Description
Reviews
| Brand | - |
| Category | Industrial Small Parts / Connectors and Fasteners |
| Origin | - |
| Material | Alloy Steel |
| Strength Grade | 12.9 |
| Surface Finish | Black Oxide |
| Head Type | Socket Head Cap |
| Drive Style | Internal Hex |
| Thread Type | Metric Coarse |
| Size Range | M2, M2.5, M3, M4, M5, M6, M8, M10, M12, M14, M16, M20 |
| Tensile Strength | 1220 MPa (Minimum) |
| Hardness | 39-44 HRC |
| Compliance Standard | DIN 912 / ISO 4762 |
Anonymous
Mar 30, 2026
Rating: 5/5
Top Quality Bolts
These screws held up perfectly under high tension in my machinery assembly. The black oxide finish looks professional and the threads are cut very cleanly.
Anonymous
Mar 01, 2026
Rating: 5/5
Perfect for CNC
Used for mounting components on my CNC router. The head height is consistent and they sit flush in the counterbores.
Anonymous
Feb 28, 2026
Rating: 4/5
Great Strength
Very strong fasteners as expected from Grade 12.9. Only giving 4 stars because the packaging was slightly damaged during shipping, but the bolts were fine.
Anonymous
Jan 30, 2026
Rating: 5/5
Reliable Supply
Consistent quality across different sizes. I ordered a mix of M4 and M8 and both batches met the specifications.
Anonymous
Jan 29, 2026
Rating: 5/5
Precise Threading
No issues with stripping during installation. I used the M6 size for a custom jig and they tightened smoothly without binding.
Q: Do you offer M24 sizes in this grade?
A: Currently, this listing supports sizes from M2 to M20. Please contact us directly for inquiries regarding larger diameters.
Q: What hex key size is required for the M6 bolts?
A: For M6 Socket Head Cap Screws, a 5mm hex key is typically required according to DIN 912 standards.
Q: Are these suitable for outdoor applications?
A: The black oxide finish provides mild corrosion resistance. For harsh outdoor environments, we recommend applying additional coating or grease.
Q: What is the approximate yield strength for these screws?
A: For Grade 12.9 alloy steel, the yield strength is typically around 1100 MPa. Please refer to the technical datasheet for specific size variations.
Q: Is a material certificate available with purchase?
A: Yes, mill certificates are available upon request for bulk orders. Please message us after placing your order.
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