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When a mechanism fails because a tiny spring loses tension or corrodes, the entire assembly pays the price. Engineers, makers, and repair technicians who work with compact actuators, jigs, fixtures, and electronic enclosures need compression springs they can count on — springs that hold their load rating across hundreds of thousands of cycles without rust or fatigue. These 304 stainless steel compression springs are built for exactly that demand.
Each spring is wound from 304-grade stainless steel wire in 0.7 mm or 0.8 mm diameters (approximately 0.028 in or 0.031 in). Outer diameters range from 5 mm to 14 mm (approx. 0.20 in to 0.55 in) and free lengths span 5 mm to 100 mm (approx. 0.20 in to 3.94 in), giving you a broad selection matrix to match your exact bore and travel requirements. Sold in packs of 5 or 10 pieces depending on the variant.
Typical use cases include small compression spring for electronics enclosure latches, miniature return spring for CNC limit-switch plungers, stainless steel pressure spring for 3D-printer extruder tensioners, and replacement compression spring for hobby robotics and automation fixtures. The corrosion-resistant alloy also makes these springs suitable for light-duty outdoor or humid-environment assemblies where carbon steel would degrade.
Wound from 304-grade stainless steel for solid corrosion resistance in humid, light-chemical, and outdoor environments where carbon steel springs would rust and weaken.
Wire diameters of 0.7 mm and 0.8 mm combined with outer diameters from 5 mm to 14 mm and free lengths from 5 mm to 100 mm let you find the exact spring geometry your design requires.
Uniform coil pitch and wire cross-section across each batch ensure repeatable deflection behavior, critical for precision jigs, sensors, and actuator return mechanisms.
Small OD range (5–14 mm) and fine wire diameters make these springs ideal for tight-clearance assemblies in electronics, robotics, and miniature mechanical devices.
Available in packs of 5 or 10 pieces per order, giving you spares for prototyping, repair kits, or small-batch production without over-ordering bulk quantities.
Used in CNC limit-switch plungers, 3D-printer extruder tensioners, electronic enclosure latches, hobby robotics, and general DIY automation fixtures requiring a reliable small pressure spring.
| Material | 304 Stainless Steel |
|---|---|
| Wire Diameter | 0.7 mm / 0.8 mm (approx. 0.028 in / 0.031 in) |
| Outer Diameter (OD) | 5 mm – 14 mm (approx. 0.20 in – 0.55 in) — See variant options |
| Free Length | 5 mm – 100 mm (approx. 0.20 in – 3.94 in) — See variant options |
| Spring Type | Compression (open coil) |
| End Type | Closed ends (typically ground or plain — See variant options) |
| Spring Rate | See variant options |
| Surface Finish | Natural stainless (no coating) |
| Pack Quantity | 5 pcs or 10 pcs — See variant options |
| Weight | See variant options |
The wire diameter determines the spring's stiffness and load capacity. A 0.8 mm wire produces a stiffer spring with a higher load rating than a 0.7 mm wire of the same OD and length. If your application requires a firmer return force or higher compression load, choose 0.8 mm. For lighter-duty or more delicate mechanisms, 0.7 mm is typically the better fit. Always calculate or test the spring rate against your required deflection and load before finalizing your selection.
The outer diameter must fit inside your bore or housing with adequate clearance — typically 0.5–1 mm of radial clearance is recommended. The free length should be longer than your required compressed length plus the desired preload travel. Use the variant selector to choose the Wire Diameter × OD × Length combination that matches your bore ID and stroke requirements. If you are unsure, contact us to confirm before ordering.
Yes. 304 stainless steel offers solid resistance to atmospheric corrosion, moisture, and mild chemical exposure, making these springs suitable for light-duty outdoor assemblies, humid enclosures, and environments where carbon steel springs would rust. For highly aggressive chemical or saltwater environments, 316 stainless steel would be a more appropriate choice.
Yes. These small stainless steel compression springs are commonly used in 3D-printer extruder tensioners, bed-leveling assemblies, and CNC limit-switch plungers. Select the OD and length that matches your printer or machine's spring pocket dimensions. The consistent coil pitch ensures repeatable deflection, which is important for accurate tensioning and switch actuation.
Load capacity depends on the specific wire diameter, OD, free length, and number of active coils of the variant you select. As a general guide, 0.7–0.8 mm wire springs in the 5–14 mm OD range are designed for light to medium loads, typically in the range of a few Newtons to tens of Newtons at working deflection. For exact spring rate and load data for a specific size, contact us to confirm.
Smaller or longer springs (typically free length above 50–60 mm) are offered in 5-piece packs, while shorter springs are available in 10-piece packs. The pack size is shown in the Amount (PCS) variant option. Choose the quantity that suits your project — 10-piece packs are ideal for prototyping or repair kits, while 5-piece packs are practical for larger or longer spring variants where fewer pieces are needed per application.
These springs are designed to standard coil spring geometry and are compatible with most spring housings, plunger assemblies, and spring-loaded mechanisms that accept the corresponding OD. Always verify the OD, free length, and wire diameter against your housing specifications. The inner diameter (ID) can be estimated as OD minus twice the wire diameter — for example, a 0.7×8mm spring has an approximate ID of 6.6 mm.
