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B&Q£10.98Visit shop B&Q - A2-70 St/st Socket Button Head Screws M4 X 8Q207380000400008000Box Of 1000
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The Unifix A2-70 Socket Button Head Screws (M6 x 30) are an essential choice for mechanical assembly and construction projects requiring a secure, low-profile finish. These high-grade stainless steel fasteners are designed for professionals and DIY enthusiasts who need reliable corrosion resistance and structural integrity. While they offer excellent durability, it is important to note that the A2-70 grade is intended for general outdoor or indoor use and may not be suitable for extreme chemical or marine-heavy environments.
| Colour | Silver |
|---|---|
| Model Part Number | Q207380000600030000 |
| Brand | Unifix |
While A2-70 stainless steel offers good corrosion resistance, it is not marine-grade (A4). It is best suited for general indoor or mild outdoor use.
You will need a standard metric hex key (Allen wrench) that fits the M6 socket head specification.
Yes, they can be used in wood, provided you use an appropriate insert or ensure the pilot hole is correctly sized for an M6 machine thread.
This box contains 200 units, making it ideal for larger projects.
Yes, these screws are manufactured to comply with the ISO 7380-1 standard.
Check that the hole is not obstructed by debris and ensure the thread pitch is aligned properly before applying heavy force.
Verify that you are using the correct size metric hex key and ensure it is fully seated in the socket before turning.
Stainless steel can gall; apply a small amount of anti-seize lubricant or wax to the threads if you encounter resistance during assembly.
For optimal installation, use a standard metric hex key corresponding to the internal socket drive size. Ensure the mating surface is clean to prevent cross-threading. When installing into softer metals or wood, pre-drilling the hole to the appropriate diameter is recommended to maintain alignment. While these screws are corrosion-resistant, they should be cleaned periodically in highly polluted or salty environments to prevent surface oxidation. Always ensure the length of 30mm is appropriate for the thickness of the parts being joined to ensure full thread engagement without protruding past the target surface.
