Screw Cover Caps Explained: Types, Sizes and How to Choose the Right One
On June 4, 2026
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Screw Cover Caps: Chrome, Plastic, Hex Head &
Self-Adhesive Options Explained
Screw cover caps are used to hide and protect visible screw heads, giving a clean, professional finish. This guide explains the different types of screw cover caps, when to use them, and how to choose the right option for your job.
In this guide:
What are screw cover caps?
Screw cover caps are designed to clip, stick or screw over the head of a fixing to hide it from view. They improve appearance and can also offer protection against moisture, dirt and corrosion.
They are commonly used where fixings are visible, such as furniture, cladding, kitchens and external installations.
Types of screw cover caps
Plastic screw cover caps
These are push-fit caps designed to cover standard screw heads. Available in colours such as white, black, brown, grey and oak finishes, they are ideal for general fixing work.
Hinged screw caps
Hinged caps are fixed under the screw head and then clipped shut. They provide a secure cover and are commonly used for visible fixings in panels and fittings.
Hex head cover caps
Designed to fit over hex head screws, these caps are widely used in roofing and cladding. Available in a wide range of colours, they allow fixings to blend into the surface.
Self-adhesive cover caps
These stick directly over the fixing point and are commonly used in furniture and cabinetry. Available in woodgrain and colour-matched finishes.
Threaded metal screw caps (including brass and chrome finishes)
Often used for decorative applications, these screw-on caps are typically made from solid brass with finishes such as polished chrome, satin and brass.
Concrete screw cover caps
These caps are designed specifically to cover concrete screw fixings. Available in finishes such as white, light oak and mahogany, they are commonly used in window frames, masonry fixings and external installations where a neat, colour-matched finish is required.
Quick tip:
Matching the cap colour to the fixing or surface makes a big difference to the final finish. Hex head caps are especially useful for colour-matching roofing sheets and cladding.
Matching the cap colour to the fixing or surface makes a big difference to the final finish. Hex head caps are especially useful for colour-matching roofing sheets and cladding.
Sizes and compatibility
Choosing the correct size ensures the cap fits securely and fully covers the screw head.| Cap Type | Typical Size | Compatible Screws |
|---|---|---|
| Plastic caps | 3.5mm – 4.2mm | Standard screws |
| Hinged caps | 3.0mm – 6.0mm | Countersunk screws |
| Hex caps | 16mm / 19mm | Hex head screws |
| Self-adhesive | 13mm / 18mm | Flat surfaces |
Where are screw caps used?
Screw cover caps are used across a wide range of applications:
- Furniture and cabinetry
- Wall panels and interior fittings
- Roofing and cladding systems
- Kitchen and bathroom installations
- External fixings where appearance matters
How to choose the right screw cap
Consider the screw type
Make sure the cap is designed for the screw head you are using.
Think about the finish
Choose a colour or material that matches the surface or fixing.
Check the environment
For outdoor use, select durable caps such as hex head or metal options.
Choose the right fixing method
Push-fit, hinged, adhesive or threaded caps all suit different applications.
Trade tip:
For external applications like cladding, hex head caps provide a cleaner finish and help protect fixings from weather exposure.
For external applications like cladding, hex head caps provide a cleaner finish and help protect fixings from weather exposure.
How to fit screw cover caps
- Install the screw fully
- Check the head is flush and secure
- Fit the cap (push, clip or screw depending on type)
- Ensure it sits evenly
Common mistakes to avoid
- Using the wrong size cap
- Forcing caps onto incompatible screws
- Using indoor caps outdoors
- Not matching colour to surface
- Applying adhesive caps to dirty surfaces
Cover Caps
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Timco Black Screw Cover Caps - To fit 3.5mm to 4.2mm Screw - Pack of 100 £6.66 ex VAT(£7.99 inc VAT)
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Timco Cream Screw Cover Caps - To Fit 3.5mm to 4.2mm Screw - Pack of 100 £6.66 ex VAT(£7.99 inc VAT)
Threaded Screw Caps
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Timco Threaded Screw Caps - Solid Brass - Satin - 12mm £2.49 ex VAT(£2.99 inc VAT)
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Timco Threaded Screw Caps - Solid Brass - Polished Brass - 16mm £3.41 ex VAT(£4.09 inc VAT)
Hex Cover Caps
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Timco Hex Head Cover Caps - Anthracite - 19mm £16.08 ex VAT(£19.29 inc VAT)
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Timco Hex Head Cover Caps - Svelte Grey - 16mm £15.74 ex VAT(£18.89 inc VAT)
Concrete Screw Cover Caps
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Timco Concrete Screw Cover Caps - White - WHITE £0.74 ex VAT(£0.89 inc VAT)
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Timco Concrete Screw Cover Caps - Light Oak - LIGHT OAK £0.74 ex VAT(£0.89 inc VAT)
Shop screw cover caps at Fast Fixings Online
We stock a wide range of Timco screw cover caps including plastic caps, hinged caps, hex head caps, self-adhesive caps and threaded metal caps in a variety of colours and finishes. Browse the full range for fast UK delivery.
FAQs
What are screw cover caps used for?
They are used to hide screw heads and improve the finish of visible fixings.
Do screw caps protect against corrosion?
Some caps can help reduce exposure to moisture, especially in external applications.
What size screw cap do I need?
This depends on the screw diameter and head type. Always match the cap to the screw specification.
Can you use screw caps outdoors?
Yes, but choose suitable types such as hex head caps or durable materials.


