I require to drill screws into wall board (to hold a cistern in place) and believe 4.5x40mm screws will be sufficient (with wall plugs). This is the screws and wall plugs I have.
I draw your attention (circled in red) to the specified diameter of screw on the instructions of the pack.
I measured the diameter of the screw and took this photo.
As you can see, using a ruler, with each black vertical line representing a mm, that the diameter of the screw is in fact 4mm.
Is this normal practice to overstate the diameter of a screw or is this a mistake? The reason why I ask is I wish to purchase stainless steel screws to use with these wall plugs but am unsure of whether to buy 4mm or 4.5mm diameter screws?
I draw your attention (circled in red) to the specified diameter of screw on the instructions of the pack.
I measured the diameter of the screw and took this photo.
As you can see, using a ruler, with each black vertical line representing a mm, that the diameter of the screw is in fact 4mm.
Is this normal practice to overstate the diameter of a screw or is this a mistake? The reason why I ask is I wish to purchase stainless steel screws to use with these wall plugs but am unsure of whether to buy 4mm or 4.5mm diameter screws?