A
Anonymous
Apr 12, 2026
Rating: 5/5
Fast Delivery
Needed M14 urgently. Arrived in two days and worked great.
Description
Grade 12.9 Blackened DIN931 Partial Thread Hex Head Bolts, Extended Length Bolts M6 M8 M10 M12 M14 M24
Reviews
Attributes
| Brand | - |
| Category | Industrial Small Parts / Connectors and Fasteners |
| Origin | - |
| Material | Alloy Steel |
| Strength Grade | 12.9 |
| Surface Finish | Black Oxide |
| Standard | DIN 931 |
| Thread Type | Metric Coarse |
| Head Style | Hexagon |
| Shank Type | Half-Threaded |
| Size Range | M6 to M24 |
| Tensile Strength | 1220 MPa |
| Packaging | Bulk Box |
5 reviews
A
Anonymous
Apr 05, 2026
Rating: 5/5
Industrial Quality
Using in production line assembly. No issues so far with load bearing.
A
Anonymous
Mar 21, 2026
Rating: 5/5
True to Spec
Measured threads with calipers. Perfect DIN fit for my machinery.
A
Anonymous
Feb 20, 2026
Rating: 4/5
Good but brittle
Very hard steel, be careful not to overtighten or they may snap.
A
Anonymous
Feb 01, 2026
Rating: 5/5
Excellent Strength
Used for turbo manifold. Held torque perfectly without stretching.
5 FAQ
Q: Are washers included with the bolts?
A: No, these are sold as bolts only. Washers are available separately.
Q: Can I use these on aluminum components?
A: Yes, but we recommend using anti-seize compound to prevent galling.
Q: Do you offer volume discounts?
A: Yes, please contact our sales team for orders over 500 units.
Q: Is the black coating thick?
A: No, it is a thin oxide layer primarily for appearance and mild protection.
Q: What wrench size is needed for M12?
A: Typically 18mm for DIN 931 M12 hex heads.
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