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The Range£11.26Visit shop Unifix Grade 10.9 Ht Hexagon Setscrews Din 933 S/Col - M6 X 12 - Grey
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The Unifix Grade 10.9 High Tensile Hexagon Setscrews are professional-grade fasteners designed for demanding construction, automotive, and engineering applications that require superior load-bearing strength. These screws provide exceptional durability and secure clamping force thanks to their hardened alloy steel construction, making them ideal for heavy-duty structural assembly. A key caveat to note is that these fasteners are primarily intended for high-stress environments and may require specific torque settings to prevent material fatigue in softer base metals.
| Colour | Black |
|---|---|
| Model Part Number | DIN 933 |
| Brand | Unifix |
The 10.9 rating indicates a specific level of tensile strength, where the '10' represents a nominal tensile strength of 1000 MPa and the '.9' indicates the yield point is 90% of the tensile strength.
While these bolts feature a standard industrial finish, they are not stainless steel. They are best used in sheltered environments or should be coated with an appropriate anti-corrosion agent if exposed to the elements.
While a drill driver can be used for initial thread engagement, a manual torque wrench is highly recommended for the final tightening stage to ensure precise torque application.
Using a washer is recommended to distribute the clamping force evenly across the surface of the material and to prevent damage to the substrate during tightening.
The length of a setscrew is typically measured from under the head to the tip of the threads. Ensure the length allows for sufficient thread engagement in the receiving component.
Ensure the socket or wrench is the correct size and fully seated on the hexagonal head to prevent slipping.
Check that the threads are clean and free of debris, and ensure the bolt is perfectly perpendicular to the mating surface to prevent cross-threading.
To ensure proper performance, always clean the threads before installation to remove any grit or metal shavings. Use a calibrated torque wrench to achieve the manufacturer's recommended clamping force. When selecting a bolt, verify that the thread pitch and diameter match your tapped hole or nut exactly. For maintenance, regularly inspect the bolt head for signs of deformation and ensure that no rusting has compromised the integrity of the fastener. If replacing bolts in a safety-critical application, it is best practice to replace the nuts and washers simultaneously.
