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The Range£10.43Visit shop Unifix Grade 10.9 Ht Hexagon Setscrews Din 933 S/Col - M8 X 25 - Grey
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The Unifix Grade 10.9 High Tensile Hexagon Setscrews are essential components for engineers and construction professionals who require high-strength fastening solutions for structural integrity. These setscrews provide superior load-bearing performance compared to standard hardware, though they are specifically intended for demanding environments and may be overkill for light-duty residential projects.
| Colour | Grey |
|---|---|
| Model Part Number | DIN 933 |
| Brand | Unifix |
Grade 10.9 refers to the mechanical property of the steel, indicating a nominal tensile strength of 1000 MPa and a yield strength of 900 MPa.
While technically possible, it is recommended to pair high-tensile bolts with nuts of a corresponding strength grade to maintain structural uniformity.
Yes, DIN 933 indicates a full-thread design, meaning the threads extend from the underside of the head to the tip.
They are designed for high strength, not specific corrosion resistance. If used in exposed conditions, they should be treated or protected.
If the bolt has not been subjected to significant plastic deformation (stretching), it may be reused; however, discard any bolts showing signs of wear or damage.
Check for debris in the threads or potential cross-threading; if resistance persists, ensure the bolt diameter and pitch match the internal threads.
Ensure the socket or wrench size exactly matches the hexagon head and that the tool is fully seated before applying torque.
For optimal results, ensure the tapped hole or mating nut is also rated for high-tensile applications. When tightening, use a calibrated torque wrench to reach the manufacturer’s specified tension, as over-tightening can compromise the steel's structural integrity. Store these screws in a dry, climate-controlled environment to prevent surface oxidation. If the screws are used in an outdoor environment, consider applying a suitable anti-corrosion spray or grease to preserve the finish and prevent seizing.
