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Home / Screws / Jinchao Aluminum Alloy Hex Socket Bolt Cup Head Screw Internal Hexagon Bolt Fastener Extended M5 M6 M8 M10

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material 6061 Aluminum Alloy
Head Style Cup Head (Button Head)
Drive Type Internal Hexagon (Allen)
Available Sizes M5, M6, M8, M10
Thread Pitch Standard Coarse Thread
Surface Finish Anodized Black/Silver
Tensile Strength High Strength Grade
Application Machinery, Automotive, DIY Projects
Corrosion Resistance Excellent
Package Contents Assorted Kit with Storage Box

6 reviews

A

Anonymous

Mar 28, 2026

Rating: 4/5

Good quality, fast shipping

The finish is very smooth and consistent. I used the M6 size for a custom bike part. Only minor issue was the box labeling could be clearer.

A

Anonymous

Mar 26, 2026

Rating: 5/5

Exceeded expectations

Very professional looking hardware. The cup head provides a nice low profile finish. Will definitely buy again for future projects.

A

Anonymous

Mar 11, 2026

Rating: 5/5

Lightweight and strong

Switched from steel to these aluminum alloy bolts to reduce weight on my drone frame. They hold up well under vibration and stress.

A

Anonymous

Mar 06, 2026

Rating: 5/5

Great assortment

Having multiple sizes in one kit is super convenient. The anodized coating seems durable and hasn't scratched easily during installation.

A

Anonymous

Mar 01, 2026

Rating: 5/5

Perfect for my CNC project

These aluminum bolts are exactly what I needed. The cup head looks sleek and the internal hex drive fits my tools perfectly without stripping.

A

Anonymous

Mar 01, 2026

Rating: 4/5

Solid fasteners

Used these for assembling a 3D printer frame. Threads are clean and engage smoothly. Would recommend for general mechanical use.

5 FAQ

Q: Do you sell replacement storage boxes?

A: Currently, the storage box is only included with the full assorted kit and is not sold separately. However, the bolts are standard sizes and fit most generic hardware organizers.

Q: What Allen key size do I need for the M8 bolt?

A: For the M8 cup head socket bolt, you will typically need a 6mm Allen key. Please check the specific product listing for exact dimensions.

Q: Is the thread metric or imperial?

A: All bolts in this series feature standard metric threads (M5, M6, M8, M10) as indicated by the product naming convention.

Q: Can these handle high torque applications?

A: While aluminum alloy is strong, it is not as strong as hardened steel. These are best for medium-load applications. For critical high-torque structural uses, we recommend steel fasteners.

Q: Are these bolts suitable for outdoor use?

A: Yes, the anodized aluminum alloy provides excellent corrosion resistance, making them suitable for most outdoor applications, though extreme marine environments may require additional protection.

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