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When a loose fit, premature fatigue, or inconsistent spring force derails your project, the root cause is almost always an off-spec spring. Hobbyists, engineers, and repair technicians who need exact dimensional control — from miniature electronics assemblies to precision mechanical fixtures — demand springs that hold their rated geometry under repeated cycling.
This pack of 10 compression springs is formed from 304 stainless steel wire with a diameter of 1.4 mm or 1.5 mm (depending on variant selected). The outer diameter (OD) spans 9–25 mm across the available size range, with free lengths from 10–50 mm. Each spring features open, ground-flat ends for stable seating and consistent load distribution.
Typical use cases include DIY mechanical assemblies requiring small-diameter compression springs, precision instrument repair calling for stainless steel compression springs with tight tolerances, and prototyping or maker projects where 304 SS spring wire dia 1.4mm or 1.5mm components must resist corrosion in humid or mildly corrosive environments.
| Material | 304 Stainless Steel |
|---|---|
| Wire Diameter | 1.4 mm or 1.5 mm (see variant options) |
| Outer Diameter (OD) | 9–25 mm (see variant options) |
| Free Length | 10–50 mm (see variant options) |
| End Type | Open, Ground Flat |
| Coil Direction | Right-hand (standard) |
| Spring Rate | See variant options |
| Load Capacity | See variant options |
| Quantity per Pack | 10 Pieces |
| Surface Finish | Natural (uncoated stainless) |
| Weight (per pack) | See variant options |
Measure your bore inner diameter (ID) — the spring OD should be approximately 0.5–1.5 mm smaller than the bore ID to allow free movement without binding. For free length, select a spring whose free length is longer than your required working length by at least the amount of preload travel you need. Check the variant size format: Wire Dia × OD × Free Length (all in mm).
A thicker wire (1.5 mm) produces a stiffer spring with a higher spring rate and load capacity for the same OD and free length compared to 1.4 mm wire. If your application requires more force at a given deflection, choose 1.5 mm wire. For lighter loads or more travel, 1.4 mm wire may be more appropriate.
304 stainless steel provides solid resistance to oxidation, moisture, and mild chemical exposure. It performs well in indoor humid environments, light outdoor use, and contact with water. For highly corrosive environments (saltwater immersion, strong acids or chlorides), consider 316 stainless steel instead. These springs are not coated, so the natural stainless surface is the corrosion barrier.
Yes — the open ground-flat ends are designed to seat flat against standard spring seats, retainer plates, and counterbored holes. Ensure your seat recess diameter is slightly larger than the spring OD and that the recess depth accommodates the end coil thickness. Refer to the variant dimensions to confirm fit before assembly.
304 stainless steel retains adequate mechanical properties up to approximately 300–400°C (570–750°F) for intermittent exposure. For continuous high-temperature service above this range, a high-temperature alloy spring (such as Inconel) would be more appropriate. For typical DIY, electronics, and light mechanical applications at ambient temperatures, these springs are well-suited.
Spring rate and load capacity depend on wire diameter, OD, free length, and number of active coils — all of which vary by variant. If you need specific load data, please contact us with your selected variant size and required deflection, and we can provide technical details.
A 10-piece pack gives you spares for prototyping iterations, replacements if one spring is damaged during installation, and stock for small-batch production runs — all at a lower per-unit cost than single-piece sourcing.
