Description
Reviews
| Brand | - |
| Category | Industrial Small Parts / Connectors and Fasteners |
| Origin | - |
| Material | Alloy Steel |
| Strength Grade | 12.9 |
| Head Style | Hex Socket Cap |
| Drive Type | Internal Hex |
| Thread Standard | Metric Coarse |
| Surface Finish | Black Oxide |
| Compliance Standard | DIN 912 / ISO 4762 |
| Hardness | 39-44 HRC |
| Available Sizes | M2, M3, M4, M5, M6, M8, M10, M12, M16, M20, M24, M30 |
| Package Type | Bulk Plastic Box |
Anonymous
Apr 15, 2026
Rating: 5/5
Professional Quality
These are genuine 12.9 grade bolts. I tested the hardness and it meets the specifications for heavy machinery.
Anonymous
Apr 03, 2026
Rating: 5/5
Fast Delivery
Needed them urgently for a project deadline. Shipping was faster than expected and packaging was secure.
Anonymous
Mar 19, 2026
Rating: 5/5
Strong and Reliable
Used these for an engine mount repair. The strength grade is exactly as advertised and they held up under high torque.
Anonymous
Mar 02, 2026
Rating: 5/5
Good Bulk Deal
Bought a large assortment for my workshop. Great value for money compared to local hardware stores.
Anonymous
Feb 21, 2026
Rating: 5/5
Great Precision
Threads are clean and precise. Fit perfectly into my CNC machine components without any cross-threading issues.
Q: What size Allen key is needed for the M6 bolts?
A: For M6 hex socket cap screws, a 5mm Allen key is typically required.
Q: Are these screws made of stainless steel?
A: No, these are made of high-strength alloy steel with a black oxide finish for corrosion resistance.
Q: Can I return unused boxes if I ordered too many?
A: Yes, unused items in original packaging can be returned within 30 days of delivery.
Q: Is there a torque specification provided?
A: General torque guidelines for Grade 12.9 are available in the product description tab.
Q: Do you sell matching nuts for the M10 size?
A: Yes, we carry compatible Grade 12.9 nuts. Please check our store catalog under nuts and washers.
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