304 Stainles Steel Compression Spring 0.6mm 0.7mm 0.8mm Pressure Small Spring

Start with the bore or seat diameter in your assembly — the spring OD should be slightly smaller than the bore so it can compress freely without binding. Then select the wire diameter based on the load you need: a thicker wire (0.8 mm) produces a stiffer spring, while a thinner wire (0.6 mm) gives a softer response. Use the variant selector above to pick the Wire Dia × OD × Length combination that matches your housing dimensions.

Spring rate (stiffness) depends on wire diameter, OD, and the number of active coils. For these miniature springs, a thicker wire and smaller OD generally produce a higher spring rate. Exact spring rate values vary by size; if your application requires a specific rate, contact us to confirm before ordering.

304 stainless steel offers good resistance to oxidation and mild atmospheric moisture, making it suitable for indoor electronics, light-duty outdoor fixtures, and humid workshop environments. For highly corrosive environments (saltwater, strong acids, or chlorine exposure), consider 316 stainless steel instead. These springs are not coated, so the natural stainless surface provides the corrosion protection.

Yes. The non-magnetic properties of 304 stainless steel make these springs a practical choice for electronics enclosures, sensor housings, and precision instruments where magnetic interference must be minimized. The small wire diameters (0.6–0.8 mm) are well-matched to compact PCB-mounted or instrument-grade mechanisms.

Free length is the spring's natural, unloaded length as listed in the variant name (e.g., 20 mm). When compressed, the spring shortens until it reaches its solid height (all coils touching). Your assembly must provide enough travel between the free length and the solid height to achieve the desired force. If you need the solid height for a specific variant, contact us to confirm.

Each variant includes 10 pieces per pack. If you need larger quantities for production or bulk prototyping, simply add multiple packs to your cart or contact us to discuss volume pricing options.

Measure the inner bore or seat diameter of your assembly and compare it to the spring OD listed in the variant name. Allow a small clearance (typically 0.2–0.5 mm) between the OD and the bore wall. Also confirm the free length is shorter than your available cavity depth so the spring can seat properly without pre-loading beyond its elastic range.