Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Engineers, makers, and maintenance professionals who need reliable spring force in compact assemblies often struggle to find compression springs that hold their rated load without corroding or fatiguing prematurely. These 304 stainless steel compression springs are engineered for consistent performance across a wide range of mechanical applications where dimensional accuracy and corrosion resistance both matter.
Each spring is formed from 1.2mm diameter 304 stainless steel wire, with outer diameters spanning 16mm to 20mm (approximately 0.63 in to 0.79 in) and free lengths available from 10mm to 120mm (approximately 0.39 in to 4.72 in). The inner diameter (ID) ranges from approximately 13.6mm to 17.6mm depending on the selected size variant, providing a clear bore for guided-rod installations.
Typical use cases include CNC machine tool fixtures requiring repeatable return force, 3D printer extruder and bed-leveling assemblies needing consistent preload, and industrial valve or actuator mechanisms where a compact compression spring with a defined free length is required. The multi-size selection and flexible pack quantities (2, 5, or 10 pieces) make these springs suitable for both prototyping and small-batch production runs.
Formed from 304-grade stainless wire for reliable corrosion resistance in humid, wet, or mildly chemical environments — a step up from carbon steel alternatives that rust under similar conditions.
Uniform 1.2mm wire diameter throughout ensures consistent spring rate and predictable deflection behavior across the full compression stroke.
Five outer diameter options (16mm, 17mm, 18mm, 19mm, 20mm) let you match the spring to your housing bore or guided-rod clearance without custom tooling.
Eighteen length options from 10mm to 120mm give you precise control over working travel and preload, covering short-stroke detent applications through longer-travel return mechanisms.
Available in packs of 2, 5, or 10 pieces — order a small trial quantity for prototyping or a larger pack for production without overstocking.
Closed and ground ends (typical for this spring class) provide flat seating surfaces for stable load transfer and reduced lateral buckling tendency during compression.
| Material | 304 Stainless Steel |
|---|---|
| Wire Diameter | 1.2 mm |
| Outer Diameter (OD) | 16 mm / 17 mm / 18 mm / 19 mm / 20 mm (see variant options) |
| Inner Diameter (ID) | 13.6 mm / 14.6 mm / 15.6 mm / 16.6 mm / 17.6 mm (see variant options) |
| Free Length | 10 mm – 120 mm (see variant options) |
| Spring Type | Compression (pressure) |
| End Type | See variant options |
| Spring Rate | See variant options |
| Pack Quantity | 2 / 5 / 10 pcs (see variant options) |
| Finish | Natural stainless (uncoated) |
Measure the bore or housing that will contain the spring. The spring's outer diameter should be slightly smaller than the bore to allow free movement without binding. For guided-rod installations, the inner diameter (ID) must be larger than the rod diameter — check the ID listed in each size variant (13.6mm to 17.6mm) against your rod size.
Free length is the uncompressed length of the spring. Select a free length that, when compressed to your working height, delivers the load force you need. As a starting point, the working length is typically 20–30% shorter than the free length for moderate preload applications. If you are unsure, order a small pack (2 pcs) of two or three candidate lengths to test before committing to a larger quantity.
Spring load depends on wire diameter, coil diameter, number of active coils, and deflection. With a 1.2mm wire diameter and ODs of 16–20mm, these springs are suited for light-to-medium duty applications such as detent mechanisms, return springs in small actuators, and preload springs in 3D printer assemblies. For exact load-deflection data, contact us with your specific size and length requirements.
Yes. 304 stainless steel offers good resistance to atmospheric corrosion, moisture, and mild chemical exposure. It is suitable for outdoor, humid, or lightly corrosive environments. For highly aggressive chemical or saltwater environments, 316 stainless steel would be a stronger choice — contact us if you need that grade.
Yes, these are a popular choice for 3D printer applications. The 16mm and 17mm OD variants with shorter free lengths (10–25mm) are commonly used for bed-leveling preload springs, while longer lengths suit extruder return mechanisms. Verify the ID clears your guide rod or bolt before ordering.
The pack size determines how many springs you receive per order. Packs of 2 are ideal for single-unit repairs or prototyping. Packs of 5 suit small builds or having spares on hand. Packs of 10 offer the best per-unit value for production runs or multi-axis machines. All pack sizes contain identical springs — only the quantity differs.
Yes. The consistent wire diameter and stainless construction make these suitable for CNC tool-change mechanisms, fixture clamps, and light industrial actuators where repeatable spring force and corrosion resistance are required. For high-cycle fatigue applications, confirm the spring rate and stress levels with your mechanical engineer.
