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When a loose spring causes a mechanism to fail mid-cycle, the cost is more than just the part — it's downtime, rework, and frustration. Engineers, machinists, and serious DIYers who need a reliable compression spring in a specific size know how hard it is to find the exact spec without ordering a full factory run. These 304 stainless steel compression pressure springs are stocked in a wide matrix of sizes so you can match your application precisely, whether you're replacing a worn-out spring or designing from scratch.
Each spring is formed from 304-grade stainless steel wire with a diameter of 1.5mm (0.059 in). Outer diameters span 10mm to 25mm (0.39–0.98 in), and free lengths range from 10mm to 200mm (0.39–7.87 in). The coil ends are closed and ground flat for stable seating and consistent load distribution across the full compression stroke.
Typical use cases include mechanical assemblies requiring consistent return force, such as valve actuators and push-button mechanisms; precision jigs and fixtures where repeatable spring-back is critical; and light-duty industrial or workshop equipment where corrosion resistance matters — for example, outdoor enclosures, damp environments, or food-adjacent tooling that rules out carbon steel alternatives.
| Material | 304 Stainless Steel |
|---|---|
| Wire Diameter | 1.5mm (0.059 in) |
| Outer Diameter (OD) | 10mm – 25mm (0.39 – 0.98 in) |
| Free Length | 10mm – 200mm (0.39 – 7.87 in) |
| End Type | Closed and Ground |
| Spring Type | Compression (Pressure) |
| Spring Rate | See variant options |
| Max Load Capacity | See variant options |
| Surface Finish | Natural (uncoated stainless) |
| Coil Direction | Right-hand (standard) |
| Available Quantities | 1 Pcs / 20 Pcs / 40 Pcs |
Measure the bore or guide rod your spring will seat in. The spring OD should be slightly smaller than the bore (typically 0.5–1mm clearance) or slightly larger than the guide rod. For free length, select a spring that is longer than your required compressed length to ensure adequate travel and preload. Use the variant selector to match Wire Dia × OD × Length to your measured dimensions.
Load capacity depends on the specific OD and free length combination selected. Shorter springs with smaller ODs generally have higher spring rates (stiffer), while longer springs with larger ODs tend to be softer. For precise load-deflection data for a specific variant, contact us to confirm before ordering for load-critical applications.
Yes. 304 stainless steel provides solid resistance to atmospheric corrosion, moisture, and mild chemical exposure. It is suitable for outdoor enclosures, damp workshops, and light marine-adjacent applications. For highly aggressive environments (saltwater immersion, strong acids), 316 stainless steel would be a more appropriate choice.
All three quantity options contain the same spring in the same size. The 1 Pcs option is ideal for prototyping, testing, or single-unit repairs. The 20 Pcs and 40 Pcs packs offer a lower per-unit cost and are suited for production runs, maintenance kits, or stocking multiple sizes. Note that bulk quantity options are currently available for the 1.5×25×50mm size.
The ends are closed and ground flat. This means the terminal coils are tightly wound (closed) and then machined flat (ground) to create a perpendicular, stable seating surface. This reduces lateral buckling under load and ensures the spring sits squarely in its seat or against a flat surface.
In many cases, yes — provided the OEM spring uses standard metric dimensions matching the wire diameter, OD, and free length of the variant you select. Always verify the spring rate and load requirements of the original part before substituting. If you have the OEM spring's part number or datasheet, contact us and we can help confirm compatibility.
These springs are wound in the standard right-hand direction. For most compression spring applications — where the spring is simply compressed axially — coil direction does not affect performance. Coil direction only becomes relevant in specific torque-spring or interlocking-coil designs, which are not typical for standard compression use.
