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Finding a compression spring that holds its load cycle after cycle without corroding, fatiguing, or losing tension is a real challenge for engineers, makers, and maintenance professionals alike. These 150mm compression springs are engineered for demanding applications where consistent spring force and long service life are non-negotiable.
Each spring is formed from 304 stainless steel wire, available in wire diameters ranging from 0.3 mm to 2 mm (approximately 0.012"–0.079") and outer diameters from 3 mm to 25 mm (approximately 0.12"–0.98"). The free length is 150 mm (approximately 5.91"). Springs are supplied in a closed-end, ground configuration for stable seating and accurate load delivery.
Typical use cases include mechanical assemblies requiring consistent return force, DIY fabrication projects such as custom jigs and fixtures, industrial equipment maintenance where OEM springs need replacement, and precision instrument or valve spring applications requiring tight dimensional tolerances.
Formed from 304-grade stainless steel wire for reliable corrosion resistance in humid, wet, and mildly chemical environments.
Wire diameters from 0.3 mm to 2 mm and outer diameters from 3 mm to 25 mm cover a broad spectrum of mechanical design requirements.
Consistent 150 mm (5.91") free length across all variants ensures predictable deflection and load characteristics for your assembly.
Closed and ground end configuration provides a flat, stable seating surface for accurate load transfer and reduced lateral buckling tendency.
Precision-wound coils maintain uniform pitch and spring rate, delivering repeatable compression force across the full deflection range.
Order a single spring for prototyping or two pieces for paired applications — select your preferred quantity from the variant options above.
| Material | 304 Stainless Steel |
|---|---|
| Free Length | 150 mm (5.91") |
| Wire Diameter Range | 0.3 mm – 2 mm (0.012" – 0.079") |
| Outer Diameter Range | 3 mm – 25 mm (0.12" – 0.98") |
| End Type | Closed & Ground |
| Wind Direction | Right-hand (standard) |
| Finish | Natural / Bright |
| Spring Rate | See variant options |
| Max Load | See variant options |
| Quantity per Order | 1 PCS or 2 PCS (select above) |
Start with your spring seat bore (inner diameter of the housing) — the spring's outer diameter should be slightly smaller than the bore for a sliding fit, typically 0.2–0.5 mm clearance. Then select a wire diameter that delivers the spring rate and load capacity your application requires. Heavier wire diameters produce stiffer springs with higher load capacity. If you are unsure, contact us with your load and deflection requirements and we can help you select the correct variant.
These compression springs are suitable for a wide range of mechanical and industrial applications. The load capacity varies by wire diameter and outer diameter — thicker wire variants (1.5 mm–2 mm) are capable of handling significantly higher loads than fine-wire variants (0.3 mm–0.5 mm). For critical load-bearing applications, always verify the spring rate and maximum load against your design requirements before installation.
304 stainless steel offers good corrosion resistance in most atmospheric, freshwater, and mildly chemical environments. It is suitable for outdoor use in non-coastal areas and for applications involving water or mild cleaning agents. For highly corrosive environments such as saltwater or strong acids, consider 316 stainless steel instead. These springs are not recommended for prolonged immersion in chloride-rich solutions.
These springs are compatible with a broad range of applications including mechanical assemblies, DIY jigs and fixtures, valve and actuator mechanisms, electronic enclosure latches, furniture hardware, automotive accessories, and general industrial equipment maintenance. The wide range of wire and outer diameter options means you can find a variant suited to both light-duty and moderate-load applications.
Yes, provided the free length (150 mm), outer diameter, and wire diameter match your OEM spring specifications. We recommend measuring your original spring's free length, outer diameter, wire diameter, and number of coils before ordering. If your OEM spring has a different free length, these springs may not be a direct drop-in replacement without modification to your assembly.
The 1 PCS option supplies a single spring, ideal for prototyping, testing, or single-spring assemblies. The 2 PCS option supplies two springs of the same specification, suited for paired or symmetrical applications such as dual-spring mechanisms, balanced actuators, or when you need a spare. The 2 PCS price per spring is typically lower than buying two individual 1 PCS orders.
Measure the free length (uncompressed end-to-end length), outer diameter (widest point across the coils), and wire diameter (thickness of the wire itself) using calipers. Also count the total number of coils if you need to match spring rate precisely. Compare these measurements to the variant specifications listed above. If you need assistance interpreting your measurements, contact us before ordering.
