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The Range£15.06Visit shop Unifix Grade 12.9 Socket Head Cap Screws M6 X 50 - Box Of 200 - Grey
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The Unifix Grade 12.9 Socket Head Cap Screws are precision-engineered fasteners designed for professionals and DIY enthusiasts requiring maximum tensile strength and reliability in high-stress applications. Built to DIN 912 standards, these high-quality steel screws feature a socket head design for secure fastening, though users should note that the black surface treatment, while durable, is primarily suited for indoor or controlled environments to prevent corrosion.
| Colour | Black |
|---|---|
| Model Part Number | 1262019 |
| Brand | Unifix |
Grade 12.9 represents the tensile strength of the steel, with the 12 indicating a nominal tensile strength of 1200 MPa, making it one of the strongest standard steel bolts available.
The black finish provides minimal corrosion protection. They are best used in indoor or dry settings and are not recommended for direct exposure to rain or salt air.
DIN 912 is a German industrial standard that defines the dimensions, thread pitch, and tolerances for hexagon socket head cap screws.
Yes, but use caution to avoid over-torquing, which can damage the internal hex drive or the surface of your material.
You need a standard hex key (Allen key) matching the size of the internal socket.
The socket size is incorrect or the hex key is worn; replace the tool with a fresh one or verify the metric size matches your specific screw.
The environment may be too humid; clean the area with a wire brush, apply a rust-inhibitor, and consider switching to stainless steel alternatives for that specific environment.
For optimal installation, always ensure you are using a high-quality hex key that matches the socket size exactly to prevent 'rounding out' the internal hexagonal drive. Because these are high-strength steel fasteners, it is recommended to apply a light machine oil during installation to prevent seizing, especially in recurring disassembly scenarios. Store the screws in a cool, dry area; the black treatment is not a substitute for galvanization, so avoid exposure to saltwater or high humidity to maintain the integrity of the finish.
