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The Range£6.81Visit shop Unifix Grade 10.9 Socket Csk Head Screws M3 X 8 - Q107991000300008000 - Box Of 500 - Grey
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This guide is for engineers, builders, and DIY enthusiasts requiring high-strength fastening solutions. The key benefit is the superior durability and reliability offered by Grade 10.9 steel, suitable for demanding tasks. A potential consideration is the specific metric size (M12 x 40) and black finish, which may influence aesthetic choices and compatibility with existing hardware. These screws are constructed from high-quality Grade 10.9 steel, adhere to DIN 7991 standards, and feature a socket countersunk head for flush installation, making them ideal for structural and mechanical applications needing a clean finish and robust performance. They come with a corrosion-resistant finish for extended lifespan.
| Colour | Black |
|---|---|
| Model Part Number | 5014196336046 |
| Brand | Unifix |
Grade 10.9 indicates a high tensile strength property class for steel fasteners, signifying superior strength and performance compared to lower grades like 8.8.
DIN 7991 is a German industry standard that specifies the requirements for countersunk head screws with a hexagon socket drive. It ensures consistency in dimensions and quality.
The corrosion-resistant finish offers protection, but for prolonged or highly exposed outdoor applications, monitoring for wear and potential additional protective measures might be advisable.
You will need a metric hex key (Allen wrench), specifically an 8mm size for M12 socket head screws.
A countersunk head allows the screw to sit flush or below the surface of the material it's fastening, providing a clean, smooth finish and preventing potential snags.
Typically, high-strength steel fasteners like Grade 10.9 are magnetic.
Each box contains 50 screws.
Ensure the receiving hole is properly countersunk to the correct angle and diameter for an M12 countersunk head screw according to DIN 7991 standards.
Verify that the mating thread or nut is also M12 and is clean and undamaged. Check for any obstructions in the thread.
Use the correct size hex key (8mm for M12). Apply steady, even pressure. Avoid over-tightening, especially in softer materials.
While the screws have a corrosion-resistant finish, extreme conditions can eventually affect them. Clean the area and consider applying a suitable protective lubricant or anti-corrosion compound.
Setup: These screws require a hex key (Allen wrench) of the appropriate metric size (typically 8mm for M12 socket screws) for insertion and tightening. Ensure the mating hole is countersunk to accommodate the screw head, allowing it to sit flush with the surface.
Compatibility: Designed to meet DIN 7991 standards and with an M12 thread size, these screws are compatible with standard metric M12 nuts and tapped holes. Ensure your application requires this specific size and thread pitch.
Care: To maintain the corrosion-resistant finish and ensure longevity, avoid prolonged exposure to harsh chemicals. Clean with a dry or slightly damp cloth. For heavily exposed applications, consider additional protective coatings if necessary, though the inherent finish is designed for durability.
