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The Unifix A2-70 Socket Button Head Screws are an essential fastener solution designed for professional contractors and DIY enthusiasts who require high-strength, corrosion-resistant hardware for various assembly tasks. Featuring a robust M5 x 16 configuration and complying with ISO 7380-1 standards, these screws offer reliable performance and a clean, low-profile finish. While these screws provide exceptional durability in most environments, users should note that they are specifically optimized for hex-key installation rather than traditional screwdriver heads, necessitating the use of the appropriate Allen wrench for proper torque application.
| Colour | Grey |
|---|---|
| Model Part Number | 5014196334516 |
| Brand | Unifix |
A2 refers to the grade of stainless steel (similar to 304 grade), and 70 refers to the tensile strength class, indicating it is cold-worked for extra durability.
Yes, they are highly corrosion-resistant and suitable for most outdoor applications, though they are not recommended for direct contact with marine or saltwater environments.
Standard M5 socket button head screws typically require a 3mm hex key.
They may show slight magnetic properties due to the cold-working process used to harden the stainless steel, which is normal for this material grade.
Each box contains 500 individual M5 x 16 screws.
Check that the hole is properly threaded and clear of paint or debris; if resistance persists, ensure you are using the correct thread pitch.
Verify that the hex key is not worn and is fully seated within the socket; if the socket is already damaged, replace the screw to prevent further stripping.
While A2-70 is corrosion-resistant, it can rust if exposed to harsh chemicals or chlorine; clean the area and ensure the environment is suitable for stainless steel.
For proper installation, use a high-quality hex key that fits the socket size precisely to avoid stripping the interior. When installing into metal, it is recommended to use a small amount of anti-seize lubricant on the threads if you anticipate needing to remove the screws frequently in the future. These screws are compatible with standard M5 threaded inserts or pre-tapped holes. To maintain the appearance, wipe them down with a clean, dry cloth after installation to remove any oils from handling. Avoid using harsh chemical cleaners, as these can dull the stainless steel finish over time.
