0.8mm Wire Compression Spring — Consistent Load Control in A2 Stainless Steel
When a mechanism fails because a spring loses tension or corrodes in a damp environment, the cost is more than just the part — it's downtime, rework, and frustration. Engineers, makers, and repair technicians who need a reliable 0.8mm wire diameter compression spring with predictable deflection behavior will find this series purpose-built for exactly that challenge.
Each spring is formed from A2 stainless steel (equivalent to 304 grade) wire with a diameter of 0.8mm. The outer diameter spans 6mm to 9mm, and the free length ranges from 10mm to 305mm (approximately 0.39 in to 12.0 in), covering a wide range of travel and load requirements. End coils are closed and ground for flat, stable seating.
Typical applications include electronic enclosure latches requiring a light return force, precision instrument mechanisms where consistent spring rate matters, small valve assemblies in fluid handling equipment, and DIY robotics or automation projects needing compact compression elements with corrosion resistance.
🔩 Compatibility: Suitable for spring seats, bores, and guide pins sized to match the selected outer diameter. Verify free length and spring rate against your load requirements before ordering.
✅ Key Features of These 0.8mm Wire Compression Springs
🦾
A2 Stainless Steel Construction — Formed from 304-equivalent stainless wire for reliable corrosion resistance in humid, wet, or mildly acidic environments where carbon steel springs would degrade.
📐
Wide Size Range in One Listing — Outer diameters from 6mm to 9mm and free lengths from 10mm to 305mm let you source multiple spring sizes from a single trusted listing without juggling multiple suppliers.
⚙️
0.8mm Wire Diameter for Light-to-Medium Loads — The 0.8mm wire gauge delivers a spring rate suited to light return-force applications, small valve mechanisms, and precision instrument assemblies where over-springing would cause functional issues.
🔄
Closed and Ground Ends — End coils are closed and ground flat, providing a stable, perpendicular seating surface that reduces lateral buckling and ensures consistent load transfer across the spring's full travel.
📦
Flexible Pack Sizes — Available in quantities of 1, 5, 10, 20, 50, 100, and 200 pieces so you can order a single prototype spring or stock up for production runs without paying for more than you need.
🧪
Dimensionally Consistent Across Variants — Each size is manufactured to consistent wire diameter and coil geometry tolerances, so springs of the same variant perform predictably batch to batch — important for any repeatable assembly process.
📐 Technical Specifications — Compression Springs
| Material |
A2 Stainless Steel (304 equivalent) |
| Wire Diameter |
0.8 mm (0.031 in) |
| Outer Diameter Range |
6 mm – 9 mm (0.24 in – 0.35 in) |
| Free Length Range |
10 mm – 305 mm (0.39 in – 12.0 in) |
| End Type |
Closed and Ground |
| Spring Direction |
Right-hand wound (standard) |
| Spring Rate |
See variant options |
| Maximum Load |
See variant options |
| Surface Finish |
Natural stainless (no coating) |
| Pack Size Options |
1 / 5 / 10 / 20 / 50 / 100 / 200 pcs |
❓ Frequently Asked Questions
How do I choose the right outer diameter and length for my application?
Start with the bore or guide pin diameter in your assembly. The spring's outer diameter should be slightly smaller than the bore (typically 0.2–0.5mm clearance) or slightly larger than the guide pin. For free length, choose a spring that is longer than your required compressed length plus the desired travel distance. If you are unsure, order a small pack of two or three candidate sizes to test fit before committing to a larger quantity.
What load can a 0.8mm wire diameter compression spring handle?
The load capacity depends on the specific outer diameter and free length of the variant you select. As a general guide, 0.8mm wire springs in this OD range are suited to light-to-medium return-force applications — typically in the range of a few Newtons to tens of Newtons depending on deflection. For precise spring rate and maximum load values for a specific size, contact us to confirm before ordering for load-critical applications.
Are these springs corrosion-resistant enough for outdoor or wet environments?
Yes. A2 stainless steel (304 grade equivalent) provides good resistance to atmospheric corrosion, fresh water, and mild chemical exposure. It is suitable for outdoor enclosures, marine-adjacent environments, food-adjacent equipment, and humid indoor settings. For highly aggressive environments involving chlorides, salt spray, or strong acids, A4 (316) stainless steel would be a more appropriate choice.
What does "closed and ground" ends mean, and why does it matter?
Closed ends means the final coil is wound tightly against the adjacent coil, creating a solid end rather than an open helix. Ground ends means the closed end coil is then machined flat and perpendicular to the spring axis. Together, these features provide a stable, flat seating surface that distributes load evenly, reduces lateral deflection (buckling), and ensures the spring sits squarely in its seat — important for consistent performance in precision assemblies.
Are these springs compatible with standard spring seats and guide pins?
These springs are designed to standard coil geometry and are compatible with spring seats and guide pins sized to match the selected outer diameter. For bore-guided installations, the bore should be approximately 0.2–0.5mm larger than the spring OD. For pin-guided installations, the pin diameter should be approximately 0.2–0.5mm smaller than the spring's inner diameter (which equals OD minus twice the wire diameter, so approximately 4.4mm to 7.4mm depending on the variant selected).
How do I decide between ordering a small pack versus a larger quantity?
If you are prototyping or testing a design, start with a pack of 5 or 10 to validate the size and spring rate before committing to larger quantities. For production runs or stocking a workshop, packs of 50, 100, or 200 offer a lower per-unit cost. The 305mm length variants are also available in single-piece quantities, which is useful when you need to cut springs to a custom length for a specific application.
Can I cut these springs to a shorter length?
Yes, stainless steel compression springs can be cut to a shorter free length using a rotary cutting tool or spring cutter. After cutting, the cut end will be open rather than ground flat. For non-critical applications this is acceptable; for precision assemblies, you may need to dress the cut end. Note that cutting changes the spring rate and load characteristics, so recalculate or test after cutting.
🛒 Select your Wire Dia x Outer Dia x Length and Pack Size above, then add to cart.
