Compression Spring 0.5mm Wire Dia 6-12mm Dia A2 Stainless Steel 5-50mm Length

Match the outer diameter (OD) to your bore or spring pocket — the spring OD should be slightly smaller than the bore ID to allow free movement. Then select a free length that gives you the travel and preload you need. For this range, ODs run 6–12mm and free lengths 5–50mm. If you are unsure, order a small pack of two or three candidate sizes to test fit before committing to a larger quantity.

A 0.5mm wire diameter produces a light spring force suitable for low-load applications such as switch returns, pen clips, and small latches. Exact spring rate depends on the number of active coils and the outer diameter of the specific variant. For precise rate values, contact us with your variant selection and we can provide further guidance.

Yes. A2 (304) stainless steel offers solid resistance to atmospheric corrosion, moisture, and mild chemical exposure. It is suitable for indoor humid environments, light outdoor use, and applications where mild cleaning agents may be present. For highly aggressive chemical or marine salt environments, A4 (316) stainless would be a stronger choice.

Closed ends means the last coil is wound tight against the adjacent coil, and ground means the end face is machined flat. This gives the spring a stable, square bearing surface so it seats evenly against a flat pocket or plunger face. Without ground ends, a spring can tilt under load, causing uneven force distribution and premature fatigue.

Yes. The 6–8mm OD variants with short free lengths (5–15mm) are commonly used in battery contacts, push-button switches, and connector retention mechanisms on PCBs and small electronics enclosures. The stainless steel material is non-magnetic and does not introduce significant interference in most low-frequency electronic applications.

For prototyping or design validation, the 10 or 20-piece packs let you test fit and function without committing to large quantities. Once your design is confirmed, the 50, 100, or 200-piece packs offer a lower per-unit cost and reduce reorder frequency for small-batch or ongoing production runs.

Each listing is for a single size combination — one specific Wire Dia × Outer Dia × Length variant, in your chosen pack quantity. Select your exact size from the variant dropdowns above. Mixed-size assortment packs are not included in this listing.