What should I do about a hole close to a plug that is too wide?

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Gauge, metric, size, clearance holes, pilot holes & wall plugs.

Which one to choose?

Here’s a table of screw data I’ve put together because I find manufacturers recommendations are often very general, I mean; why not be specific? I understand there may be a ‘range’ but why not give us the ‘ideal’ measurement?

The chart 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. Which size plastic wall plug to use with each screw size or gauge.

Righty-ho, lets jump right in…. (you can download the PDF of this table at the bottom)

(click to download and print the screws explained table as a PDF to keep for reference)

Screwfix, my fave supplier in the UK stock all the above screws and plugs at good prices and buying from them via this link (points up and a little to the left!) helps keep me in coffee...

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