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The Range£5.80Visit shop Unifix General Purpose Chippy Woodscrews 3.5 X 30Mm - Bag Of 25 - Box Of 125 - Grey
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The Unifix General Purpose Chippy Woodscrews are an ideal choice for carpenters, DIY enthusiasts, and woodworkers who require reliable fasteners for general joinery projects. These screws are engineered for durability, featuring a Pozi countersunk head that ensures a flush, professional finish and strong grip. While these screws provide exceptional performance in woodworking, users should note that they are intended for standard applications and may require pilot holes in denser hardwoods to prevent wood splitting.
| Colour | Grey |
|---|---|
| Model Part Number | Ub9Chippy/185 |
| Brand | Unifix |
Yes, the ZYP coating offers good corrosion resistance for standard outdoor woodworking, but they are not intended for saltwater or high-moisture environments.
A general rule is to use a drill bit that is slightly smaller than the shank of the screw, excluding the threads.
Yes, they work well with MDF, though a pilot hole is strongly recommended to prevent the material from splitting.
The 5.0mm refers to the diameter of the screw, while 70mm represents the total length of the screw from the top of the head to the tip.
No, these are designed specifically for timber and wood-based materials. Use appropriate masonry anchors for concrete.
This specific variant comes in a convenient pack of 125 screws.
Ensure you are using the correct size Pozi bit and applying firm, steady pressure. Increase the pilot hole size slightly if driving into dense timber.
Always drill a pilot hole when working near the end grain or edge of a board to relieve tension.
Check that your drill clutch is set correctly and that the screw has not encountered a knot or hidden hardware in the timber.
To achieve the best results, ensure you are using the correct size Pozi-drive bit that matches the screw size. Always drive the screw at a consistent speed to avoid stripping the head. While the screws are designed to be driven directly, drilling a pilot hole approximately 70-80% of the screw's diameter will yield the cleanest results and prevent wood damage in softer timbers. Store the remaining screws in a dry, cool environment to maintain the integrity of the ZYP coating. If you are working in highly corrosive environments, such as coastal areas, consider using stainless steel alternatives instead.
