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The Range£12.32Visit shop Unifix Grade 12.9 Socket Head Cap Screws Din 912 Plain - M6 X 40 (Box Of 200) - Grey
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The Unifix Grade 12.9 Socket Head Cap Screws are engineered for professionals and hobbyists who require exceptional tensile strength and reliability in heavy-duty machinery or structural assemblies. Adhering to the DIN 912 standard, these M10 x 55 screws provide a secure fit using standard hex key tools; however, users should note that the high-carbon alloy steel requires proper lubrication and moisture control to prevent surface corrosion in outdoor or high-humidity environments.
| Colour | Black |
|---|---|
| Model Part Number | 5014196341675 |
| Brand | Unifix |
It refers to the mechanical properties of the steel, indicating a high tensile strength of approximately 1200 MPa, making it suitable for high-stress industrial use.
While they are very strong, they are made of alloy steel and may rust in damp conditions unless treated with a protective oil or coating.
They comply with the DIN 912 standard, which specifies the dimensions and tolerances for internal hex socket head cap screws.
You will need a standard metric hex key (Allen wrench) that matches the socket size for an M10 screw.
The M10 x 55 designation follows DIN 912 standards which typically feature a partial thread design, providing a smooth shank for better shear resistance in structural joints.
Ensure you are using the correct metric hex key size and check that the key head is not rounded from wear.
Check the threaded hole for debris, burrs, or mismatched thread pitch; do not force the screw if resistance is encountered.
Clean the affected area with a wire brush and apply a thin layer of machine oil or protective lubricant to seal the steel surface.
Installation requires a high-quality metric hex key. Before inserting, ensure that the threaded hole is clear of debris to prevent cross-threading. For critical machinery, apply a light coat of machine oil or anti-seize compound to the threads to maintain clamping force and prevent galvanic seizing. To prevent surface rust, keep the screws in their original packaging until use and store them in a dry, climate-controlled environment. If used in an environment exposed to moisture, consider a protective coating or light oil film maintenance.
