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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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The Unifix Grade 12.9 Socket Head Cap Screws are high-strength fasteners designed for demanding mechanical and structural engineering applications where reliability is paramount. These precision-engineered screws are ideal for professional contractors and engineers who require consistent torque and secure clamping, though users should note that their high-carbon steel composition makes them susceptible to rust if not used in appropriate environments.
| Colour | Grey |
|---|---|
| Model Part Number | DIN 912 |
| 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.
These screws are generally intended for indoor or protected mechanical applications. They are not stainless steel and may rust if exposed to moisture.
You will need a high-quality Allen key (hex key) that matches the specific socket size of the bolt.
While they are robust, it is generally recommended to replace high-tensile screws if they have been subjected to extreme fatigue or over-torqueing.
Yes, as DIN 912 products, these adhere to standard metric dimensions.
Verify the Allen key size is correct. If the socket is rounded, the screw must be extracted using a screw extractor set.
Ensure the threads in the hole are clean and free of paint or metal burrs; apply a small amount of anti-seize compound.
Clean the surface with a wire brush and apply a light machine oil or protective sealant to prevent further oxidation.
When installing Unifix DIN 912 screws, always ensure the mating surface is flat and the tapped hole is clean of debris. Use a high-quality Allen key that matches the socket size precisely to avoid stripping the interior. Because these screws are made of hardened steel, they can be prone to surface oxidation. To ensure longevity, keep the screws in a dry, low-humidity storage environment. If used in an environment with humidity, consider applying a thin layer of protective oil or anti-seize lubricant, which also helps prevent the screw from seizing in the tapped hole over time.
