Black Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs Steel
Black Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs Steel
Black Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs Steel
Black Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs Steel
Black Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs Steel
Black Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs Steel
Black Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs Steel
Black Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs Steel
Black Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs Steel
Black Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs Steel
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Black Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs SteelBlack Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs SteelBlack Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs SteelBlack Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs SteelBlack Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs SteelBlack Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs SteelBlack Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs SteelBlack Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs SteelBlack Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs SteelBlack Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs Steel

Black Compression Spring 1.2mm Wire Diameter 10-50mm Length Small Springs Steel

HomeDIYer
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By HomeDIYer®

Price:
$5.83 USD
Stock:
In stock (500 units), ready to be shipped

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Description

Black Compression Springs — 1.2mm Wire Diameter, Reliable Return Force for Every Build

When a project demands consistent push-back force in a tight space, finding the right small compression spring can be frustrating. Makers, electronics hobbyists, and mechanical engineers who work with compact assemblies need springs that hold their rated dimensions, resist corrosion, and arrive ready to install — not springs that collapse under load or vary wildly from piece to piece. These black compression springs are designed for exactly that use case.

Each spring is wound from steel wire with a diameter of 1.2mm (approximately 0.047 in) and finished with a black oxide coating for added corrosion resistance. The outer diameter ranges from 6mm to 9mm (approx. 0.24–0.35 in), and the free length spans 10mm to 50mm (approx. 0.39–1.97 in) across the available variants. Both ends are closed and ground flat to ensure stable seating and consistent load distribution.

These springs suit a wide range of applications: replacing worn return springs in mechanical keyboards and switches, providing preload in sensor housings and probe assemblies, acting as ejector springs in 3D-printer extruder mechanisms, and serving as cushion elements in small jigs and fixtures. The black oxide finish also makes them a clean visual choice for exposed spring positions in consumer electronics prototypes and maker projects.

⚙️ Compatibility: Suitable for spring-loaded mechanisms, electronic assemblies, DIY jigs, and mechanical prototypes requiring an outer diameter of 6–9mm and free length of 10–50mm. Verify bore/housing diameter before ordering.

✅ Key Features of These Black Compression Springs

🔩 1.2mm Steel Wire Diameter

Consistent 1.2mm wire gauge across all variants ensures predictable spring rate and reliable deflection behavior in precision assemblies.

🎨 Black Oxide Finish

The black surface treatment provides a layer of corrosion resistance and a clean, uniform appearance suitable for visible spring positions.

📐 Wide Size Range — OD 6–9mm, Length 10–50mm

36 size combinations let you match the exact spring geometry your design requires without custom fabrication.

🔄 Closed and Ground Ends

Flat-ground end coils seat squarely against mating surfaces, reducing lateral buckling and improving load alignment in confined bores.

📦 Flexible Pack Quantities

Available in packs of 10, 20, 50, 80, and 100 pieces — order just enough for a prototype or stock up for production runs.

🛠️ Broad Application Compatibility

Fits mechanical keyboards, sensor probes, 3D-printer extruders, jig fixtures, and any compact mechanism needing a reliable return force.

📐 Technical Specifications — Compression Springs

Wire Diameter 1.2mm (approx. 0.047 in)
Outer Diameter (OD) 6mm / 7mm / 8mm / 9mm (approx. 0.24–0.35 in)
Free Length 10mm – 50mm (approx. 0.39–1.97 in)
Material Steel
Surface Finish Black oxide coating
End Type Closed and ground
Spring Rate See variant options
Load Capacity See variant options
Pack Quantity 10 / 20 / 50 / 80 / 100 pcs

❓ Frequently Asked Questions

How do I choose the right outer diameter for my application?

Measure the inner diameter of the bore or housing where the spring will sit. The spring's outer diameter should be slightly smaller than the bore — typically 0.2–0.5mm of clearance — to allow free compression without binding. For a guide rod application, the spring's inner diameter (OD minus 2× wire diameter) should be slightly larger than the rod.

What free length should I select?

Choose a free length that is longer than your required working length. The difference between the free length and the compressed (working) length is the available deflection. As a general rule, avoid compressing a spring beyond 80% of its free length to prevent coil bind and premature fatigue.

How strong are these springs — what load can they handle?

Spring rate and maximum load depend on the specific OD and length combination. Shorter springs with smaller OD and the same wire diameter will have a higher spring rate (stiffer). If you need exact load data for your variant, please contact us to confirm before ordering.

Are these springs corrosion-resistant?

The black oxide finish provides moderate corrosion resistance suitable for indoor and dry environments. For applications exposed to moisture, chemicals, or outdoor conditions, consider additional protective measures such as light lubrication or a stainless steel alternative.

Can I use these springs in mechanical keyboards or switch modifications?

Yes. The 1.2mm wire diameter and 6–9mm OD range are compatible with many spring-loaded switch and keyboard mechanisms. Verify the housing bore diameter and required actuation force against the spring's free length and estimated spring rate for your chosen variant before installing.

What is the difference between the OD 6mm, 7mm, 8mm, and 9mm variants?

All four share the same 1.2mm wire diameter, so the key difference is the outer diameter and the resulting inner diameter (ID = OD − 2 × wire diameter). A 6mm OD spring has an ID of approximately 3.6mm, while a 9mm OD spring has an ID of approximately 6.6mm. Select based on your bore size or guide rod diameter.

How many springs do I need to order?

Pack sizes of 10, 20, 50, 80, and 100 pieces are available. For prototyping or single-unit repairs, a pack of 10 is usually sufficient. For small production runs or stocking a workshop, packs of 50 or 100 offer better per-unit value.

🛒 Select your wire diameter × outer diameter × length and quantity above, then add to cart.

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