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When a mechanism fails because a worn or undersized torsion spring can no longer hold its return force, the entire assembly suffers — from cabinet hinges and tool holders to precision instruments and automotive components. Engineers, technicians, and hands-on makers who need a reliable, dimensionally consistent replacement or design-in spring will find this range covers the most common small-spring specifications in a single listing.
Each pack contains 10 pieces of left-hand wound torsion springs manufactured from spring steel wire. Wire diameter is 0.8 mm (approx. 0.031 in). Outer diameter (OD) options span 5 mm to 10 mm (approx. 0.197 in to 0.394 in) in 0.5 mm increments. Active coil counts range from 3 to 9 coils, and leg angles are available in 60°, 90°, 120°, and 180° to suit a wide variety of mounting configurations.
Typical use cases include left-hand torsion spring replacement for cabinet door hinges, small-appliance return mechanisms, jig and fixture clamps, electronic enclosure latches, and prototype assemblies where a compact coil spring with a defined leg angle is required.
Made from spring steel wire for consistent elastic return force and resistance to fatigue over repeated deflection cycles.
Nine OD options (5–10 mm) × seven coil counts (3–9) × four leg angles (60°/90°/120°/180°) — 250+ combinations in one listing.
Consistent left-hand coil orientation for applications requiring counter-clockwise torque or pairing with right-hand springs.
Each order ships as a pack of 10 identical springs — ideal for prototyping, repair stock, or small-batch production.
Pre-formed legs at 60°, 90°, 120°, or 180° eliminate the need for manual bending and ensure repeatable assembly geometry.
3 to 9 active coils let you tune spring rate and angular travel to match your specific torque and deflection requirements.
| Wire Diameter | 0.8 mm (0.031 in) |
|---|---|
| Outer Diameter (OD) | 5 mm / 5.5 mm / 6 mm / 6.5 mm / 7 mm / 7.5 mm / 8 mm / 9 mm / 10 mm |
| Inner Diameter (ID) | OD − 1.6 mm (e.g., 5 mm OD → 3.4 mm ID) |
| Number of Active Coils | 3 / 4 / 5 / 6 / 7 / 8 / 9 Coils |
| Leg Angle | 60° / 90° / 120° / 180° |
| Wind Direction | Left-hand (counter-clockwise) |
| Material | Spring Steel |
| Surface Finish | See variant options |
| Spring Rate | See variant options |
| Free Angle | See variant options |
| Quantity per Pack | 10 pieces |
Start with the mandrel (shaft) diameter your spring will wrap around — the spring's inner diameter (ID = OD − 1.6 mm for 0.8 mm wire) should be slightly larger than the mandrel to allow free rotation. Then select the coil count based on the angular travel and torque you need: more coils give a lower spring rate (softer) for the same OD, while fewer coils give a higher rate (stiffer). Use the variant selector above to match your OD and coil count.
Left-hand wound means the coils spiral counter-clockwise when viewed from the leg end. This matters because a torsion spring is designed to be loaded in the direction that tightens the coils — for a left-hand spring, that is a clockwise load on the body. If your mechanism applies a counter-clockwise load, you need a right-hand spring instead. Always verify wind direction before ordering.
The leg angle is the angle between the two straight legs of the spring in its free (unloaded) state. Choose the angle that matches your assembly geometry: 90° is the most common for right-angle brackets and hinges; 180° suits flat or in-line configurations; 60° and 120° are used in specialized linkages. If your design requires a different angle, the spring can sometimes be pre-loaded to a different position, but this changes the effective spring rate.
These springs are made from spring steel, which provides excellent mechanical properties but has limited inherent corrosion resistance compared to stainless steel. For indoor, dry, or lightly humid environments they perform reliably. For outdoor, marine, or high-humidity applications, consider applying a light coating of oil or grease, or contact us to confirm whether a coated variant is available for your size.
Yes. The 0.8 mm wire diameter is suited to light-to-medium duty applications such as cabinet hardware, instrument panels, small appliance mechanisms, jig clamps, and electronic enclosure latches. For heavy-duty industrial applications requiring larger wire diameters or higher torque ratings, please check our other spring listings or contact us for guidance.
Measure the outer diameter (OD) with calipers — this is the widest point across the coil body. Count the number of active coils (full turns between the two legs). Measure the wire diameter (the thickness of the wire itself). Finally, measure the angle between the two legs in the free state. Match all four parameters to the variant options above. If your existing spring is right-hand wound, note that these are left-hand only.
Each listing is sold as a pack of 10 identical springs. This pack format is designed for prototyping, repair stock, and small-batch production where having spares on hand reduces downtime. If you need larger quantities, please contact us for bulk pricing options.
