Compression Springs Wire Dia 0.8mm OD 12mm 304 Stainless Steel Vibration Damping

Measure the distance between the two surfaces the spring will sit between when the assembly is at rest (uncompressed). Add 20–30% to that measurement to allow for working compression travel. Select the variant whose free length matches that calculated value. If you are between sizes, choose the longer option and compress it to your required working length.

Spring rate varies with free length — shorter springs are stiffer, longer springs are softer. Because this product covers 19 different lengths, the spring rate differs per variant. If you need a specific rate (N/mm or lbf/in), please contact us with your length and we can provide an estimate or direct you to the appropriate variant.

Yes. 304 stainless steel provides solid resistance to atmospheric corrosion, fresh water, and mild chemical exposure. It is not recommended for prolonged immersion in chlorinated water or salt spray without additional protection. For marine or highly corrosive environments, consider 316 stainless steel springs instead.

The outer diameter is 12mm (0.472 in) and the inner diameter is approximately 10.4mm (0.41 in). Your guide rod should be smaller than 10.4mm to allow free movement, and your spring pocket bore should be at least 12mm to accept the spring. Always verify clearances in your CAD model or with a caliper before ordering in bulk.

Yes. The 0.8mm wire / 12mm OD size is a common fit for many bed-leveling spring pockets on FDM printers. The 10mm–25mm length variants are most frequently used for this purpose. Verify your printer's spring seat diameter and required free length before selecting a variant.

If you are prototyping or need spares for a single machine, 10–20 pieces is typically sufficient. For small production runs, assembly kits, or workshop stock, 50–100 pieces offers a lower per-unit cost and ensures you have replacements on hand. The per-piece price decreases as quantity increases, so ordering more upfront is cost-effective if you anticipate ongoing use.

Open-end springs (like these) have coils that continue at the same pitch to the very end, giving a slightly uneven seating surface. Closed-end springs have the last coil wound tight against the adjacent coil, providing a flat seating surface for more stable load transfer. For most DIY and light-industrial applications, open-end springs perform well. If you need precise perpendicular load transfer, look for closed and ground end variants.