A
Anonymous
Apr 16, 2026
Rating: 5/5
Perfect Fit
M6 size fit perfectly into my assembly. No issues with threading or alignment.
Description
Grade 12.9 High-Strength Socket Head Cap Screws M3 M4 M5 M6 M8 M20
Reviews
Attributes
| Brand | - |
| Category | Industrial Small Parts / Connectors and Fasteners |
| Origin | - |
| Material Composition | Alloy Steel 42CrMo |
| Strength Class | Grade 12.9 |
| Head Type | Cylindrical Hex Socket |
| Thread Standard | ISO Metric Coarse |
| Surface Treatment | Black Oxide Coating |
| Drive Type | Internal Hexagon |
| Hardness Rating | 39-44 HRC |
| Tensile Strength | 1220 MPa Min |
| Package Quantity | 100 Pieces per Box |
| Country of Origin | Manufactured in Asia |
5 reviews
A
Anonymous
Apr 15, 2026
Rating: 5/5
Professional Grade
We use these in our workshop regularly. Consistent quality across all sizes ordered.
A
Anonymous
Apr 06, 2026
Rating: 5/5
Strong and Reliable
Perfect for high tension applications. Very satisfied with the strength and finish.
A
Anonymous
Mar 25, 2026
Rating: 5/5
Excellent Quality
Used these for a CNC project. Threads are precise and heads didn't strip under high torque.
A
Anonymous
Mar 20, 2026
Rating: 4/5
Good Value
Great bolts, though shipping took a bit longer than expected. Product itself is solid.
5 FAQ
Q: Is M20 size currently in stock?
A: Yes, all listed sizes including M20 are currently available for immediate dispatch.
Q: What torque should I apply for M8 bolts?
A: Please refer to standard torque charts for Grade 12.9 M-series bolts based on your lubrication conditions.
Q: Are Allen keys included in the box?
A: No, fasteners are sold separately from tools. Please purchase drive keys separately.
Q: Do you provide material certificates?
A: Certificates of conformity are available for bulk orders upon request before shipment.
Q: Are these corrosion resistant?
A: They have black oxide coating for mild protection but are not stainless steel. Use oil for outdoor settings.
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