Wall plugs need brick, block or concrete to hold well. Plaster just will not do, because it has minimal holding power. It’s usually way too soft you see. Sure, if the wall is plastered with hard cement render and thin skimming coats, you might get away with some light to medium loads, but generally the plastic plug needs to be pushed into the wall itself so it’s entire length is into a brick, a block or concrete etc. Why? Because the way a wall plug works and holds in place …
Screws Explained:
Screw Gauge, Metric, Size, Clearance Holes, Pilot Holes & Wall Plugs I’ve explained this screw data in an easy to understand table because I find manufacturers recommendations are often vague and general, I mean; why not be specific? I understand there’s a ‘range’ but why not give us the ‘ideal’ measurement, because mostly we have a choice? The table below shows you: Metric equivalents to imperial gauge. What size pilot hole to drill in timber substrates for the best screw grip. What size clearance hole to drill through the timber being fixed. …