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Home / Connectors and Fasteners / Grade 12.9 High-Strength Round Head Hex Socket Screw Pan Head Screw Semi-Round Cup Bolt M2 M3 M4 M5 M10 M16
Connectors and Fasteners

Attributes

Brand -
Category Industrial Small Parts / Connectors and Fasteners
Origin -
Material Alloy Steel
Strength Grade 12.9
Head Shape Pan Head
Drive Style Hex Socket
Thread Standard Metric (ISO)
Available Sizes M2, M3, M4, M5, M6, M8, M10, M12, M14, M16
Surface Finish Black Oxide
Yield Strength 1100 MPa
Heat Treatment Quenched and Tempered
Country of Origin Imported

5 reviews

A

Anonymous

Apr 09, 2026

Rating: 5/5

Perfect Fit

Ordered M6 size. Threads were clean and matched my nuts exactly. Will order again.

A

Anonymous

Mar 27, 2026

Rating: 5/5

Excellent Quality

These screws are incredibly strong. Used them for a high-tension assembly and they held perfectly without stripping.

A

Anonymous

Mar 03, 2026

Rating: 4/5

Good Value

Product is great, but the box was slightly dented upon arrival. Screws were fine though.

A

Anonymous

Feb 18, 2026

Rating: 5/5

Strong Stuff

Definitely feel the difference compared to grade 8.8 bolts. Worth the extra cost for critical jobs.

A

Anonymous

Jan 30, 2026

Rating: 5/5

Consistent Batch

We order these monthly for production. Quality remains consistent across batches.

5 FAQ

Q: Are these metric or imperial?

A: These are metric sizes ranging from M2 to M16.

Q: Do you offer bulk discounts?

A: Yes, pricing tiers are applied automatically at checkout for larger quantities.

Q: What hex key size do I need for M8?

A: For M8 screws, you will typically need a 6mm hex key.

Q: Are these suitable for outdoor use?

A: Black oxide offers mild corrosion resistance. For harsh outdoor environments, we recommend stainless steel.

Q: Can I buy mixed sizes?

A: This listing is for specific sizes. Please select the desired size from the dropdown menu.

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