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Rackhams£4.98Visit shop Fixaball Black M6 Socket Cap Allen Screw Bolt 12.9 Self Colour - 8 - 12Mm
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The Range£7.68Visit shop Unifix Grade 12.9 Socket Head Cap Screws Din 912 Plain - M5 X 10 (Box Of 200) - Grey
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Unifix Grade 12.9 Socket Head Cap Screws are high-strength fasteners designed for demanding industrial, automotive, and construction applications where structural integrity is paramount. These fasteners provide exceptional load-bearing capabilities and consistent quality under stress, making them ideal for professional mechanical assemblies. One caveat to keep in mind is that their high-tensile nature requires precise torque application during installation to avoid over-tightening.
| Colour | Grey |
|---|---|
| Model Part Number | 1260869 |
| Brand | Unifix |
The 12.9 grade refers to the mechanical properties of the steel, indicating a high tensile strength of 1200 MPa and a yield strength of 1080 MPa.
While durable, they are not stainless steel. Use them outdoors only if they are protected from direct moisture or coated with a rust-preventative.
It is generally recommended to use new fasteners for critical structural applications to ensure the integrity of the bolt remains uncompromised.
DIN 912 is the German industrial standard for socket head cap screws, specifying dimensions, thread types, and material requirements.
Depending on the material of the surface you are fastening, using a hardened steel washer can help distribute the clamping load more effectively.
Verify that you are using a high-quality hex key that matches the metric size of the screw exactly. Ensure the head is free of debris.
Do not force the screw. Check the thread pitch and diameter to ensure it is the correct match for the tapped hole. Use a thread chaser on the hole if necessary.
Though durable, if exposed to harsh elements, clean the surface with a wire brush and apply a protective rust-inhibiting coating.
For optimal performance, ensure you are using the correct size hex key to avoid rounding the internal socket. Always clean the threads of both the screw and the receiving hole to remove debris or excess grease before installation. It is recommended to use a calibrated torque wrench to achieve the specific tension required for your application. If working in environments prone to moisture, consider applying a thin layer of anti-seize or light lubricant to the threads to prevent future seizing while maintaining the integrity of the finish.
