304 Stainless Steel Compression Springs — Precision Small Springs for Robotics, Automation & DIY
Finding a reliable small compression spring that holds its load without corroding or fatiguing prematurely is a common challenge in robotics builds, automation fixtures, and precision DIY assemblies. These 304 stainless steel compression springs are engineered for engineers, makers, and small-batch manufacturers who need consistent spring force across a wide range of compact dimensions.
Each pack contains 10 pieces of helical compression springs wound from 304-grade stainless steel wire. Wire diameters range from 0.2 mm to 0.4 mm, outside diameters from 1.5 mm to 10 mm (approximately 0.06 in to 0.39 in), and free lengths from 5 mm to 50 mm (approximately 0.20 in to 1.97 in). Select your exact Wire Diameter, Outside Diameter, and Length from the variant options above.
Typical use cases include spring-loaded PCB contacts and probe pins, miniature valve and actuator return mechanisms, robotic gripper finger tensioning, 3D printer extruder and bed-leveling assemblies, and precision instrument latching mechanisms — all applications where long-tail search terms like "small stainless compression spring" and "miniature coil spring 304" are common.
✅ Compatible with: robotics frames, automation fixtures, 3D printers, electronic test jigs, precision instruments, and general DIY mechanical assemblies.
✅ Key Features of These 304 Stainless Steel Compression Springs
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304 stainless steel construction — excellent corrosion resistance in humid, mildly acidic, and outdoor environments
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Wide dimensional range — wire dia 0.2–0.4 mm, OD 1.5–10 mm, free length 5–50 mm; select exact spec from variant options
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10 pieces per pack — ideal for prototyping, small-batch production, and replacement stock
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Helical coil wound to consistent pitch — uniform spring rate and predictable deflection behavior
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Suitable for robotics, automation, 3D printing, electronic fixtures, and precision DIY projects
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Multiple size combinations available — mix wire diameter, outside diameter, and length to match your design spec
📐 Technical Specifications — 304 Stainless Steel Compression Springs
| Material |
304 Stainless Steel |
| Wire Diameter |
0.2 mm / 0.25 mm / 0.3 mm / 0.4 mm (see variant options) |
| Outside Diameter (OD) |
1.5 / 2 / 2.5 / 3 / 4 / 5 / 6 / 7 / 8 / 9 / 10 mm (see variant options) |
| Free Length |
5 / 10 / 15 / 20 / 25 / 30 / 35 / 40 / 45 / 50 mm (see variant options) |
| Spring Type |
Helical Compression |
| Quantity per Pack |
10 pcs |
| Spring Rate |
See variant options |
| Surface Finish |
Bright (natural stainless) |
| End Type |
See variant options |
| Weight |
See variant options |
❓ Frequently Asked Questions
How do I select the right spring size for my application?
Choose your Wire Diameter first (thicker wire = higher spring rate), then select an Outside Diameter that fits your bore or housing, and finally pick a Free Length that gives you the travel and preload you need. Use the three variant dropdowns above to configure your exact specification.
Is 304 stainless steel strong enough for my compression spring application?
304 stainless steel offers a good balance of tensile strength, corrosion resistance, and workability for most light-to-medium load applications. For very high-cycle fatigue or high-load environments, consider 316 or music wire alternatives. For robotics, 3D printers, and precision instruments, 304 is typically sufficient.
Will these springs rust or corrode?
304 stainless steel provides excellent resistance to rust and corrosion in most indoor, humid, and mildly corrosive environments. It is not recommended for prolonged exposure to chloride-rich environments (e.g., saltwater immersion) without additional protection.
Are these springs compatible with my 3D printer or robotic gripper?
These springs are widely used in 3D printer extruder tensioners, bed-leveling assemblies, and robotic gripper finger mechanisms. Select the OD and length that match your design's bore diameter and required travel. If unsure, contact us to confirm compatibility.
Can I buy a single spring or only in packs of 10?
These springs are sold in packs of 10 pieces per order. This pack size is ideal for prototyping, small-batch production runs, and keeping replacement stock on hand.
What is the difference between wire diameter and outside diameter?
Wire diameter refers to the thickness of the steel wire used to wind the spring coil. Outside diameter (OD) is the total outer width of the coiled spring body. Inside diameter (ID) = OD minus 2× wire diameter. Always check both dimensions when sizing a spring to fit a shaft or bore.
How accurate are the dimensions listed?
Dimensions are nominal manufacturing specifications. Actual parts may have standard manufacturing tolerances of ±0.05–0.1 mm depending on the size. For tight-tolerance applications, please contact us to confirm before ordering.
🛒 Select your Wire Diameter, Outside Diameter, and Length above, then add to cart.
