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When a standard spring fails mid-project — snapping under load, corroding in a damp enclosure, or simply arriving in the wrong length — the entire assembly stalls. Engineers, makers, and maintenance technicians who need a reliable, dimensionally consistent compression spring in small wire gauges know how hard it is to source the right size without ordering a custom batch. These A2 stainless steel compression springs are stocked across a wide size matrix so you can match your exact application without compromise.
Each spring is wound from 0.8mm (approximately 0.031 in) wire diameter, with an outer diameter (OD) ranging from 12mm to 14mm (approximately 0.47–0.55 in) and a free length spanning 10mm to 305mm (approximately 0.39–12.0 in). The body is manufactured from A2 (304-grade equivalent) austenitic stainless steel, offering a smooth, bright finish with closed and ground ends on longer variants for stable seating.
Typical use cases include electronic enclosure latches requiring a light return force, valve and actuator assemblies in food-processing or marine environments where corrosion resistance is critical, precision jig and fixture clamping mechanisms, and DIY automation projects where a compact 12–14mm OD spring fits inside standard tubing or bores. The wide length range — from a 10mm micro-spring to a 305mm full-length rod — makes this listing a single-source solution for prototyping and production runs alike.
Wound from A2 (304-equivalent) austenitic stainless wire, these springs resist oxidation, mild acids, and humidity — suitable for indoor, outdoor, and light marine environments without surface treatment.
Consistent 0.8mm wire gauge across all variants ensures predictable spring rate and deflection behavior, critical for repeatable performance in automated assemblies and precision fixtures.
From compact 10mm return springs to 305mm full-stroke compression springs, the full length matrix covers prototyping and production needs without custom tooling or minimum order quantities.
Three OD families (12mm, 13mm, 14mm) let you match standard bore sizes and tubing IDs precisely, reducing the need for adapters or shimming in your assembly.
Available in packs of 1, 5, 10, 20, 50, 80, 100, 200, and 500 pieces — order a sample pack for prototyping or a bulk quantity for production runs, all from the same SKU family.
Springs feature closed (and ground on longer lengths) ends, providing flat, stable contact surfaces that reduce lateral buckling and improve load distribution in spring seats and retainers.
| Wire Diameter | 0.8mm (approx. 0.031 in) |
|---|---|
| Outer Diameter (OD) | 12mm / 13mm / 14mm (approx. 0.47–0.55 in) |
| Free Length Range | 10mm – 305mm (approx. 0.39–12.0 in) |
| Material | A2 Stainless Steel (304-grade equivalent) |
| Spring Type | Compression (helical coil) |
| End Type | Closed ends (ground on longer lengths) |
| Finish | Bright / natural stainless |
| Coil Direction | Right-hand wound (standard) |
| Spring Rate | See variant options |
| Max Load Capacity | See variant options |
| Operating Temperature | Typically –20°C to +200°C (–4°F to +392°F) |
| Pack Size Options | 1 / 5 / 10 / 20 / 50 / 80 / 100 / 200 / 500 pcs |
Measure the distance between your spring seats at maximum compression (solid height) and at free (unloaded) position. The free length of the spring should be equal to or slightly longer than your unloaded gap. For a 10–305mm range, select the free length closest to your required travel plus solid height. If in doubt, order a small sample pack of two or three lengths to test fit before committing to bulk.
The outer diameter (OD) determines whether the spring fits inside a bore or around a guide rod. A 12mm OD spring fits inside a bore of approximately 12.5mm or larger; a 14mm OD spring requires a bore of approximately 14.5mm or larger. Choose the OD that matches your housing bore with a small clearance (typically 0.3–0.5mm) to prevent binding while maintaining lateral stability.
With a 0.8mm wire diameter, these are light-duty to medium-duty springs suited for return mechanisms, latches, valve actuators, and clamping fixtures where loads are typically in the range of a few Newtons to tens of Newtons depending on length and deflection. They are not intended for heavy structural or high-cycle fatigue applications. Contact us to confirm spring rate and load data for your specific variant before use in safety-critical assemblies.
A2 stainless steel (equivalent to AISI 304) provides excellent resistance to atmospheric corrosion, fresh water, mild acids, and food-contact environments. It is suitable for indoor, outdoor, and light marine use. For highly chlorinated or salt-spray environments, A4 (316-grade) stainless would be more appropriate. These springs do not require additional coating or plating to maintain corrosion resistance under normal conditions.
A2 stainless steel is widely used in food-contact and light medical applications due to its corrosion resistance and non-reactive surface. However, suitability for specific regulatory environments (FDA, EU food contact, medical device standards) depends on your application requirements. We recommend verifying compliance with your relevant standards before use in regulated industries.
For prototyping and fit testing, a pack of 5 or 10 pieces is ideal — it gives you enough to test multiple assemblies without over-committing. For small production runs, packs of 50–100 offer a good balance of unit cost and stock. For high-volume production or maintenance stock, packs of 200 or 500 provide the best per-unit value. All pack sizes ship from the same inventory, so you can reorder any quantity as needed.
Use a digital caliper to measure: (1) wire diameter — measure the wire cross-section; (2) outer diameter — measure across the outside of the coils; (3) free length — measure the spring at rest, uncompressed. Compare these three values to the variant name format shown in this listing (Wire Dia × OD × Free Length in mm). If your existing spring is imperial, convert: 1 inch = 25.4mm.
