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B&Q£9.47Visit shop B&Q - A2-70 St/st Socket Button Head Screws M6 X 16Q207380000600016000Box Of 200
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The Unifix A2-70 Socket Button Head Screws are high-quality fasteners ideal for professional contractors and DIY enthusiasts who require reliable, corrosion-resistant hardware for industrial or home projects. These screws feature a durable A2-70 stainless steel construction and an ISO 7380-1 compliant design, ensuring consistent performance for secure, low-profile assembly. While they offer exceptional strength and a sleek grey finish, they require specific hex-key tools for installation, which may not be as intuitive for users accustomed to standard Phillips or slotted drives.
| Colour | Grey |
|---|---|
| Model Part Number | 1262051 |
| Brand | Unifix |
A2 refers to the grade of stainless steel (typically 304), and 70 indicates the tensile strength class (minimum 700 MPa).
Yes, their A2-70 stainless steel construction offers excellent resistance to rust and corrosion, making them suitable for most outdoor applications.
You need a standard hex key (Allen wrench) that matches the socket size of the M4 head.
A2 stainless steel is generally considered non-magnetic, though minimal magnetic properties can sometimes occur due to the cold-working process during manufacturing.
This specific variant features a thread diameter of M4 and a length of 16mm.
While durable, you should consult an engineer for load-bearing specifications to ensure the M4 size meets the requirements of your specific project.
Verify that the thread pitch matches the tapped hole and ensure the hole is free of debris.
Ensure the hex key is the correct size and is inserted fully into the socket before applying torque.
Clean the screw with a non-abrasive stainless steel cleaner to remove surface contaminants or dust.
Installation requires a compatible hex key (Allen wrench) sized appropriately for the socket drive. Before installation, confirm the depth of the pilot hole or the threading of the receiving component to ensure the screw length (16mm) is appropriate for the material thickness. Because these are stainless steel, avoid using carbon steel tools to drive them, as this can transfer particles and potentially lead to surface rust (cross-contamination). Keep the screws stored in a dry location to maintain the finish. If used in extreme marine or coastal environments, occasional cleaning and checking for galvanic corrosion is recommended, though the A2-70 steel provides significant innate protection.
