Description
Reviews
| Brand | - |
| Category | Industrial Small Parts / Connectors and Fasteners |
| Origin | - |
| Material | Alloy Steel |
| Strength Grade | 12.9 |
| Surface Finish | Black Oxide |
| Head Style | Socket Cap |
| Drive Type | Hex Internal |
| Thread Type | Metric Coarse |
| Industry Standard | DIN 912 / ISO 4762 |
| Hardness | 39-44 HRC |
| Package Type | Assorted Storage Box |
| Country of Origin | China |
Anonymous
Apr 16, 2026
Rating: 5/5
Excellent Strength
Used these for a custom jig build in the shop. The heads held up well under high torque without stripping.
Anonymous
Apr 06, 2026
Rating: 5/5
Fast Delivery
Box arrived well organized and separated by size. Saved me a lot of time sorting.
Anonymous
Mar 30, 2026
Rating: 4/5
Solid Fasteners
Black finish looks nice and provides some rust protection. Would buy again for general use.
Anonymous
Mar 16, 2026
Rating: 4/5
Good Value
Most sizes fit perfectly. One or two threads seemed slightly tight but nothing a tap couldn't fix.
Anonymous
Jan 29, 2026
Rating: 5/5
Professional Grade
Hardness is consistent across the box. Great for machinery assembly where standard screws fail.
Q: Are these suitable for outdoor applications?
A: Black oxide offers mild corrosion resistance. For harsh outdoor environments, we recommend stainless steel.
Q: What is the minimum tensile strength?
A: Grade 12.9 indicates a minimum tensile strength of 1220 MPa.
Q: Can I purchase just the M8 size?
A: This listing is for the full assorted box only. Single sizes are not available separately.
Q: Do you provide material certificates?
A: Mill certificates are available upon request for bulk orders. Please contact us directly.
Q: Are these screws magnetic?
A: Yes, since they are made of alloy steel, they are magnetic.
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