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When a project demands consistent return force and dimensional accuracy, undersized or mismatched springs cause misfires, premature fatigue, and costly rework. Engineers, hobbyists, and maintenance technicians who need a compression spring with a 1.8mm wire diameter and a broad range of outer diameters (10–16mm) and free lengths (10–200mm) will find this listing covers the majority of standard spring seats without custom tooling.
Each spring is formed from A2 (304) stainless steel wire with a nominal wire diameter of 1.8mm (0.071 in). Outer diameters span 10mm to 16mm (approx. 0.39–0.63 in) and free lengths range from 10mm to 200mm (approx. 0.39–7.87 in). Springs feature closed and ground ends for flat seating, and the coil pitch varies by length variant — see variant options for exact pitch data.
Typical use cases include: replacement springs in 3D printer extruder assemblies and bed-leveling mechanisms; return springs in pneumatic valve actuators and solenoid housings; and load springs in electronic enclosure latches, jig fixtures, and light-duty mechanical linkages where a compact stainless compression spring with corrosion resistance is required.
| Material | A2 Stainless Steel (Grade 304) |
|---|---|
| Wire Diameter | 1.8mm (0.071 in) |
| Outer Diameter Range | 10mm – 16mm (0.39 – 0.63 in) |
| Free Length Range | 10mm – 200mm (0.39 – 7.87 in) |
| End Type | Closed and Ground |
| Coil Direction | Right-hand (standard) |
| Spring Rate | See variant options |
| Surface Finish | Bright / Natural Stainless |
| Pack Quantity | 1 / 2 / 5 / 10 / 20 pcs (varies by size) |
| Operating Temperature | Typically –20°C to +150°C (–4°F to +302°F) |
| Corrosion Resistance | Good — suitable for mildly corrosive environments |
Measure the inner bore or spring pocket diameter in your assembly — the spring outer diameter should be 0.5–1.5mm smaller than the bore for a sliding fit. For free length, select a spring that is 10–20% longer than your required compressed length to ensure adequate preload. Use the variant selector above to match Wire Dia × Outer Dia × Length to your measured dimensions.
Spring rate (stiffness, measured in N/mm) increases as free length decreases and as outer diameter decreases relative to wire diameter. Because this listing covers a wide size matrix, exact spring rate values vary by variant. If your application requires a specific spring rate, contact us with your required outer diameter, free length, and target load — we can confirm suitability or recommend the closest variant.
Yes. A2 (Grade 304) stainless steel provides good resistance to atmospheric corrosion, fresh water, and mild chemical exposure. It is suitable for indoor humid environments, light outdoor use, and washdown-adjacent installations. For highly aggressive environments such as salt spray or strong acids, contact us for alternative material options.
Closed ends mean the last coil is wound tight against the adjacent coil, creating a flat contact surface. Ground ends means that flat surface is machined perpendicular to the spring axis. Together, these features ensure the spring seats squarely against retainers and plungers, minimizing lateral deflection (buckling) under axial load — important for precision assemblies like 3D printer extruders and valve actuators.
Yes. The 1.8mm wire diameter series with 10–12mm outer diameters and 10–25mm free lengths are commonly used in extruder spring seats and bed-leveling thumb-screw assemblies. Select the variant whose outer diameter fits your spring pocket and whose free length provides the preload your design requires. Ordering a 5-pack or 10-pack is recommended for prototyping to test multiple lengths.
For single-unit repair or prototyping, a 5-pack provides spares without excess inventory. A 10-pack suits small-batch production runs or assemblies requiring multiple springs per unit. A 20-pack offers the lowest per-unit cost for higher-volume production or stocking purposes. Note that pack availability varies by size — longer springs (60mm and above) are available in smaller pack quantities due to per-unit weight.
A2 stainless steel compression springs are typically rated for continuous service from –20°C to +150°C (–4°F to +302°F). Short-term exposure up to approximately 200°C is generally tolerable without significant loss of spring rate, but prolonged high-temperature use may cause stress relaxation. For applications above 150°C, contact us for material alternatives.
All dimensions are specified in metric (mm). The outer diameter range of 10–16mm corresponds to approximately 0.39–0.63 inches, and free lengths of 10–200mm correspond to approximately 0.39–7.87 inches. These springs fit standard metric spring pockets. For imperial spring seats, verify the bore diameter in millimeters before selecting a variant to ensure a proper clearance fit.
