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B&Q£12.51Visit shop B&Q - Grade 10.9 Socket Csk Head Screws Din 7991 BzpM6 X 40Box Of 200
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The Range£13.71Visit shop Unifix Grade 10.9 Socket Csk Head Screws M4 X 10 - Box Of 500 - Grey
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The Unifix Grade 10.9 Socket Csk Head Screws are engineered for professionals and DIY enthusiasts who require high-tensile fasteners for demanding construction and engineering projects. These screws feature a robust Grade 10.9 steel construction that ensures superior strength and durability, while their countersunk head design allows for a flush, professional finish. While they offer excellent performance in heavy-duty applications, users should ensure they are using the correct hex key size to avoid stripping the socket head during installation.
| Colour | Silver |
|---|---|
| Model Part Number | 1262026 |
| Brand | Unifix |
Grade 10.9 refers to the strength classification of the steel, indicating a high-tensile strength suitable for heavy-duty engineering applications.
These screws are manufactured according to the DIN 7991 standard, which defines the specifications for countersunk socket head screws.
They feature good corrosion resistance, but if used in highly corrosive or maritime environments, additional protective coatings or stainless steel alternatives may be required.
Yes, you will need a standard metric hex key (Allen key) that fits the internal socket of the screw head.
While they are robust, frequent removal and re-installation can potentially wear the socket head. Inspect for signs of deformation before reusing.
Verify that you are using the correct size metric hex key and apply steady, downward pressure while turning.
Ensure the countersink hole is drilled to the correct depth and angle matching the screw head taper.
Check that the pilot hole is correctly sized for the diameter of the screw; if installing into metal, use a thread tap if necessary.
To ensure optimal performance, verify that the pilot hole diameter is appropriate for the screw gauge to prevent splitting or unnecessary torque during installation. Always use an appropriately sized metric hex key (Allen key) that fits snugly into the socket to ensure even distribution of torque. These screws are designed for metal-to-metal or wood-to-metal applications. When installing into metal, ensure the receiving thread is clean and free of debris. To maintain the integrity of the finish, avoid using high-impact power drivers if possible, as they can cause the socket to deform. Keep the screws stored in a dry environment to ensure their long-term corrosion resistance remains intact.
