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The Range£10.21Visit shop Unifix Grade 12.9 Socket Head Cap Screws Din 912 Bright Zinc Plated - M5 X 30 (Box Of 200) - Grey
Visit shopThe Range£15.26Visit shop Unifix Grade 12.9 Socket Head Cap Screws M8 X 50 - Box Of 100 - Grey
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The Unifix Grade 12.9 Socket Head Cap Screws are precision-engineered fasteners designed for professionals and hobbyists tackling high-strength engineering or construction projects. These screws offer exceptional tensile strength and reliable performance under load, though they require a hex key for installation and are best suited for structural applications rather than decorative use.
| Colour | Silver |
|---|---|
| Model Part Number | 1355396 |
| Brand | Unifix |
Grade 12.9 is a high-tensile steel rating, indicating that the screw has a minimum tensile strength of 1200 MPa and a yield strength of 1080 MPa.
Yes, the bright zinc plating provides corrosion resistance suitable for many outdoor applications, though they are not as resistant as stainless steel for coastal or highly corrosive environments.
You will need a standard Allen key or hex key that matches the socket size of the specific screw diameter.
The screws are typically sold as individual fasteners or in specific packs; ensure you source compatible nuts with a matching thread grade.
Generally, yes, provided the threads and the socket head are not damaged or deformed during removal.
Ensure the hex key is fully inserted into the socket and is of the correct imperial or metric size. Do not use worn-out tools.
Back the screw out slightly, clean the threads with a wire brush, and re-apply a small amount of machine oil or anti-seize compound.
To install, select the correctly sized hex key for the socket head diameter. Always ensure the threaded hole is properly tapped to the matching thread pitch before inserting the screw to prevent cross-threading. While the bright zinc plating offers decent protection against oxidation, consider using a thread-locking compound if installing in areas prone to constant mechanical vibration. For cleaning, avoid using harsh acidic or abrasive chemicals that could compromise the zinc coating; a simple wipe with a clean, dry cloth is sufficient for maintenance.
