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When a worn-out spring causes a mechanism to fail — a pen that won't click, a switch that won't return, a valve that won't seat — finding the exact replacement size is the real challenge. These 0.6mm wire diameter compression springs are designed for makers, repair technicians, and engineers who need a precise, consistent coil spring without ordering in bulk or waiting on custom fabrication.
Each spring is formed from carbon steel wire with a wire diameter of 0.6mm (approximately 0.024 in). Outer diameters span 4mm to 12mm (approx. 0.16–0.47 in), and free lengths range from 5mm to 100mm (approx. 0.20–3.94 in). Springs are sold in packs of 5 or 10 pieces depending on the selected length variant.
Typical applications include small appliance repair (clocks, pens, lighters), electronics assembly (battery contacts, switch returns), hobby and model engineering, and light-duty mechanical fixtures where a compact compression spring with consistent spring rate is required.
Consistent wire gauge across all size variants for predictable spring rate and deflection behavior in compact assemblies.
Outer diameters from 4mm to 12mm and free lengths from 5mm to 100mm — 135 combinations to match your exact application.
Formed from carbon steel wire offering a balance of tensile strength and elasticity suited to light-to-medium compression loads.
Shorter lengths (5–50mm) ship in 10-piece packs; longer lengths (60–100mm) in 5-piece packs — enough for repairs and spares.
Closed (ground or plain) end coils provide a flat seating surface for stable load transfer in bores and spring pockets.
Used in pen mechanisms, battery contacts, valve returns, model engineering, and light mechanical fixtures requiring a small coil spring.
| Wire Diameter | 0.6mm (approx. 0.024 in) |
|---|---|
| Outer Diameter | 4mm – 12mm (approx. 0.16–0.47 in) — See variant options |
| Free Length | 5mm – 100mm (approx. 0.20–3.94 in) — See variant options |
| Material | Carbon Steel |
| End Type | Closed ends |
| Spring Type | Compression |
| Quantity per Pack | 5 pcs (lengths 60–100mm) / 10 pcs (lengths 5–50mm) |
| Finish | Bare steel (uncoated) |
| Spring Rate | See variant options |
| Max Load Capacity | See variant options |
Measure the inner diameter of the bore or housing where the spring will sit. The spring's outer diameter should be slightly smaller than the bore — typically 0.2–0.5mm clearance — to allow free compression without binding. For a shaft-guided spring, the inner diameter of the spring should be slightly larger than the shaft diameter.
The free length is the uncompressed length of the spring. Select a free length that is longer than your required working length by at least the amount of travel (deflection) you need. For example, if you need 20mm of travel and the spring should be 10mm at full compression, choose a free length of at least 30mm.
With a 0.6mm wire diameter, these are light-duty springs suited for applications such as pen mechanisms, battery contacts, small switches, valve returns, and hobby models. They are not intended for heavy industrial loads. If your application requires significant force, consider a larger wire diameter.
These springs are made from bare carbon steel without a protective coating. They are suitable for dry indoor environments. For humid, wet, or outdoor applications, consider applying a light oil or using stainless steel springs instead to prevent surface oxidation.
Yes. Small compression springs are commonly used as battery contact springs in flashlights, remote controls, and portable devices. Ensure the outer diameter fits within the battery compartment contact area and the free length provides adequate contact pressure when compressed.
Pack quantity depends on the length variant selected. Springs with free lengths of 5mm to 50mm come in packs of 10 pieces. Springs with free lengths of 60mm to 100mm come in packs of 5 pieces. The quantity is shown in the variant name (e.g., "30mm & 10pcs").
The outer diameter (OD) is the full width of the spring coil measured from the outside edge. The inner diameter (ID) is the open center of the spring. For a 0.6mm wire spring: ID = OD − (2 × 0.6mm). For example, a 6mm OD spring has an inner diameter of approximately 4.8mm.
