A
Anonymous
Apr 19, 2026
Rating: 5/5
Strong and Durable
Grade 12.9 is no joke. Very high tensile strength. Will buy again.
Description
Fast Shipping from Shenzhen, Jiangsu, and Tianjin Warehouses; Corporate Purchases Welcome
Reviews
Attributes
| Brand | - |
| Category | Industrial Small Parts / Connectors and Fasteners |
| Origin | - |
| Material | Alloy Steel |
| Strength Grade | 12.9 |
| Finish | Black Nickel Plated |
| Head Style | Cylindrical Cap |
| Drive Type | Hex Socket |
| Thread Standard | ISO Metric |
| Available Sizes | M2.5 to M8 |
| Tensile Strength | 1220 MPa |
| Package Quantity | 100 Pieces |
| Standard Compliance | ISO 4762 |
5 reviews
A
Anonymous
Mar 03, 2026
Rating: 4/5
Good but strict torque
Great bolts but make sure you use a torque wrench. Very hard steel.
A
Anonymous
Feb 23, 2026
Rating: 5/5
Fast Delivery
Arrived earlier than expected. Packaging was secure.
A
Anonymous
Feb 08, 2026
Rating: 5/5
Perfect Fit
Threads are clean and precise. No cross-threading issues.
A
Anonymous
Jan 30, 2026
Rating: 5/5
Excellent Quality
These bolts are exactly what I needed for my CNC project. The black nickel finish looks professional.
5 FAQ
Q: What Allen key size for M5?
A: A 4mm hex key is required for M5 size.
Q: Do you sell matching nuts?
A: Yes, search for Grade 12.9 nuts in our store.
Q: Can I mix sizes in one pack?
A: No, packs are single size. Select size from dropdown.
Q: Is this suitable for outdoor use?
A: Black nickel offers some protection, but stainless is better for harsh environments.
Q: What is the hardness rating?
A: Typically 39-44 HRC.
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