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The Range£8.28Visit shop Unifix Grade 10.9 Socket Csk Head Screws M6 X 12 - Box Of 200 - Grey
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The Unifix Grade 10.9 Socket Csk Head Screws are designed for professionals and DIY enthusiasts who require superior tensile strength and a flush finish in heavy-duty structural or mechanical assemblies. Featuring a durable Grade 10.9 steel construction and a bright zinc-plated finish, these screws offer excellent load-bearing capacity and resistance to corrosion. While they are highly effective for secure fastening, users should ensure they have the correct size hex key to avoid stripping the internal socket during high-torque installations.
| Colour | Grey |
|---|---|
| Model Part Number | 1262977 |
| Brand | Unifix |
Grade 10.9 indicates the mechanical properties of the steel, specifically that it has a high tensile strength of 1000 MPa and a yield strength of 900 MPa.
The zinc plating provides corrosion resistance suitable for indoor or sheltered outdoor use, but they are not recommended for direct exposure to harsh marine environments.
Yes, provided the thread remains undamaged and the internal hex socket has not been stripped during removal.
You need a standard metric hex key (Allen key) that matches the size of the internal socket.
Yes, pre-drilling and countersinking are required to ensure the screw sits flush and to prevent the material from splitting.
Verify you are using the correct metric hex key size and ensure it is fully inserted into the socket.
The hole has likely not been countersunk deeply enough; remove the screw and widen the countersink angle.
While zinc-plated, exposure to moisture can still cause surface spotting; clean with a light lubricant and ensure the area is kept dry.
To install these screws, first drill and countersink your pilot hole to the appropriate depth to allow the screw head to rest flush with the surface. Use a high-quality hex key that fits snugly into the internal socket to prevent slipping during the tightening process. While the zinc-plated finish provides good corrosion resistance, it is recommended to keep these screws in a dry, low-humidity storage area before use. Avoid overtightening with power tools to preserve the integrity of the socket head, and periodically inspect joints in high-vibration equipment to ensure fasteners remain seated.
