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The Range£8.34Visit shop Unifix Coach Screws Hexagon Head Din 571 Bright Zinc Plated - M6 X 75 (Box Of 50) - White
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The Unifix Coach Screws DIN 571 are designed for contractors and DIY enthusiasts who require high-strength fastening solutions for heavy-duty timber applications. These M8 x 75 fasteners provide exceptional holding power thanks to their robust design and hexagon head architecture, making them ideal for structural wood projects; however, they require pre-drilling to prevent timber splitting during installation.
| Colour | White |
|---|---|
| Model Part Number | DIN 571 |
| Brand | Unifix |
Yes, pre-drilling with a bit slightly smaller than the screw diameter is highly recommended to avoid splitting the wood.
The bright zinc plating provides corrosion resistance for standard outdoor use, but they are not recommended for direct coastal or marine exposure.
These screws typically require a 13mm spanner or socket wrench for installation.
These are designed for wood; to use in concrete, you must use a suitable wall plug or anchor sleeve.
It is a German standard that defines the dimensions, thread pitch, and material quality for hexagon-head wood screws.
Ensure the pilot hole is the correct diameter and consider applying a small amount of lubricant to the threads.
Stop immediately, remove the screw, and drill a larger pilot hole before re-inserting.
Ensure the socket or wrench is fully seated and is the correct metric size for the M8 head.
For optimal installation, mark your pilot hole location accurately. Using a drill bit slightly smaller than the core diameter of the screw—typically 6mm for an M8 screw—is recommended to guide the thread without compromising holding power. Tighten the screw using a 13mm socket wrench until the head is flush with the timber surface. To maintain the integrity of the zinc coating, avoid over-torquing, which can strip the threads or damage the plating. Store in a dry, cool environment to prevent premature oxidation.
