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When a loose mechanism rattles, a valve fails to seat, or a small assembly loses its return force, the culprit is almost always a worn or incorrectly sized compression spring. Engineers, hobbyists, watchmakers, and repair technicians who need a reliable, corrosion-resistant solution turn to brass compression springs — a material that combines dimensional stability with natural resistance to moisture and mild chemicals.
Each pack contains 10 pieces of brass compression springs. Wire diameters span 0.2 mm (approx. 0.008 in) to 1.2 mm (approx. 0.047 in), with outer diameters ranging from 1 mm to 13.8 mm (approx. 0.04 in to 0.54 in) and free lengths from 4.5 mm to 40 mm (approx. 0.18 in to 1.57 in) depending on the variant selected. The springs are wound from brass wire and feature open, ground-flat ends suited to standard spring seats.
Typical use cases include small appliance repair requiring miniature compression spring replacement, precision instrument assembly where a non-magnetic spring material is required, and electronics or PCB fixture work where a conductive yet corrosion-resistant return spring is needed for contact pins or test probes.
| Material | Brass |
|---|---|
| Wire Diameter Range | 0.2 mm – 1.2 mm (approx. 0.008 in – 0.047 in) |
| Outer Diameter Range | 1 mm – 13.8 mm (approx. 0.04 in – 0.54 in) |
| Free Length Range | 4.5 mm – 40 mm (approx. 0.18 in – 1.57 in) |
| End Type | Open ends (ground-flat style) |
| Spring Type | Compression (push / pressure) |
| Finish | Natural brass |
| Quantity per Pack | 10 pieces |
| Spring Rate | See variant options |
| Max Load | See variant options |
Start with the bore or seat diameter your spring must fit into — the outer diameter of the spring should be slightly smaller than the bore. Then select a wire diameter that provides the stiffness you need: thicker wire (e.g., 1.0–1.2 mm) gives a stiffer spring, while thinner wire (e.g., 0.2–0.3 mm) gives a softer, more compliant spring. Use the variant selector above to match Wire Diameter, Outer Diameter, and Length to your assembly.
These are miniature precision springs intended for light-duty applications such as contact pins, small valves, latches, and instrument mechanisms. They are not designed for heavy structural or high-load industrial use. For load-critical applications, please verify the spring rate and maximum load against your design requirements before ordering.
Brass does not rust (rust is specific to iron-based metals). It can develop a patina (surface oxidation) over time when exposed to air and moisture, but this does not significantly affect mechanical performance in most applications. For highly corrosive environments, consider whether a stainless steel spring might be more appropriate.
Yes. Brass is electrically conductive and non-magnetic, making these springs well-suited for PCB contact pins, spring-loaded test probes, and electronic fixture applications where a conductive return element is needed without introducing magnetic interference.
For a given wire diameter, a larger outer diameter results in a lower spring rate (softer spring) and a smaller outer diameter results in a higher spring rate (stiffer spring). Choose the outer diameter that fits your housing bore and delivers the deflection and force characteristics your application requires.
Yes, these are commonly used as replacement springs in small appliances, mechanical pencils, clickers, valves, and hand tools. Measure the wire diameter, outer diameter, and free length of the original spring, then select the matching variant from the options above.
Larger outer diameters and longer free lengths require more brass wire per spring, which increases the material cost per pack. Variants with larger OD (e.g., 10 mm and above) or longer lengths (e.g., 35–40 mm) are priced slightly higher to reflect this difference.
