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The Range£7.46Visit shop Unifix Grade 12.9 Socket Head Cap Screws M5 X 10 - Box Of 200 - Grey
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The Unifix Grade 12.9 Socket Head Cap Screws are designed for mechanical engineers, industrial fabricators, and serious DIY enthusiasts who require high-tensile strength and reliability for critical fastening applications. These screws offer superior load-bearing capacity and a secure fit thanks to their precision-engineered socket head design, though users should note that the bright zinc-plated finish is intended for corrosion resistance rather than heavy-duty outdoor exposure in harsh, acidic, or saline environments.
| Colour | Silver |
|---|---|
| Model Part Number | 1260235 |
| Brand | Unifix |
Grade 12.9 refers to a high-tensile property class of steel. It indicates a nominal tensile strength of 1200 MPa and a yield point of 90% of the tensile strength.
The bright zinc-plated finish provides moderate corrosion resistance, but they are best suited for indoor or controlled environments. For marine or high-saline areas, stainless steel alternatives are recommended.
No, a standard hex key (Allen wrench) of the appropriate size is sufficient for installation.
While they are intended for permanent assembly, they can be removed and reused if the threads and the hex socket are not deformed or stripped during removal.
Measure the distance from the underside of the head to the tip of the threads to ensure the bolt provides enough thread engagement for the thickness of the parts being joined.
Verify that you are using the correct metric hex key size and that the socket is free of paint, grease, or metallic debris.
Check that the hole is properly tapped and free of burrs; do not force the screw as this may damage the threads.
To ensure peak performance, match your screws with a high-quality hex key that fits the socket perfectly to prevent stripping. Always clean the receiving thread or nut of debris before installation to ensure the bolt seats completely. While the bright zinc plating is resilient, it is recommended to apply a light film of machine oil if the environment is humid. Do not over-torque beyond the recommended specifications for the specific bolt diameter to avoid exceeding the fastener's yield strength.
