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The Range£7.20Visit shop Unifix Grade 12.9 Socket Head Cap Screws M5 X 10 - Box Of 200 - Grey
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Unifix Grade 12.9 Socket Head Cap Screws are engineered for industrial professionals and serious DIY enthusiasts who require high structural integrity and exceptional tensile strength in their fasteners. These screws offer superior durability for heavy-duty assembly and machinery applications, though they are specifically intended for high-stress environments and may be overkill for lightweight or hobbyist craft projects.
| Colour | Silver |
|---|---|
| Model Part Number | 1355420 |
| Brand | Unifix |
The 12.9 grade indicates a high-tensile steel fastener with a minimum tensile strength of 1200 MPa and a minimum yield strength of 1080 MPa.
While they have a corrosion-resistant finish, they are primarily designed for indoor industrial applications. For constant exposure to rain or salt air, stainless steel fasteners are recommended.
DIN 912 is a German engineering standard that specifies the dimensions, thread pitch, and material quality for socket head cap screws.
If they have been torqued significantly or show signs of deformation or thread wear, they should be replaced to maintain structural safety.
You will need a metric hex key (Allen wrench) or a hex socket bit that matches the internal diameter of the screw's head.
Verify that the hole is properly tapped to the correct size and that no debris is obstructing the thread path.
Ensure the hex key is the exact metric size required for the screw and is fully seated into the socket base.
Verify that the assembly design includes a counterbore deep enough to allow the cap head to sit flush with the surface.
To ensure optimal performance, always use an appropriately sized hex driver or Allen key to prevent stripping the socket head. Before installation, ensure that the mating hole is clean and free of debris. While these screws feature a corrosion-resistant finish, they are not stainless steel; for long-term outdoor use, consider applying an anti-seize lubricant or using an additional protective sealant. Store the fasteners in a dry, low-humidity environment to maintain the integrity of the protective coating.
