Compression Springs Wire Dia 0.4mm OD 6mm 304 Stainless Steel Vibration Damping

Measure the distance between your spring seats at maximum compression and at rest. The free length should be longer than the at-rest gap so the spring is always under slight preload. For vibration-damping applications, a free length 20–30% longer than the installed height is a common starting point. Select from the 15 available lengths (5 mm to 100 mm) to find the closest match.

With a 0.4 mm wire diameter and 6 mm OD, these springs are designed for light-to-medium loads — typically suited for sensor contacts, probe tips, button return mechanisms, and vibration isolation mounts rather than heavy structural applications. Exact spring rate and maximum load vary by free length; contact us to confirm if you have a specific load requirement.

Yes. 304 stainless steel provides solid resistance to atmospheric corrosion, moisture, and mild chemical exposure. It is suitable for indoor automation, outdoor enclosures, and light marine environments. For highly aggressive chemical or saltwater immersion applications, 316 stainless steel would be a stronger choice.

The outer diameter is 6 mm, so the spring pocket or bore should be at least 6.2–6.5 mm to allow free movement without binding. If the spring seats on a pin or mandrel, the inner diameter (ID) is approximately 5.2 mm (OD minus 2× wire diameter), so the pin should be no larger than 4.8–5.0 mm for a reliable fit.

For prototyping and testing, the 5 Pcs or 10 Pcs options let you validate fit and spring rate without committing to large quantities. Once your design is confirmed, the 50 Pcs, 80 Pcs, or 100 Pcs packs offer better per-unit value for production batches. All pack sizes ship from the same inventory, so you can reorder the exact same spec.

Yes — these are a popular choice for 3D printer carriage mounts, bed-leveling spring seats, and CNC router spindle isolation. The 6 mm OD fits many standard M3 and M4 spring-mount designs. Choose a free length that gives 1–3 mm of preload compression in your installed position for consistent damping performance.

Shorter lengths (5–50 mm) are stiffer relative to their travel and suit compact mechanisms with limited stroke, such as button returns, probe contacts, and small latches. Longer lengths (60–100 mm) provide more travel and softer effective rates for the same wire and OD, making them better for vibration isolation mounts and applications needing gradual force buildup over a longer stroke.