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The Range£20.20Visit shop Unifix Grade 12.9 Ht Hexagon Setscrews M10 X 40 - Box Of 100 - Grey
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The Unifix Grade 12.9 High Tensile Hexagon Setscrews are engineered for construction and engineering professionals who require superior fastening strength and reliability. These fasteners provide exceptional durability for demanding high-stress applications; however, users should be aware that the high-tensile nature of the material makes them more susceptible to corrosion than stainless steel alternatives if left in exposed environments.
| Colour | Grey |
|---|---|
| Model Part Number | DIN 933 |
| Brand | Unifix |
The 12.9 grade indicates the mechanical properties of the steel, specifically that it has a minimum tensile strength of 1200 MPa and a yield strength of 1080 MPa.
Yes, as per the DIN 933 standard, these are hexagon setscrews which are threaded along the entire length of the shaft.
While they provide excellent strength, they are not naturally corrosion-resistant. They should be coated, painted, or kept in an environment shielded from moisture.
No, they are designed for use with standard hexagon-drive hand tools, sockets, or pneumatic impact wrenches.
In this context, a setscrew (per DIN 933) is fully threaded up to the head, whereas a bolt (DIN 931) often has a non-threaded shank section.
Verify the thread pitch matches your component exactly. Clear any debris or paint from the internal threads using a tap.
Ensure you are using the correct size wrench/socket. Switch to a high-quality six-point socket to maximize contact area.
Clean the surface with a wire brush and apply a rust-preventative oil or cold galvanizing spray to protect the exposed metal.
These screws are designed for use with pre-tapped holes or compatible nuts. Ensure the thread pitch matches your receiving component perfectly to prevent cross-threading, which can weaken the connection. Given the high-tensile material, avoid using these in outdoor or high-moisture settings unless a rust-preventative coating or grease is applied during installation. To maintain the integrity of the fastener, store in a dry environment to prevent premature surface corrosion. If you are reusing these screws after removal, inspect the threads for signs of deformation or stripping before reinstalling.
