Description
Reviews
| Brand | - |
| Category | Industrial Small Parts / Connectors and Fasteners |
| Origin | - |
| Material | Alloy Steel |
| Strength Grade | 12.9 |
| Thread Style | Full Thread |
| Head Type | Hex Socket Cap |
| Surface Finish | Black Oxide |
| Metric Sizes | M4, M5, M6, M8, M10, M12 |
| Drive Type | Internal Hex |
| Compliance Standard | ISO 4762 |
| Hardness | HRC 39-44 |
| Package Quantity | 100 Pieces |
Anonymous
Mar 31, 2026
Rating: 4/5
Good value bulk pack
Great bolts for the price. One box had a slight variance in coating color but functionality is fine.
Anonymous
Mar 18, 2026
Rating: 5/5
Reliable fasteners
I use these for automotive brackets. They hold up well under vibration and stress.
Anonymous
Feb 24, 2026
Rating: 5/5
Exact specifications
Measured the dimensions and they meet ISO standards precisely. Will order again.
Anonymous
Feb 05, 2026
Rating: 5/5
High quality steel
Very satisfied with the hardness. No stripping on the hex heads during high torque application.
Anonymous
Feb 04, 2026
Rating: 5/5
Perfect for machinery repair
Used these for restoring an old lathe. The strength is exactly as advertised and the threads are clean.
Q: Are these suitable for outdoor use?
A: They have a black oxide finish which offers mild corrosion resistance. For harsh outdoor environments, we recommend applying additional coating.
Q: What is the yield strength of grade 12.9?
A: Grade 12.9 typically has a minimum yield strength of 1100 MPa. Please consult engineering tables for specific load calculations.
Q: Are the threads coarse or fine?
A: These screws feature standard coarse threads according to ISO metric standards.
Q: Is a mill certificate available?
A: Yes, material certification is available upon request for bulk orders. Please contact us directly.
Q: Do you sell the matching hex keys?
A: Hex keys are sold separately in our tools section. Please search for metric hex key sets.
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