A
Anonymous
Apr 14, 2026
Rating: 5/5
True Grade 12.9
Tested the hardness and it meets specifications. Reliable supplier.
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 |
| Head Style | Flat Head Countersunk |
| Drive Type | Hex Socket |
| Available Sizes | M3, M4, M5, M6, M8, M10 |
| Thread Type | Metric Coarse |
| Finish | Black Oxide |
| Standard | DIN 7991 |
| Package Count | 100 Pieces |
| Weight | Varies by Size |
5 reviews
A
Anonymous
Mar 24, 2026
Rating: 5/5
Fast Shipping
Needed these urgently for a project. Arrived on time and worked great.
A
Anonymous
Mar 13, 2026
Rating: 5/5
Perfect for Machinery
Used these for equipment repair. The countersunk head sits perfectly flush.
A
Anonymous
Mar 07, 2026
Rating: 5/5
High Quality Fasteners
These screws hold up well under high torque. No stripping on the hex socket.
A
Anonymous
Feb 19, 2026
Rating: 4/5
Good Value Bulk Pack
Quality is solid. Packaging was a bit damaged but screws were fine.
5 FAQ
Q: Is the thread full length?
A: These are fully threaded flat head socket screws according to DIN 7991 standards.
Q: What size Allen key do I need for M6?
A: You will typically need a 5mm hex key for M6 socket screws.
Q: Can I get a tax invoice for bulk orders?
A: Yes, invoices are generated automatically at checkout for all business orders.
Q: Do you sell matching nuts?
A: Yes, please check our store for Grade 12.9 hex nuts compatible with these bolts.
Q: Are these suitable for outdoor use?
A: Black oxide offers mild corrosion resistance. For harsh outdoor environments, we recommend stainless steel.
![[M2-M20] Stainless Steel Spring Washer](https://www.gosteppe.com/cache/medium/product/16306/legacy-main-ef3d2dba3bde669d48e6cca2.webp)
