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The Unifix A2-70 Socket Button Head Screws are essential for DIY enthusiasts and professionals seeking high-quality, corrosion-resistant fastening solutions for both indoor and outdoor projects. These stainless steel screws provide excellent durability and a sleek, low-profile finish, though users should ensure their tools are compatible with the specific M4 socket drive to avoid stripping the heads.
| Colour | Grey |
|---|---|
| Model Part Number | A2-70 |
| Brand | Unifix |
A2 refers to the grade of stainless steel (304), and 70 denotes the tensile strength of the material.
Yes, A2-70 stainless steel has good corrosion resistance, though for direct salt-spray environments, 316-grade steel is generally preferred.
These require an Allen key or hex bit set that corresponds to the socket size of an M4 screw.
A2-70 stainless steel is typically non-magnetic or only very slightly magnetic due to the cold-working process.
These are machine screws and are intended for pre-threaded holes or nuts, not for direct tapping into wood.
This specific variant comes in a box of 500 units.
Ensure you are using the exact size hex key and that the key is not worn. Avoid using worn-out drill bits.
Apply a small amount of lubricant or anti-seize paste to the threads if you encounter resistance during installation.
For optimal installation, always use a high-quality hex key or driver bit that perfectly matches the socket size to prevent damaging the fastener. While the A2-70 grade is highly resistant to weather, it is recommended to keep them in a dry, ventilated area to preserve their appearance. These screws are designed for standard M4-threaded holes; if using them in timber or softer materials, ensure you have used the appropriate pilot hole to prevent splitting. Avoid using power drivers at high speeds, as the stainless steel threads can seize under high friction heat.
