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The Range£9.79Visit shop Unifix Grade 12.9 Socket Head Cap Screws M5 X 30 - Box Of 200 - Grey
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The Unifix Grade 12.9 Socket Head Cap Screws are engineered for professionals and hobbyists who require high-tensile fasteners for demanding engineering, automotive, and construction projects. Manufactured to the rigorous DIN 912 standard, these screws offer superior structural integrity and a corrosion-resistant finish for long-lasting performance. While their high-strength rating makes them ideal for heavy-duty load-bearing applications, users must ensure they utilize the correct hex key size to prevent stripping the internal socket during installation.
| Colour | Grey |
|---|---|
| Model Part Number | 5014196341743 |
| Brand | Unifix |
The 12.9 rating indicates that these screws are made from high-tensile alloy steel with a minimum tensile strength of 1200 MPa and a yield strength of 1080 MPa.
While they feature a corrosion-resistant finish, they are not equivalent to stainless steel. They are best used in indoor or protected environments unless regularly maintained with protective oils.
No. You must use the correct metric hex key size corresponding to the screw diameter to prevent stripping the internal socket.
DIN 912 is a German standard that defines the dimensions, thread pitch, and geometry for socket head cap screws, ensuring global interchangeability.
Use of a thread-locking compound is recommended if the application is subject to heavy vibration to prevent the screw from loosening over time.
Verify you are using the correct metric size and ensure the key is not worn out. Use a high-quality hardened steel bit.
Check the hole for debris, burrs, or mismatched thread pitch. Do not force the screw as this may damage the threads.
Ensure you are using a calibrated torque wrench to stay within the manufacturer's recommended torque specifications for Grade 12.9 steel.
Installation requires a high-quality metric hex key (Allen wrench) or a hex bit socket for power tools. Always ensure your hex key is fully seated in the socket before applying pressure to avoid rounding out the head.
Regarding compatibility, these screws strictly follow DIN 912 dimensions. Before purchasing, verify your thread pitch and diameter requirements against the application's hardware manual. While the screws feature a corrosion-resistant finish, it is recommended to apply a light coat of anti-seize or machine oil if the project is located in a high-moisture environment or if you intend to remove the fasteners frequently for maintenance.
