Compression Spring A2 304 Stainless Steel Wire Dia 0.7mm - 0.8mm Various Length

Match three key dimensions: outer diameter (OD) to your spring pocket or bore, wire diameter to the load requirement, and free length to the travel distance plus any preload. For light-duty return mechanisms, 0.7 mm wire is typically sufficient; for slightly higher loads, choose 0.8 mm. Use the Size variant selector to pick the exact wire × OD × length combination.

A thicker wire diameter (0.8 mm) produces a stiffer spring with a higher spring rate and greater load capacity compared to 0.7 mm wire at the same OD and length. If your application requires more force to compress the spring by the same distance, select 0.8 mm wire. For delicate mechanisms needing light, consistent pressure, 0.7 mm wire is the better choice.

Yes. A2 (304) stainless steel offers good resistance to atmospheric corrosion, moisture, and mild chemical exposure. These springs are suitable for outdoor-adjacent applications, light marine environments, and humid workshops. For highly aggressive salt-spray or chemical environments, A4 (316) stainless steel would be a stronger choice.

These springs are well-suited for pen and stylus click mechanisms, 3D printer extruder and bed-levelling assemblies, small valve and plunger return systems, electronics enclosure latches, precision instrument components, small appliance repairs, and robotics projects requiring compact, corrosion-resistant springs with wire diameters of 0.7–0.8 mm.

Use digital calipers to measure: (1) wire diameter — the thickness of the wire itself; (2) outer diameter — the widest point across the coil; (3) free length — the uncompressed total length. Match all three to the Size variant listed as Wire Dia × OD × Length (e.g., 0.8×10×30mm means 0.8 mm wire, 10 mm OD, 30 mm free length).

The Amount(pcs) variant indicates how many springs are included per order. For a single repair or prototype, 1 or 2 pcs is sufficient. For small production runs, testing multiple configurations, or keeping spares on hand, 5 or 10 pcs offers better value per unit. Select the quantity in the Amount(pcs) variant before adding to cart.

Yes. The fine wire diameters (0.7–0.8 mm) and wide OD range (4–14 mm) make these springs popular for 3D printer bed-levelling springs, extruder tension mechanisms, and CNC limit-switch return springs. Verify the OD fits your spring seat and the free length provides adequate travel before ordering.