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The Unifix Grade 10.9 High Tensile Hexagon Setscrews are essential components for professionals and DIY enthusiasts requiring heavy-duty fastening solutions in industrial and construction environments. Engineered to DIN 933 standards, these screws offer superior durability and tensile strength for demanding structural applications. While they provide exceptional reliability under pressure, users should ensure proper size selection and matching nut compatibility to avoid mechanical failure in high-stress assemblies.
| Colour | Black |
|---|---|
| Model Part Number | 1261974 |
| Brand | Unifix |
The 10.9 designation refers to the bolt's mechanical properties, indicating a tensile strength of 1000 N/mm² and a yield strength of 900 N/mm².
While they are high-strength, the standard black finish is not as corrosion-resistant as stainless steel or galvanized options. They should be protected with a sealant if exposed to the elements.
DIN 933 is the German standard for hexagon head screws with a metric thread that is threaded up to the head (fully threaded).
If they have not been deformed or over-torqued beyond their elastic limit, they may be reusable, but for critical safety applications, it is standard practice to use new fasteners.
No, they are designed to be used with standard metric spanners or socket wrenches.
Ensure the thread pitch matches the tapped hole and clean debris or rust from the female thread before insertion.
Use a high-quality, non-worn socket or spanner that matches the exact metric size of the hexagon head.
Apply a rust-inhibitor spray or anti-corrosion coating, especially if used in non-climate-controlled environments.
To install, ensure the hole is correctly sized for the diameter of the setscrew to prevent stripping. Utilize a calibrated torque wrench to achieve the manufacturer-recommended tension, avoiding over-tightening which could compromise the steel's integrity. When selecting screws, always verify that the nut or threaded insert matches the thread pitch and diameter of the setscrew. Since these are high-tensile carbon steel, keep them stored in a dry environment to prevent oxidation, and consider applying a thin layer of machine oil or a suitable anti-seize compound if the assembly will be exposed to outdoor or moisture-heavy conditions.
