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Home / Screws / 304 Stainless Steel Socket Head Cap Screw Cylinder Head Cup Head Extended Bolt M2 M3 M4 M5 M6 M8 M10 M12

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material 304 Stainless Steel
Head Style Socket Head Cap (Cylinder/Cup)
Drive Type Internal Hex (Allen)
Thread Standard Metric Coarse
Available Sizes M2, M3, M4, M5, M6, M8, M10, M12
Finish Polished Silver
Hardness Grade A2-70
Corrosion Resistance High (Suitable for damp environments)
Package Contents Assorted Kit with Storage Box
Application Machinery, Electronics, Furniture Assembly

6 reviews

A

Anonymous

Mar 26, 2026

Rating: 5/5

Perfect fit for my project

These screws are exactly what I needed for my 3D printer assembly. The 304 stainless steel feels very durable and the hex heads didn't strip even under high torque.

A

Anonymous

Mar 25, 2026

Rating: 5/5

Great value kit

Having all these sizes in one box is so convenient. The storage case keeps them organized, and the price is unbeatable compared to buying individual packs.

A

Anonymous

Mar 24, 2026

Rating: 5/5

Excellent corrosion resistance

I used these for an outdoor garden fixture. After three months of rain and sun, there is absolutely no sign of rust. Highly recommend for outdoor use.

A

Anonymous

Mar 13, 2026

Rating: 5/5

Professional grade quality

As a mechanical engineer, I appreciate the consistent machining on these cap screws. The head height is uniform, and the finish is smooth.

A

Anonymous

Mar 12, 2026

Rating: 4/5

Good quality, slight size variance

Overall great set. The M4 and M6 sizes were perfect, but a couple of the M3 bolts seemed slightly shorter than standard. Still usable for most applications.

A

Anonymous

Mar 10, 2026

Rating: 3/5

Decent but threads could be sharper

The material is good, but I found the threads on the M8 bolts were a bit hard to start without a tap. Once started, they tightened fine.

5 FAQ

Q: Can these withstand high temperatures?

A: 304 Stainless Steel maintains its strength up to approximately 870°C (1600°F) for intermittent service, making them suitable for most engine bay or machinery applications.

Q: Is the thread full length or partial?

A: For sizes M2 through M6, the threads are typically full length. For M8 and larger, the threads are partial according to ISO 4762 standards.

Q: Do you sell a matching hex key tool with this?

A: The kit does not include tools, but standard metric hex keys (Allen wrenches) available at any hardware store will fit these socket heads perfectly.

Q: What is the length range included in this kit?

A: This specific assortment includes lengths ranging from 4mm to 50mm depending on the diameter selected. Please check the detailed size chart in the product images.

Q: Are these screws compatible with aluminum parts?

A: Yes, 304 stainless steel is generally compatible with aluminum, though we recommend using an anti-seize compound to prevent galvanic corrosion in wet environments.

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