What size is this wallplug, and then what drill size (and type) would I use for brick?

Question

I'm trying to hang a hose "butler" from Home Depot (Model CHH200HB). It comes with three wallplugs and screws, so should be simple, but there is no sign of what size the plugs or screws are, nor which drill size to use. Can anyone help? Here are the plugs and screws, with one of the plugs in a gauge:

So it looks like the outer diameter of the plug is 5/16" -- that's at the widest part (and these plugs have no flange). Does that immediately tell me the drill bit too should be 5/16"? Seems obvious I suppose, but the general wisdom seems to be that if you've drilled the proper hole, the plug should be very tight, even needing a hammer to insert. That might then imply I should use the next size down, but what exactly is the "next" down from 5/16? I have one that is 1/16 down; i.e. 4/16, or a quarter inch. But how do I know that's the right one versus, say, one that is 1/32 down; i.e. taking 5/16 = 10/32, then a 9/32" bit (if there even is such a thing)?† And of course that could get even finer grained. Instead of 1/4", or 9/32", how about 19/64"?

Second, if I'm drilling into brick, what type of drill do I need -- i.e. do I need a special brick-and-other-fairly-hard-stuff bit? I have one of those yellow boxes of Dewalt bits you find in Home Depot, but I don't know what type they are. I think I'd have bought a general-purpose-ish set, meaning not just for wood, but do these look like they'll handle brick?

If I do need something like a hammerhead, then all I have are these UK/European bits:

and I have no idea how to relate those numbers to any other screw/drill/etc numbering system on the planet.

Finally, would anyone else agree with me that while there are plenty of bad things in the world, including possible imminent nuclear war, antibiotic-resistant bugs, and too many TV shows with the words "The Real Housewives of..." in the title or with Simon Cowell as a panel member, the biggest source of misery is the lack of standardization on screw/drill/etc diensions?††

thanks!

† FWIW, I tried to gauge the screw diameter too (not that it matters, I guess, since if I get the plug's hole right, I implicitly accommodate the screw), but it's hard because the threads are quite deep. On the gauge, it sits around 7/32", or maybe 13/64".

†† Although if it were a competition, then screw dimensions would get a good run for its money by the corresponding issue in cooking and baking (I mean, in what universe is a "cup" an appropriate unit for measuring mass -- really?)

Answer 1

Use the Black & Decker drill bit for masonry. 8 mm is compatible with the 5/16" size you gauged. If you choose, for a guaranteed tight fit, use the 7 mm drill first and if the insert is too tight, go up to the 8 mm. Even if the insert slips into the hole, the little "wings" should keep it from spinning in the hole until the screw goes in far enough to swell the plastic to a tight fit.

After the hole is drilled a little extra deep, do what you can to blow the dust out, so the anchor grips the actual hole, not the dust in it.

Answer 2

If you have a 7,5mm drill tip use that, otherwise drill a 7mm hole first, try putting in the plug (it should barley fit). If you see it's impossible to insert, enlarge the hole with a 8mm tip. Also you can go at local retailer and buy few 7mm 'fishers' and use them instead, suggest 'empty wall' version that is foine for both 'full' bricks and hollow bricks.

PS: Happy Easter

Answer 3

The correct term for your wallplug dodad is an "Anchor". Perhaps they are wallplugs in your world but in my world they are anchors ( then again i have happy little trees in my world thanks to Bob Ross ). They really are not the correct anchor to use in masonry.

Here is an informative article How to Choose and Use Concrete Fasteners, Masonry Screws