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When a mechanism fails because a spring loses tension or snaps under repeated cycling, the root cause is almost always a mismatch between wire gauge, coil diameter, and rotation angle. Engineers, repair technicians, and serious DIYers who need an exact replacement or a custom-spec torsion spring will find this listing covers the widest practical range of configurations in a single, convenient 5-pack format.
Each spring in this set is wound from 0.45 mm (approx. 0.018 in) stainless steel wire with an outer diameter ranging from 3 mm to 6 mm (approx. 0.12 in to 0.24 in). The right-hand (clockwise) winding direction is available in 1 to 5 active coils, and the leg angle can be selected from 45°, 60°, 90°, 120°, 180°, or 270° to match your assembly geometry precisely.
Typical use cases include small appliance hinges requiring a right-hand torsion spring replacement, precision instrument latches needing a compact 3–4 mm OD coil spring, and electronics enclosure clips where a 0.45 mm wire torsion spring with a 90° or 180° leg angle provides reliable return force without bulk.
| Wire Diameter | 0.45 mm (approx. 0.018 in) |
|---|---|
| Outer Diameter (OD) | 3 mm – 6 mm (approx. 0.12 in – 0.24 in) — See variant options |
| Winding Direction | Right-hand (clockwise) |
| Active Coils | 1 / 2 / 3 / 4 / 5 — See variant options |
| Leg Angle | 45° / 60° / 90° / 120° / 180° / 270° — See variant options |
| Material | Stainless steel |
| Finish | Bright / natural stainless |
| Quantity per Order | 5 pieces |
| Weight (per set) | See variant options |
Measure the mandrel or shaft diameter your spring will sit on, then select an OD that is slightly larger than the shaft to allow free rotation. For a shaft of 2.5 mm, a 3 mm OD spring is typically the closest fit. Use the variant selector above to pick from 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, or 6 mm outer diameters.
The leg angle is the angle between the two straight legs of the spring when it is in its free (unloaded) state. Measure the angle between the two mounting points in your assembly when the mechanism is at rest. Common choices are 90° for right-angle hinges, 180° for straight-leg latches, and 270° for over-center mechanisms. If your angle falls between listed options, select the nearest value and adjust your mounting geometry slightly.
More active coils produce a lower spring rate (softer spring) and allow greater angular deflection before the spring reaches its elastic limit. Fewer coils produce a stiffer spring with less travel. For light-duty latches or small hinges, 1–2 coils are usually sufficient. For applications requiring more torque or larger angular travel, choose 3–5 coils. If you are replacing an existing spring, match the coil count of the original.
Yes. Stainless steel offers significantly better corrosion resistance than carbon steel or zinc-plated springs. These springs are suitable for indoor mechanisms, outdoor enclosures, and light marine or humid environments. For highly aggressive chemical or saltwater immersion applications, confirm the specific alloy grade meets your requirements before use.
No. Torsion springs are direction-specific. A right-hand (clockwise) spring must be wound in the direction that tightens the coils when torque is applied. Using a right-hand spring in a left-hand seat will cause the coils to open under load, reducing spring force and risking failure. If your application requires a left-hand spring, please contact us to confirm availability.
Wire diameter directly affects spring rate and load capacity. A 0.45 mm wire is suited for light-duty applications such as small appliance doors, instrument panels, and electronics enclosures where low torque and compact size are priorities. Heavier wire gauges (e.g., 0.6 mm, 0.8 mm) produce stiffer springs with higher torque output. If your application requires more force, consider a larger wire diameter variant.
Each order contains 5 identical springs of the specification you select (angle, OD, and coil count). The 5-pack format is ideal for prototyping, batch repairs, or keeping spares on hand for multi-unit assemblies.
