Nylon Wall Plugs & Screws

Which wall plug for brick, concrete or hollow walls?

• •Solid brick, concrete, stone and lightweight concrete: Mungo MN nylon plug (4 to 20mm), made from polyamide PA6, for wood, chipboard and metric screws, fitted before the fixture or through it. MNK is a collar version, and MNL a longer plug in 6 and 8mm.
• •Concrete, stone and brick, light duty: the grey universal nylon wall plug with a tapered point, for coach and self-tapping screws, with anti-rotation barbs and a countersunk end for a flush finish.
• •Hollow brick, hollow masonry, plasterboard and chipboard: Mungo MU multi plug. It knots behind the wall in a cavity, and its collar breaks away so it can be used through the fixture.
• •Fixing timber or aluminium frames straight through: nylon frame plugs, supplied with their screw, in lengths up to 300mm. More frame plugs are on our frame plug page.
• •Concrete, solid brick, solid block and stone, light duty: spaghetti roll plug, pushed into the hole to the depth needed and cut off flush.
• •No plug at all: Wall Katt screws go straight into plasterboard, timber and aerated concrete, and into concrete, brick and hollow block with a pre-drilled hole.
• •Aerated concrete (AAC): MEF Easy-Fix, a zinc plated steel fixing that needs no pre-drilling in aerated concrete (dense or aged material may need it).

Wall plug sizes and drill sizes

A wall plug size is the drill size: a 6mm plug goes in a 6mm hole. Drill deeper than the plug and use a screw long enough to pass through the fixture and the full length of the plug. For the MN plug, Mungo gives the drill depth and screw size for each plug, and the screw should be at least the plug length plus 5mm plus the fixture thickness (Mungo's anchorage depth is the plug length plus 5mm).

Mungo also publishes recommended tension loads for a single MN plug. They include a safety factor of 5, apply to Mungo MN plugs only, and assume a wood screw of the largest diameter listed and, in concrete, non-cracked concrete C20/25 or stronger. They must be reduced for shear, bending, combined tension and shear, reduced edge distance or spacing, and groups of plugs, and Mungo says the data must be checked by an engineer experienced in anchorage for the actual conditions. As a guide, 1kN is about 102kg.

Wall plugs on this page

The nylon and plastic wall plugs on this page, plus the Wall Katt and MEF fixings. More wall plugs (such as GN, GQ and MQ Quattro plugs) are on our other wall plug page, and more frame plugs on the frame plug page; both are linked at the foot of this page. Select a row to open it in the selector.

Nylon frame plugs on this page

A frame plug is a long nylon plug supplied with its screw, pushed through a pre-drilled timber or aluminium frame into the wall behind, so you fix the frame without marking out holes in the wall first. The size is the plug diameter (8 or 10mm); the length is shown as plug length / maximum fixture thickness, so 100/30 is a 100mm plug that fixes through up to 30mm of frame.

From Mungo's product guide and data sheets: MB plugs are for softer materials, MBR plugs for solid materials and MQL plugs are universal; a K in the code means a collar plug and XT a high performance version. The screw comes zinc plated, hot dip galvanised (F suffix) or 316 stainless (R suffix). Mungo's MB and MQL data sheets list the MB 10 and MQL 10 plugs for multiple use in concrete and masonry for non-structural applications under European Technical Assessments ETA-15/0068 and ETA-11/0008. The MQL sheet marks MQL 8 as not part of the assessment, and the sheets do not cover the MBR or MB 8 plugs. For anything structural, use the fixing the designer specifies.

1. Drill through the frame and into the wall at the plug diameter (no hammer drilling in hollow masonry or aerated concrete).
2. Clean the hole (not needed in hollow brick).
3. Push the pre-assembled plug and screw through the frame until the plug's collar meets the frame.
4. Tighten the screw until the collar is drawn tight, without over-tightening.

How to fit a wall plug in brick or concrete

From Mungo's MN installation guide, with the hollow brick drilling rule from the MU multi plug sheet:

1. Drill the hole at the plug size and deeper than the plug (see the drill depth in the MN table). In hollow brick, Mungo's MU sheet calls for rotary drilling, not hammer.
2. Clean the dust out of the hole (not needed in hollow brick).
3. Push the plug in flush with the surface, or through the fixture for through fixing.
4. Drive the screw through the fixture into the plug. The plug expands as the screw goes in.
5. Tighten the screw until the fixture is held firm.

Spaghetti roll plugs and Wall Katt screws

• •Spaghetti roll plugs: drill a 5.0 or 5.5mm hole deep enough for the screw or nail, clean it out, push the spaghetti to the full depth and cut it off, then fix through the fixture with a 6 or 8 gauge screw or a nail of at least 3.5mm. Green rolls are 5.0mm for 6 gauge screws; red rolls are 5.5mm for 6 or 8 gauge screws, in 5m and 50m rolls.
• •Wall Katt universal pan screws: a 6.5mm screw that needs no plug, for conduit and pipe saddles, light fittings, signage and brackets. No pre-drilling in plasterboard; pre-drill a 5.0mm hole in concrete, brick and hollow block, and pre-drill hardwood. Install with a non-impact driver.
• •MEF Easy-Fix: a zinc plated fixing for aerated concrete (AAC), used with wood, self-tapping or hex head screws and fitted before the fixture. Mungo lists it for indoor applications; pre-drilling may be needed in dense or aged material, and the harder the material the larger the drill.

Nylon wall plug materials

Mungo's MN and MU data sheets give those plugs as polyamide PA6 nylon, for indoor and outdoor use, and note that PA6 absorbs sound transmitted between the fixture and the wall. Our product data also lists the MNK, MNL and scaffold plugs as PA6 nylon; we hold no Mungo sheet for those. The universal plugs are grey nylon and the spaghetti rolls are plastic. Frame plug screws are zinc plated steel for dry, indoor conditions, hot dip galvanised, or 316 stainless for outdoor and coastal work.

Wall plugs in Adelaide

Allmat supplies wall plugs, frame fixings, masonry drill bits and screws to builders, electricians, plumbers and trade across Adelaide and South Australia. Add them to a quote with the rest of your list, and we will price the lot.

Questions