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Engineers, makers, and repair technicians often struggle to find compression springs that hold their rated load without corroding in humid or chemically exposed environments. These A2 stainless steel compression springs with a 1.4mm wire diameter are engineered for consistent spring force and long service life, making them a dependable choice for both industrial assemblies and DIY projects.
Each spring is formed from A2 (304) stainless steel wire with a diameter of 1.4mm. Outer diameters span 8mm to 15mm (approximately 0.31" to 0.59"), and free lengths range from 10mm to 120mm (approximately 0.39" to 4.72"). Available in packs of 2, 5, or 10 pieces to suit prototyping and production needs alike.
Typical use cases include CNC machine tool return mechanisms, 3D printer bed leveling assemblies, electronic enclosure latches, valve return springs in fluid control systems, and general-purpose compression spring replacement in automation control components.
Formed from grade A2 stainless steel wire, offering solid corrosion resistance in damp, mildly acidic, and outdoor environments without surface treatment.
Consistent 1.4mm wire cross-section across all variants ensures predictable spring rate and reliable coil geometry for repeatable performance.
Outer diameters from 8mm to 15mm and free lengths from 10mm to 120mm cover a broad spectrum of spring seat configurations in a single product family.
Choose from packs of 2, 5, or 10 pieces — ideal for prototyping single units or stocking spares for production maintenance.
End coils are closed to provide a flat seating surface, ensuring stable axial load transfer and reduced lateral deflection under compression.
Dimensionally consistent coils suit CNC return mechanisms, 3D printer assemblies, valve actuators, and other automation control component applications.
| Material | A2 Stainless Steel (Grade 304) |
|---|---|
| Wire Diameter | 1.4 mm (0.055") |
| Outer Diameter (OD) | 8 mm – 15 mm (0.31" – 0.59") |
| Free Length | 10 mm – 120 mm (0.39" – 4.72") |
| Spring Type | Compression Spring |
| End Type | Closed Ends |
| Surface Finish | Natural Stainless (no coating) |
| Spring Rate | See variant options |
| Max Load | See variant options |
| Packaging | 2 / 5 / 10 pcs per pack |
| Standard | DIN 2098 / ISO 10243 (typical for this wire class) |
Measure the bore or spring seat in your assembly. The spring OD should be 0.5–1mm smaller than the bore ID for a sliding fit, or match the guide rod OD with 0.5mm clearance. For free length, select a spring that is 20–30% longer than your required compressed length to stay within the elastic range.
The ID value in parentheses refers to the approximate inner diameter of the spring in millimeters. For example, "1.4 x 8mm (ID:5.2)" means the wire diameter is 1.4mm, the outer diameter is 8mm, and the inner diameter is approximately 5.2mm (OD minus 2× wire diameter). Use this to size guide rods correctly.
These springs are suited for light-to-medium duty applications typical of 1.4mm wire diameter. They are commonly used in return mechanisms, latches, valve actuators, and sensor assemblies. For heavy structural loads, a larger wire diameter is recommended. Consult the spring rate for your selected variant before use in critical load paths.
A2 (304) stainless steel provides solid resistance to atmospheric corrosion, fresh water, and mild chemical exposure. It is suitable for indoor humid environments, light outdoor use, and many industrial settings. For highly aggressive environments such as saltwater immersion or strong acids, A4 (316) stainless steel would be a better choice.
Yes. The 8–15mm OD range and 10–120mm length options cover common spring seat dimensions found in 3D printer bed leveling systems, CNC axis return mechanisms, and automation control components. Verify the OD and free length against your machine's spring specification before ordering.
Yes. Packs of 2 pieces are available for select size and length combinations, allowing you to test fit and function before committing to larger quantities. Packs of 5 and 10 are also available for most variants.
These springs feature closed ends, which provide a flat seating surface for stable axial load transfer. This end type is standard for most compression spring applications and ensures the spring sits squarely in its seat without tilting under load.
