What if the plug spins in the hole?

Stop tightening and remove the load. The hole may be oversized, dusty or in weak material, or the screw may be wrong. Check the specified sizes and wall condition. Do not pack the hole with paper or assume a larger screw is safe; use a manufacturer-approved repair or a suitable new fixing position.

Can I use this method on plasterboard?

No. A hollow plasterboard wall needs a fixing designed for that construction. A plug intended to expand in solid masonry must not rely on the plasterboard alone.

How deep should I drill?

Use the minimum hole depth specified for your exact plug, and account for the wall finish as instructed. Plug length alone is not enough to determine drill depth or screw length.

Does a clear detector reading mean I can drill safely?

No. Detectors have limits and may miss services. Use building information and visible cable or pipe routes as well, follow the detector instructions, and isolate relevant electrical circuits after scanning. If you cannot establish a safe position, stop and get competent help.

Guides/Home/How to Install a Wall Plug and Screw

How to Install a Wall Plug and Screw

Install a nylon wall plug and matching screw for a light-duty fitting in sound solid brick or concrete. This guide does not cover plasterboard, hollow or aerated blocks, tiled walls, heavy loads or safety-critical fixings.

For a light picture-hanging project with a wall-appropriate fixing, see How to Hang a Picture Frame Straight.

Updated Nov 12, 2026

25 min5 stepsIntermediatenew

A person checks a solid masonry wall with a cable and pipe detector before marking a fixing position.

AI illustration

Step 01 / 05

Identify the wall and check the fixing position

Confirm from reliable building information that the fixing will go into sound solid brick or concrete, not just plaster or a hollow lining. Check both sides of the wall and likely cable and pipe routes. Scan the area with a suitable detector following its instructions; a clear reading alone does not prove it is safe. After scanning, isolate the relevant electrical circuits before drilling. Do not drill if the wall construction or services remain uncertain; get competent help. Avoid cracked masonry, mortar joints and positions too close to edges. Follow the fixing manufacturer's spacing and edge-distance limits. This method is not for grab rails, overhead loads or other safety-critical fittings.

Guide progress1 / 5

1. Identify the wall and check the fixing position
Instructional illustration generated with AI for Howmigo.
Confirm from reliable building information that the fixing will go into sound solid brick or concrete, not just plaster or a hollow lining. Check both sides of the wall and likely cable and pipe routes. Scan the area with a suitable detector following its instructions; a clear reading alone does not prove it is safe. After scanning, isolate the relevant electrical circuits before drilling. Do not drill if the wall construction or services remain uncertain; get competent help. Avoid cracked masonry, mortar joints and positions too close to edges. Follow the fixing manufacturer's spacing and edge-distance limits. This method is not for grab rails, overhead loads or other safety-critical fittings.
2. Match the plug, screw and drill bit
Instructional illustration generated with AI for Howmigo.
Use a plug approved for the actual wall material and the fitting's intended load. Read its instructions for drill diameter, minimum hole depth, screw diameter and screw length, allowing for the fitting and any surface finish. Do not choose by plug colour alone. For example, a specified 6 mm hole needs a 6 mm bit (about 0.24 in); do not substitute a 1/4 in bit, which is wider. Thin plaster must not replace the required anchorage in masonry; thick plaster or a cavity needs a different fixing design. Mark the hole through the fitting, remove the fitting and set the drill's depth stop to the specified depth.
3. Drill a straight hole to the specified depth
Instructional illustration generated with AI for Howmigo.
Put on safety glasses and appropriate respiratory and hearing protection. Use suitable on-tool extraction for masonry dust; keep other people away from the work area. Hold the drill square to the wall with both hands, using the auxiliary handle if supplied. Start slowly without hammer action so the bit stays on the mark. Use hammer action only when suitable for the masonry and permitted by the drill and fixing instructions. Drill straight to the depth stop without rocking the bit or enlarging the hole. Stop immediately if you meet metal, an unexpected void or a different wall material; do not force through it.
4. Clean the hole and insert the plug
Instructional illustration generated with AI for Howmigo.
Stop the drill and remove it from the hole. Clean the hole as the fixing manufacturer specifies, using an appropriate hole brush and masonry-dust extraction. Do not blow dust out with your mouth or use an ordinary household vacuum for fine masonry dust. Check that the hole is round, sound and deep enough. Push the plug in to its specified seating position; for a standard collared plug in exposed masonry, the collar normally sits flush with the surface. If it will not seat, remove it and check the hole rather than forcing it. If it drops in loosely or the masonry crumbles, do not install the fitting.
5. Fit the screw and check the fixing
Instructional illustration generated with AI for Howmigo.
Position the fitting over the plug and pass the compatible screw through its mounting hole. Tighten with the matching hand screwdriver until the fitting is snug, following any specified torque. Stop if the plug spins, pulls out or the screw cannot tighten; do not compensate by overtightening. If the fitting requires several fixing points, install every one as instructed. Check that it sits firmly without movement, then use it only within the manufacturer's load and installation limits. A hand check is not a load test. Do not use a loose fixing; remove the load and correct the hole or seek advice.