listing; (2) Outer diameter — measure across the widest point of the coil; (3) Wire diameter — measure the thickness of the wire itself using calipers. Match these to the variant options in this listing. If your spring is slightly compressed in its resting position, measure it removed from the assembly.
Yes — HomeDIYer carries compression springs in multiple free lengths. Search our store for your required length, or contact us with your specifications and we can point you to the right listing.
