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When a worn-out spring causes a mechanism to fail — a stuck valve, a sluggish latch, or a jammed tool — finding the exact replacement size quickly is what separates a fast fix from a frustrating delay. These compression springs are designed for engineers, technicians, and hands-on DIYers who need a precise, ready-to-install solution without waiting on custom orders.
Each spring is formed from round wire stock, typically stainless steel or carbon steel (see variant options for confirmed material), with wire diameters ranging from 0.3 mm to 2 mm (approx. 0.012 in – 0.079 in) and outer diameters spanning 3 mm to 30 mm (approx. 0.12 in – 1.18 in). All springs share a uniform free length of 305 mm (approx. 12 in), providing generous working travel before reaching solid height. Quantity options of 1, 2, 3, 5, or 10 pieces per order let you stock exactly what you need.
Typical use cases include replacing compression springs in mechanical assemblies, automotive suspension sub-components, industrial valve actuators, electronic device buttons, and workshop jig fixtures — all scenarios where a consistent spring rate and corrosion-resistant finish are critical for long-term reliability.
| Free Length | 305 mm (approx. 12 in) |
|---|---|
| Outer Diameter Range | 3 mm – 30 mm (0.12 in – 1.18 in) |
| Wire Diameter Range | 0.3 mm – 2.0 mm (0.012 in – 0.079 in) |
| Spring Type | Compression (open-coil, axial load) |
| End Type | Closed ends (typical); see variant options |
| Material | See variant options |
| Surface Finish | See variant options |
| Spring Rate | See variant options |
| Quantity per Order | 1 / 2 / 3 / 5 / 10 pcs (select above) |
| Coil Direction | Right-hand (typical) |
Measure the bore or housing that will contain the spring. The spring's outer diameter should be 0.5 mm – 1.5 mm smaller than the bore to allow free movement without binding. For a guide rod application, the inner diameter of the spring should be at least 0.5 mm larger than the rod. Use the variant selector above to pick the outer diameter that fits your measured clearance.
Thicker wire diameters produce stiffer springs with higher spring rates. For light-duty applications such as electronic buttons or small latches, wire diameters of 0.3 mm – 0.6 mm are typically appropriate. For heavier mechanical loads such as valve actuators or tool fixtures, wire diameters of 1.0 mm – 2.0 mm are more suitable. If you have a specific load requirement in Newtons or pounds-force, contact us to confirm the spring rate for your chosen variant.
These springs are manufactured from wire selected for resistance to oxidation in typical indoor and light-duty environments. For confirmed material specification and corrosion resistance rating for your specific environment (e.g., salt spray, chemical exposure), please contact us before ordering. Stainless steel variants offer superior corrosion resistance compared to carbon steel variants.
Free length is the overall length of the spring when no load is applied. A 305 mm free length gives you significant working travel — the spring can be compressed down toward its solid height depending on the wire diameter and coil count. Springs can be cut shorter using a rotary tool or spring cutter, but cutting may alter the end condition and spring rate. We recommend ordering the closest standard length to your requirement rather than cutting.
Yes — the closed-end coil configuration seats flat against standard spring seats and retainers. Verify that your seat's inner diameter accommodates the spring's outer diameter and that the seat depth is sufficient for your required compressed length. For custom or non-standard seat geometries, contact us to confirm compatibility.
If you are replacing a single failed spring in a one-off repair, the 1 pc option is the most economical choice. For prototyping or testing multiple configurations, the 2 or 5 pc options provide spares without significant over-investment. For production runs, small-batch manufacturing, or stocking a workshop, the 10 pc option offers the best per-unit value. All quantity options are available in the variant selector above.
These compression springs are suitable for light-to-medium duty automotive sub-components (e.g., valve springs, latch mechanisms, sensor assemblies) and general industrial machinery where the load, travel, and environmental conditions fall within the spring's rated parameters. For safety-critical or high-cycle-fatigue applications, please contact us to confirm the spring's fatigue life and load rating before use.
