Y Type Compression Spring Wire Dia.=1mm OD=9mm~12mm A2 Stainless Steel Spring

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Y Type Compression Spring Wire Dia.=1mm OD=9mm~12mm A2 Stainless Steel Spring

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By HomeDIYer®

Wire Diameter: 1 mm

Item Diameter: 9 mm

Item Length & Size (Qty): 10mm & 1x9x10mm (10 pcs)

Price:

$3.73 USD

Stock:

In stock (500 units), ready to be shipped

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Y Type Compression Spring — 1mm Wire, OD 9–12mm, A2 Stainless Steel

When a standard spring fails to fit a tight bore or a compact mechanism, engineers and DIY builders alike face the same frustration: sourcing a small-diameter compression spring that actually matches the spec. These Y Type compression springs are designed for makers, repair technicians, and small-batch manufacturers who need reliable elastic return force in confined spaces — without compromising on corrosion resistance.

Each spring is formed from A2 (304) stainless steel wire with a diameter of 1 mm (0.039 in). The outer diameter (OD) ranges from 9 mm to 12 mm (approx. 0.35 in to 0.47 in), and the free length spans from 10 mm to 305 mm (approx. 0.39 in to 12.0 in) depending on the variant selected. The Y-type end configuration provides stable seating on flat surfaces without additional retainers.

Typical use cases include precision instrument assemblies requiring a small-OD compression spring for return actuation, electronics enclosure latches and button mechanisms needing a stainless steel miniature spring, and light-load valve or plunger applications in food-contact or humid environments where corrosion resistance is critical.

🔩 Compatibility: Suitable for spring bores of 9–12 mm OD clearance. Wire diameter 1 mm. Verify free length and spring rate against your application before ordering.

✅ Key Features of These Y Type Compression Springs

🧲 A2 Stainless Steel Construction

Made from A2 (304) stainless steel wire, offering solid resistance to rust, oxidation, and mild chemical exposure — suitable for indoor and outdoor applications.

📐 Precise 1mm Wire Diameter

Consistent 1 mm wire cross-section across all variants ensures predictable spring rate and reliable coil geometry for repeatable performance.

🔄 Wide OD Range: 9mm to 12mm

Four outer diameter options (9 mm, 10 mm, 11 mm, 12 mm) let you match the spring to your bore or housing without custom tooling.

📏 Multiple Free Lengths Available

Free lengths from 10 mm up to 305 mm (0.39 in – 12.0 in) cover a broad range of stroke and preload requirements in a single product family.

📦 Flexible Pack Quantities

Available in packs of 1, 2, 5, 10, 20, and 50 pieces — order the exact quantity you need for prototyping, repair, or small-batch production.

🏭 Y-Type End Configuration

The Y-type (open-end) coil design seats flat against mating surfaces, reducing the need for additional spring retainers in most standard assemblies.

📐 Technical Specifications — Y Type Compression Spring

Material	A2 Stainless Steel (304)
Wire Diameter	1 mm (0.039 in)
Outer Diameter (OD)	9 mm / 10 mm / 11 mm / 12 mm (see variant options)
Free Length	10 mm – 305 mm (see variant options)
End Type	Y-Type (Open End)
Spring Rate	See variant options
Surface Finish	Natural stainless (no coating)
Pack Quantity	1 / 2 / 5 / 10 / 20 / 50 pcs (see variant options)
Operating Temperature	Typically –20°C to +200°C (–4°F to +392°F)
Corrosion Resistance	A2 stainless — suitable for humid and mildly corrosive environments

❓ Frequently Asked Questions

How do I choose the right OD and length for my application?

Measure the inner diameter of your bore or housing and select an OD that provides 0.5–1 mm clearance (e.g., use a 9 mm OD spring in a 10 mm bore). For free length, choose a spring that is 10–20% longer than your required compressed length to ensure adequate preload and travel.

What is the load capacity of these springs?

Load capacity depends on the specific OD and free length combination. With a 1 mm wire diameter, these springs are designed for light-duty applications — typically in the range of a few Newtons to tens of Newtons depending on the variant. Contact us if you need spring rate data for a specific size.

Are these springs corrosion-resistant enough for outdoor or wet environments?

Yes. A2 (304) stainless steel provides solid resistance to rust and oxidation in most outdoor, humid, and mildly corrosive environments. For highly aggressive chemical or saltwater exposure, A4 (316) stainless would be more appropriate — please contact us if you need that grade.

What does "Y Type" mean for compression springs?

"Y Type" refers to the end configuration of the spring coil. These springs have open (unground) ends that form a Y-like profile when viewed from the end. This design seats stably on flat surfaces and is suitable for most standard compression spring applications without requiring special retainers.

Can I use these springs in food-contact or medical equipment?

A2 stainless steel is commonly used in food-processing equipment due to its corrosion resistance. However, suitability for specific regulated applications (medical devices, direct food contact) depends on your local compliance requirements. We recommend verifying material certifications with your regulatory body before use.

Which pack size should I order for prototyping vs. production?

For prototyping or repair, the 1–5 piece packs offer the lowest per-order cost with minimal waste. For small-batch production runs, the 10–50 piece packs provide a lower per-unit cost. Select the quantity that matches your build volume to optimize your spend.

Are all OD and length combinations available in every pack quantity?

Pack quantity availability varies by OD and length. Shorter lengths (10–50 mm) are generally available in 10, 20, and 50-piece packs, while longer lengths (60–305 mm) are available in smaller quantities (1, 2, 5, or 10 pieces). Use the variant selectors above to see available combinations.

🛒 Select your Wire Diameter, Item Diameter, and Item Length & Size (Qty) above, then add to cart.