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When a mechanism fails because a tiny spring loses tension or snaps under load, the whole project stalls. Engineers, hobbyists, and repair technicians who work with compact assemblies — electronics enclosures, pen mechanisms, valve actuators, and precision instruments — need a reliable source of small-diameter compression springs in exact dimensions. These 1mm wire diameter stainless steel compression springs are engineered for consistent force delivery in confined spaces where standard hardware-store springs simply don't fit.
Each spring is wound from 1mm (0.039 in) stainless steel wire. The outer diameter spans 6–18mm (0.24–0.71 in) and free lengths range from 10–305mm (0.39–12.0 in), covering a broad spectrum of application depths. The coil geometry follows a cylindrical open-end design typical of compression springs, providing linear load response across the compression stroke.
Typical use cases include replacing worn return springs in push-button switches and pen clickers, providing preload force in small pneumatic or hydraulic valve assemblies, and acting as cushioning elements in lightweight mechanical linkages and jigs. The stainless steel construction makes these springs well-suited for environments with moisture exposure, mild chemical contact, or where non-magnetic properties are required.
Consistent 1mm (0.039 in) wire cross-section across all variants for predictable spring rate and fatigue life in compact assemblies.
Outer diameters from 6mm to 18mm and free lengths from 10mm to 305mm — one listing covers dozens of precision dimensions for prototyping and production.
Stainless steel wire resists oxidation, mild acids, and humidity — maintaining spring force in environments where carbon steel would corrode and weaken.
Standard cylindrical open-end geometry delivers linear load-deflection behavior, making force calculations straightforward for engineering applications.
Each order ships as a pack of 10 identical springs — enough for prototyping, repair stock, or small-batch production without over-ordering.
Dimensionally consistent coils make these springs reliable drop-in replacements for worn or broken springs in pens, valves, switches, and mechanical jigs.
| Wire Diameter | 1 mm (0.039 in) |
|---|---|
| Outer Diameter (OD) | 6 mm – 18 mm (0.24 in – 0.71 in) |
| Free Length | 10 mm – 305 mm (0.39 in – 12.0 in) |
| Spring Type | Compression Spring |
| Coil Style | Cylindrical, Open End |
| Material | Stainless Steel |
| Finish | Natural (uncoated stainless) |
| Spring Rate | See variant options |
| Load Capacity | See variant options |
| Quantity per Pack | 10 Pcs |
Measure the bore or housing your spring must fit inside — the spring's outer diameter should be slightly smaller than the bore ID to allow free movement. For free length, measure the uncompressed gap the spring must fill, then add 10–20% to ensure adequate preload when assembled. Use the variant selector to match Wire Dia × OD × Length to your measured dimensions.
Load capacity depends on the specific OD and free length of each variant. Smaller OD and shorter length springs typically handle lighter loads, while larger OD variants carry more force. For precise spring rate and load data for a specific variant, contact us to confirm before ordering for load-critical applications.
Yes. These springs are wound from stainless steel wire, which provides good resistance to oxidation, moisture, and mild chemical exposure. They are suitable for outdoor, humid, or lightly corrosive environments where carbon steel springs would degrade. For highly aggressive chemical environments, confirm material compatibility with your specific media before use.
Stainless steel springs have low magnetic permeability compared to carbon steel, making them suitable for applications near sensitive electronics or magnetic sensors. However, stainless steel is not fully non-magnetic — if your application requires zero magnetic response, please contact us to confirm the alloy grade before ordering.
Yes, provided you match the OD and free length of the original spring. Measure the broken spring's outer diameter and uncompressed length, then select the matching variant. The 1mm wire diameter is common in pen mechanisms, small push-button switches, and light-duty valve return springs, making these a practical replacement source.
Free length is the spring's natural, unloaded length — the dimension listed in the variant name (e.g., 30mm). Compressed length is the length when the spring is under load in your assembly. Always design so the spring is not compressed beyond its solid height (all coils touching), as this causes permanent deformation. Leave at least 15–20% of free length as working travel.
The standard pack size is 10 pieces per order. For larger quantities, simply add multiple packs to your cart, or contact us to discuss bulk pricing options for production or commercial requirements.
