Diall Countersunk Screw - Silver
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B&Q£8.90Visit shop B&Q - Countersunk Zinc-Plated Carbon Steel Screw (Dia)4.8mm (L)38mmPack Of 100
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B&QB&Q - Countersunk Zinc-Plated Carbon Steel Screw (Dia)4.8mm (L)38mmPack Of 100
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Product Information
Full details
This pack of 100 Diall countersunk screws, finished in silver, is designed for DIY enthusiasts and general builders seeking durable, reliable fasteners for a variety of projects. The key benefit is their robust carbon steel construction and zinc plating, offering good corrosion resistance for indoor use. A potential caveat is that they are fully threaded, which might affect depth perception in some applications where partial threading is preferred.
All features
| Colour | Silver |
|---|---|
| Brand | Diall |
Extended Product Information
FAQs
What material are these screws made from?
These screws are constructed from durable carbon steel and are zinc plated for enhanced corrosion resistance.
What does 'countersunk' mean for a screw head?
A countersunk head is designed to sit flush with or below the surface of the material it is fastening, creating a smooth, finished appearance.
Are these screws suitable for outdoor use?
While the zinc plating offers some corrosion resistance, these screws are best suited for dry, indoor applications. For outdoor use, screws with more robust coatings like galvanised or stainless steel are recommended.
What is the advantage of being fully threaded?
Fully threaded screws provide maximum thread engagement with the material, offering excellent holding power and preventing pull-out.
How many screws are included in this pack?
This pack contains 100 countersunk screws.
What is the length and diameter of these screws?
The screws are 38mm in length and have a diameter of 4.8mm.
What type of screwdriver should I use?
You should typically use a PZ2 or PH2 screwdriver bit, depending on the exact recess of the screw head.
Troubleshooting
Screw head strips during driving.
Ensure you are using the correct type and size of screwdriver bit (PZ2 or PH2). Apply firm, consistent downward pressure while driving. If the head is already damaged, try using pliers to grip and remove it.
Screw does not sit flush.
The pilot hole may not be deep enough, or a countersink recess was not created. Re-drill a countersink hole to accommodate the screw head, or ensure the pilot hole is sufficiently deep for the entire screw length.
Screw feels loose after driving.
The pilot hole may be too large for the screw diameter, reducing thread grip. For a stronger hold, consider using a slightly larger screw or filling the pilot hole with wood glue and toothpicks before re-drilling a pilot hole.
Rust spots appearing on screws.
This indicates prolonged exposure to moisture. While zinc plating offers some protection, it is not suitable for wet or outdoor environments. Move the product to a dry storage location. Minor rust can sometimes be cleaned with a wire brush, but re-plating is not feasible.
Pros and Cons
Pros
- Durable carbon steel construction.
- Zinc plating offers good corrosion resistance for indoor applications.
- Countersunk head provides a clean, flush finish.
- Versatile 38mm length and 4.8mm diameter for various tasks.
- Fully threaded design maximizes grip.
Cons
- Primarily suited for indoor use due to zinc plating limitations in harsh environments.
- Fully threaded design may not be ideal for applications requiring controlled pull-out or material compression.
- Silver colour might not match all aesthetic requirements.
- Pack size of 100 may be insufficient for very large projects.
Setup, Compatibility & Care
Setup: These screws require a pilot hole drilled into the material. The pilot hole diameter should be slightly smaller than the screw's core diameter (excluding threads) for wood. A countersink drill bit can be used to create a recess for the screw head to sit flush. Use a screwdriver or drill with an appropriate driver bit (typically PZ2 or PH2, depending on the exact screw head recess) to drive the screws.
Compatibility: Compatible with most standard drilling and driving tools. Suitable for use with softwood, hardwood, and some composite materials. Ensure the screw length is appropriate for the combined thickness of the materials being joined.
Care: To maintain their appearance and prevent corrosion, store these screws in a dry environment. Avoid exposure to moisture and high humidity. Clean any dust or debris from the screws after installation using a dry cloth.