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The Range£6.81Visit shop Unifix Grade 10.9 Socket Csk Head Screws M3 X 8 - Q107991000300008000 - Box Of 500 - Grey
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The Unifix Grade 10.9 Socket Button Head Screws are designed for professionals and hobbyists who require high-strength fastening solutions in industrial or mechanical assemblies. These screws offer excellent tensile strength and a low-profile head for a clean aesthetic finish, though they require specific hex key tools for proper installation compared to traditional Phillips or slotted fasteners.
| Colour | Black |
|---|---|
| Model Part Number | 5014196333991 |
| Brand | Unifix |
Grade 10.9 indicates the strength of the steel; it means the screw has a minimum tensile strength of 1000 MPa and a yield strength of 900 MPa.
While the black finish offers some protection, they are not specifically treated for harsh outdoor weather. For exterior use, regular maintenance or a protective coating is recommended.
You need a standard hexagonal (Allen) key or a corresponding hex bit for a power drill/driver.
Yes, because they are manufactured from high-strength carbon steel, they will be magnetic.
If the threads and the socket drive are not deformed, they can generally be reused, though critical load-bearing applications should always use fresh fasteners.
Ensure the hex key is the correct size and fully inserted. If the screw persists in slipping, the drive may be damaged, and the screw should be replaced.
Check the thread pitch and diameter match. If it is a new installation, ensure the tapped hole is clean and not obstructed by paint or debris.
To ensure a secure fit, use a high-quality hex key that matches the socket size precisely. Avoid using worn-out tools, as they can round off the internal socket drive. When installing, tighten until snug; if the assembly is subject to extreme vibration, consider using a thread-locking compound. Store these screws in a dry environment to prevent oxidation, as the black finish provides only minimal protection against humidity. Always check that your tapped holes are clean and free of debris before threading.
