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When a project demands consistent return force in a compact envelope — whether you're repairing a mechanism, building a custom fixture, or sourcing replacement springs for industrial equipment — finding the exact wire diameter, outer diameter, and free length in one place is rarely straightforward. These 1.5mm wire diameter compression springs are engineered for makers, maintenance technicians, and small-batch manufacturers who need dimensional accuracy without minimum-order headaches.
Each spring is formed from stainless steel wire with a nominal wire diameter of 1.5mm (0.059"). Outer diameters span 10mm to 25mm (0.39"–0.98"), and free lengths range from 10mm to 200mm (0.39"–7.87"). The closed-end coil geometry provides flat seating surfaces for predictable load distribution. Pack quantities vary by length: 10-piece packs for shorter lengths (10–50mm), 2-piece packs for mid-range lengths (60–100mm), and single-piece for longer lengths (120–200mm).
Typical use cases include: spring-loaded latches and door catches requiring a 10–20mm travel stroke; electronic enclosure button returns where a 10–12mm OD fits standard PCB cutouts; light-duty valve assemblies in fluid handling systems; and custom jig or fixture tensioners in CNC or woodworking setups where a 15–25mm OD compression spring provides repeatable clamping force.
| Wire Diameter | 1.5mm (0.059") |
|---|---|
| Outer Diameter Range | 10mm – 25mm (0.39" – 0.98") |
| Inner Diameter Range | See variant options |
| Free Length Range | 10mm – 200mm (0.39" – 7.87") |
| Material | Stainless Steel |
| End Type | Closed ends |
| Spring Rate | See variant options |
| Load Capacity | See variant options |
| Surface Finish | Natural stainless (uncoated) |
| Pack Quantity | 1 / 2 / 10 pcs (varies by length — see variant options) |
| Application | General mechanical, DIY, light industrial |
Measure the inner diameter of your housing bore (the hole or cavity the spring sits in) and select an outer diameter 0.5–1.5mm smaller to allow free movement without binding. If the spring rides on a guide rod, measure the rod diameter and select an inner diameter (OD minus 2× wire diameter) that clears the rod by at least 0.5mm. Available ODs range from 10mm to 25mm in this listing.
Order a free length equal to your required installed length plus your desired compression travel. For example, if you need 30mm of installed length with 10mm of travel, select a spring with approximately 40–45mm free length. Available free lengths run from 10mm to 200mm across variants.
Spring rate depends on wire diameter, outer diameter, free length, and number of active coils. With a 1.5mm wire diameter, these springs are suited for light-to-medium duty loads — typically in the range of a few Newtons to tens of Newtons depending on the specific variant. For precise load requirements, contact us to confirm the spring rate and solid height for your selected variant before ordering.
Stainless steel provides good resistance to atmospheric moisture, mild acids, and oxidation — making it suitable for outdoor fixtures, humid enclosures, and food-adjacent equipment. It is not recommended for highly concentrated chloride environments (e.g., saltwater immersion) or strong oxidizing acids without additional protective measures. For standard indoor and light outdoor use, stainless steel is a reliable choice over carbon steel.
Standard stainless steel compression springs are generally suitable for temperatures up to approximately 250°C (480°F) before significant loss of spring rate occurs. For applications above this range, specialized high-temperature alloys (e.g., Inconel) are recommended. Contact us to confirm suitability if your operating temperature exceeds 200°C.
We recommend ordering a small pack (2-piece or 10-piece depending on the length) to verify fit, travel, and load behavior in your assembly before scaling up. Check the outer diameter against your housing bore, confirm the free length provides adequate travel, and test the spring rate against your load requirement. If you need a specific spring rate confirmed, contact us with your application details.
Pack quantity varies by free length to balance shipping efficiency and typical usage patterns. Springs with free lengths of 10–50mm are available in 10-piece packs — ideal for prototyping or small assemblies needing multiple springs. Mid-range lengths (60–100mm) come in 2-piece packs. Longer springs (120–200mm) are sold individually. Select the variant that matches both your required length and quantity.
