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Rackhams£5.19Visit shop Rackhams M4 Socket Cap Allen Screw Bolt High Tensile 12.9 Bzp - 4 - 12Mm
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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 engineered for construction and engineering professionals who require high-strength fastening solutions for heavy-duty projects. These screws provide exceptional reliability and durability through their high-grade steel construction, though users should note that they require specific hex key tools for installation and are best suited for structural or mechanical assemblies where high tension is required.
| Colour | Silver |
|---|---|
| Model Part Number | 1355425 |
| Brand | Unifix |
Grade 12.9 refers to the material strength, indicating a high-tensile steel capable of withstanding significant force and stress.
Yes, you will need a hex key or Allen key that matches the size of the socket head.
They feature a bright zinc-plated finish for moderate corrosion resistance, but they are not stainless steel and may rust if exposed to extreme weather.
Yes, these screws are manufactured according to the DIN 912 standard.
While they can be used for wood, they are primarily designed for metal-on-metal industrial and engineering applications.
Ensure the hex key size matches the socket head exactly and check the socket for debris or metal shavings.
Confirm that the pilot hole is correctly sized for the screw diameter and thread pitch.
Clean the affected area and apply a light coating of machine oil or a corrosion inhibitor spray to prevent further oxidation.
To install, ensure you are using a high-quality hex key that matches the socket size precisely to prevent stripping the head. Always use a torque wrench if you are following specific manufacturer specifications for a mechanical assembly. While the bright zinc plating provides basic rust resistance, these screws are not stainless steel; for outdoor use in extremely harsh or marine environments, consider applying an additional anti-corrosion spray or grease. Store in a dry area to maintain the finish and structural integrity of the threads.
