Compression Springs Wire Dia 1mm OD 7mm L 10-200mm 304 Stainless Steel Spring

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Compression Springs Wire Dia 1mm OD 7mm L 10-200mm 304 Stainless Steel Spring

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SIZE(CSxODxL): 1x7x10mm

QTY(pcs): 10Pcs

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$3.74 USD

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In stock (500 units), ready to be shipped

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Compression Springs 1mm Wire 7mm OD — Corrosion-Resistant 304 Stainless Steel, 10 to 200mm Lengths

When a project demands reliable spring force in a compact form factor, finding the right compression spring at the right length can be a real bottleneck — especially for robotics builders, automation engineers, and precision DIY makers who need exact specs without ordering custom parts. These 304 stainless steel compression springs are stocked in 18 length options from 10mm to 200mm (0.39 in to 7.87 in), letting you match the exact travel and load requirements of your application without compromise.

Each spring is formed from 1mm (0.039 in) wire diameter 304 stainless steel, with a consistent outer diameter of 7mm (0.276 in). The close-wound coil geometry provides a uniform spring rate across the compression range. Available in multi-piece packs from 2 to 100 pieces depending on the length variant, making them suitable for both prototyping and small-batch production runs.

Typical use cases include return mechanisms in jigs and fixtures, plunger assemblies in pneumatic and mechanical devices, tension-relief components in cable management systems, and precision load-bearing elements in robotics actuators and sensor mounts. Long-tail applications include spring-loaded PCB test probes, battery contact springs, and valve return springs in fluid control assemblies.

🔧 Compatibility: Suitable for standard spring pockets with 7mm OD clearance. Inner diameter is approximately 5mm (0.197 in), accommodating guide pins up to 4.5–5mm. Verify free length and spring rate against your load requirements before ordering.

✅ Key Features of These Compression Springs

🔩304 Stainless Steel Construction
Formed from 304-grade stainless steel wire for reliable corrosion resistance in humid, outdoor, and light chemical environments — far more durable than carbon steel alternatives.

📐Precise 1mm Wire / 7mm OD Dimensions
Wire diameter 1mm (0.039 in), outer diameter 7mm (0.276 in), inner diameter approximately 5mm (0.197 in). Consistent dimensions across all length variants for drop-in interchangeability.

📏18 Length Options: 10mm to 200mm
Choose from 10, 15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 120, 150, 180, and 200mm free lengths to match your exact travel and deflection requirements.

📦Flexible Pack Quantities
Available in packs of 2 to 100 pieces depending on the length variant — ideal for prototyping, small-batch production, and stocking spare parts without over-ordering.

⚙️Close-Wound Coil Geometry
Uniform coil pitch delivers consistent spring rate and predictable load-deflection behavior, critical for precision mechanisms where force repeatability matters.

🛠️Wide Application Range
Suited for return mechanisms, plunger assemblies, valve springs, PCB test probes, battery contacts, robotics actuators, and general-purpose compression spring applications.

📐 Technical Specifications — Compression Springs

Material	304 Stainless Steel
Wire Diameter	1mm (0.039 in)
Outer Diameter (OD)	7mm (0.276 in)
Inner Diameter (ID)	Approx. 5mm (0.197 in)
Free Length Range	10mm – 200mm (0.39 in – 7.87 in)
Available Lengths	10, 15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 120, 150, 180, 200mm
Coil Type	Close-wound compression
Spring Rate	See variant options
Max Load Capacity	See variant options
Surface Finish	Natural stainless (no coating)
Pack Quantity	2 – 100 pcs (varies by length variant)
End Type	See variant options

❓ Frequently Asked Questions

How do I choose the right length for my application?

Measure the available pocket depth and the required compressed length in your assembly. The free length should be long enough to provide the desired preload force when installed. As a general rule, select a free length that is 20–30% longer than your compressed working length to stay within the elastic range of the spring. Use the SIZE(CSxODxL) option above to select your required length.

What is the inner diameter, and what guide pin size fits inside?

The inner diameter is approximately 5mm (0.197 in), calculated as OD minus 2× wire diameter (7mm − 2×1mm = 5mm). Guide pins up to 4.5mm diameter are recommended to allow free spring movement without binding. For tighter fits, contact us to confirm clearance tolerances.

Are these springs corrosion-resistant for outdoor or humid environments?

Yes. 304 stainless steel provides good corrosion resistance against moisture, humidity, and mild chemical exposure. It is suitable for outdoor, marine-adjacent, and light industrial environments. For highly aggressive chemical or saltwater immersion applications, 316 stainless steel would offer superior resistance — contact us if you need that grade.

Can I use these springs in high-temperature applications?

304 stainless steel retains its mechanical properties up to approximately 300°C (572°F) for intermittent use. For continuous elevated-temperature service above 200°C, spring rate and load capacity may decrease. Verify your operating temperature against the spring's rated limits before use in high-heat environments.

Are these compatible with standard spring pockets and housings?

Yes. With a 7mm outer diameter, these springs fit standard 7mm OD spring pockets. Ensure the pocket bore is at least 7.2–7.5mm to allow free compression without side-wall friction. The consistent OD across all length variants means you can swap lengths without redesigning your housing.

How do I decide between ordering a small pack vs. a larger quantity?

For prototyping or one-off builds, packs of 2–10 pieces are cost-effective and reduce waste. For small-batch production runs or stocking spare parts, packs of 50–100 pieces offer a lower per-unit cost. Select your quantity using the QTY(pcs) option above. Larger packs are available for the shorter length variants.

What is the difference between the shorter and longer length variants in terms of spring behavior?

Shorter springs (10–50mm) have a higher spring rate for a given wire and OD combination, meaning they require more force per mm of compression. Longer springs (60–200mm) have a lower spring rate and greater total travel, making them suitable for applications requiring softer, longer-stroke force profiles. If you need a specific spring rate value, contact us to confirm before ordering.

🛒 Select your SIZE(CSxODxL) and QTY(pcs) above, then add to cart.