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When a worn-out spring causes a mechanism to fail — a stuck valve, a sluggish latch, or a jittery assembly — finding the exact replacement size is the real challenge. These 2mm wire diameter compression springs are designed for engineers, technicians, and hands-on DIYers who need a precise, ready-to-install solution without custom fabrication delays.
Each spring is formed from 2mm wire diameter steel, with outer diameters ranging from 12mm to 30mm (approximately 0.47 in to 1.18 in) and free lengths spanning 10mm to 200mm (approximately 0.39 in to 7.87 in). The open-coil helical design delivers consistent linear compression force across the full stroke range.
These compression springs suit a wide range of use cases: replacing worn return springs in automotive throttle and brake assemblies, providing preload force in industrial valve and actuator mechanisms, and serving as tension-balancing elements in precision DIY jigs, fixtures, and electronic enclosure latches.
Consistent 2mm wire cross-section across all variants ensures uniform coil geometry and predictable spring rate for drop-in replacement applications.
Outer diameters from 12mm to 30mm and free lengths from 10mm to 200mm give you a broad selection to match existing spring seats without custom orders.
The open-coil design allows full compression travel with minimal coil binding, maintaining consistent force delivery throughout the stroke.
Engineered for linear load-deflection behavior, making these springs suitable for applications requiring repeatable, measurable return force.
Shorter lengths (10–50mm) are available in 4-piece packs for assembly line or repair kit use; longer lengths (60–200mm) are offered as single pieces for larger mechanisms.
Suitable for automotive, industrial machinery, electronic enclosures, furniture hardware, and general mechanical DIY repair — wherever a compact compression spring is needed.
| Wire Diameter | 2mm (0.079 in) |
|---|---|
| Outer Diameter Range | 12mm – 30mm (0.47 in – 1.18 in) |
| Free Length Range | 10mm – 200mm (0.39 in – 7.87 in) |
| Spring Type | Open-coil helical compression spring |
| Material | See variant options |
| Surface Finish | See variant options |
| Spring Rate | See variant options |
| End Type | See variant options |
| Pack Quantity | 4 PCS (lengths 10–50mm) / 1 PCS (lengths 60–200mm) |
| Application | Automotive, industrial, DIY mechanical assemblies |
Measure the inner bore or spring seat diameter of your mechanism. The spring's outer diameter should be slightly smaller than the bore to allow free movement without binding. For a shaft-guided spring, the inner diameter of the spring (outer diameter minus twice the wire diameter) should be slightly larger than the shaft. Use the variant selector above to match your required outer diameter from 12mm to 30mm.
The free length is the uncompressed length of the spring. Measure the available space in your assembly when the spring is at rest (unloaded). Select a free length equal to or slightly longer than this measurement. If you need a specific compressed height, subtract your required stroke from the free length to confirm the spring will not fully compress (coil bind) under load.
Spring strength (rate) varies by outer diameter and free length combination. Shorter, smaller-diameter springs with 2mm wire will have a higher spring rate (stiffer) than longer, larger-diameter variants. If you require a specific load at a defined deflection, please contact us to confirm the spring rate for your chosen variant before ordering.
Corrosion resistance depends on the material and surface finish of the specific variant. For applications exposed to moisture, chemicals, or outdoor environments, we recommend confirming the material specification with us before purchase. Stainless steel variants offer significantly better corrosion resistance than carbon steel options.
Yes. These 2mm wire compression springs are commonly used in automotive throttle return mechanisms, brake assemblies, valve actuators, and industrial equipment where a compact, reliable return spring is required. Always verify the spring rate, free length, and outer diameter match your OEM specification before installation in safety-critical systems.
Shorter springs (10mm–50mm free length) are typically used in higher quantities per assembly — such as in multi-spring fixtures, electronics, or small mechanisms — so they are offered in 4-piece packs for convenience and value. Longer springs (60mm–200mm) are generally used one per assembly in larger mechanisms, so they are sold individually. The pack quantity is clearly indicated in the variant name.
You need three measurements from your existing spring or assembly: wire diameter (2mm for all variants here), outer diameter, and free length. Match these to the variant options above. If you are replacing a worn spring and cannot measure it directly, measure the spring seat bore (for OD reference) and the unloaded cavity depth (for free length reference). Contact us if you need further sizing assistance.
