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multi-purpose dowels

Universal wall plugs are the workhorse fixing of electrical installation: one plug type for concrete, brick, masonry and more. At WATT24 you will find all-purpose plugs in all common sizes for everyday installation work.

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Employee Purchasing from Troisdorf

Great advice and friendly service. I was helped immediately and competently with any questions. Gladly again.

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Office Manager from Frankfurt a.M.

Goods are well packaged and arrive safely, which is important to me. My mail was answered immediately. 

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Master carpenter from Wiesbaden

Had to replace a lamp, but the same was no longer available. Great advice, found a suitable replacement and delivered it quickly.


What are universal wall plugs used for?

Universal wall plugs (also called all-purpose plugs or expansion plugs) are designed for solid substrates: concrete, solid brick, calcium silicate and hollow brick with a low void content. As the screw is driven in, the plug expands and creates a secure friction grip in the masonry. They cover the vast majority of standard fixing tasks in electrical installation, from cable trunking brackets to flush-mounted device boxes.

For hollow substrates such as plasterboard or drylining, cavity wall fixings are the right choice. For heavy loads in concrete, heavy-duty anchors or chemical fixings are available in the full wall plugs and anchors overview.


FAQ: Universal wall plugs

What is a universal wall plug?
Universal wall plugs (all-purpose plugs) are expansion-type fixings suited to a range of substrates: concrete, solid brick, hollow brick, calcium silicate and, in some cases, plasterboard. As the screw is driven in, the plug expands and grips the surrounding material. They are the standard fixing for the majority of installation tasks in electrical work.
Which substrates are universal wall plugs suitable for?
Universal plugs perform reliably in solid substrates such as concrete, solid brick and calcium silicate. They also work in hollow brick and perforated block provided the void content is not too high. For plasterboard and drylining, dedicated cavity wall fixings are the better choice.
Which screw size goes with which universal plug?
Universal plugs are rated for specific screw diameters as stated on the packaging. Common pairings: Ø 6 mm plug for screws M3.5–M5, Ø 8 mm plug for M4–M6, Ø 10 mm plug for M6–M8. The drill bit diameter matches the plug diameter.