A
Anonymous
Apr 11, 2026
Rating: 4/5
Good value bulk pack
Most were perfect, one had a slight burr but usable. Overall good value.
Description
Fully Threaded 12.9 Grade High-Strength Socket Head Cap Screws Cylinder Head Bolts M1.6 M4 M5 M6 M8-M20
Reviews
Attributes
| 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 |
| Drive Type | Internal Hex |
| Surface Finish | Black Oxide |
| Measurement System | Metric |
| Tensile Strength | 1220 MPa Min |
| Hardness | 39-44 HRC |
| Compliance Standard | ISO 4762 |
5 reviews
A
Anonymous
Apr 08, 2026
Rating: 5/5
High quality steel
Very strong bolts. Exactly what I needed for high tension applications.
A
Anonymous
Mar 26, 2026
Rating: 5/5
Consistent sizing
Measured with calipers, all within tolerance. Will reorder for future projects.
A
Anonymous
Feb 13, 2026
Rating: 5/5
Perfect for machinery repair
Used these for a CNC repair. Threads are clean and head didn't strip under torque.
A
Anonymous
Jan 29, 2026
Rating: 5/5
Fast shipping
Needed these urgently for a project. Arrived on time and well packaged.
5 FAQ
Q: Are they corrosion resistant for outdoor use?
A: They have a black oxide finish which offers mild protection. Use oil for outdoor use.
Q: Is the head height standard ISO dimensions?
A: Yes, these comply with ISO 4762 standard head dimensions.
Q: What is the recommended torque specification?
A: Torque varies by size and lubrication. Please refer to a Grade 12.9 torque chart.
Q: Are these metric or imperial sizes?
A: These are metric sizes ranging from M1.6 to M20.
Q: Do you sell matching nuts for these bolts?
A: Yes, we sell Grade 12.9 matching nuts separately in our store.
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