coach bolt sizes explained

I simply bang a chopstick into the drilled hole as far as it will go, then break it off and in with the screw. Again, like the phillips Pozi has several size numbers. In fact, if any screw starts to get very tight, it’s best to stop and have a rethink before you break the screw or burst the material. I’m looking for a bit of help. This is the picture of the screw I bought. (paperback or eBook via amazon). Good luck because each type of wood and each type of screw behaves differently. Drill holes very slowly and carefully (SDS etc)and blow out the dust (seems worse on vertical holes as the bit doesn’t clear as well as horizontal holes). You can actually buy ‘socket box extensions’, but my experience finds that not many places keep them in stock. Definitely not a brown plug as they are 7mm and blue plugs are usually 10mm so neither are any use in an 8mm hole. Getting too old for new tricks maybe? If you’re going into drywall etc. It’s difficult to be exact as it really does depend on the plug and the cleanness of the hole drilled etc. Cheers and good luck! However, when I look at the table, an 8-guage screw is ~4mm in diameter. (Paperback and eBook via amazon). p.p.p.s…… nope, that’s all . I don’t have any boxes to match up against and, if I buy any it rather defeats the object! I ask because The Home Depot guy was dropping the screw into a hole in which the threads would fit, and I thought maybe I was doing it wrong. Once the pilot hole has been drilled, the coach screw can be driven directly into the wood. Metric screw sizes provide a diameter and length in mm. Yes, the leverage could be considerable. Don’t forget that the weight is mostly in ‘shear’ too; i.e. but somehow I just don’t trust them. Do I use plugs + screws? If you have some boxes of screws you can use them to help you learn the thickness of each gauge of screw, then it’s a simple matter of sorting out the length with most folks can do pretty accurately with practice. My only comment would be to get the fasteners as deep into the wall as you can practically go, preferably below the top course. Use the dimensions of your bolt to determine the appropriate size nut. My only comment would be to get the fasteners as deep into the wall as you can practically go, preferably below the top course if you say they are laid flat. Cheers It really is a case by case/ trial and error (or experience of course!) Where I live in Indochina we can only get hardwood chopsticks. Well, what you suggested would of course work, but a better way would be to extend the box forward. Ian Any assistance will be appreciated. Definitions of terms are located below the chart. Any really bad holes you could resin fill maybe and push the screw into it (seen this done with outdoor ‘no-nails’ type stuff in a pinch, he left the screw a couple of turns proud and nipped it up after 24hrs… big dodgy but what can you do sometimes!). To be fair, the manufacturers don’t know what you’re fixing into and they seem to assume solid concrete! Ian. Best thing to do is measure the diameter of the plug at the top I think. We have hung really large mirrors (like six feet tall heavy/ gilded things) on pairs of thick shanked screws in brown plugs with no problems. Fischer used to make an 8mm plug I believe (all their plugs are grey.) Thank you, thank you, thank you for your ‘plain English’ explanations. Cheers *No spam... ever. However, I have a cunning plan……. (eBook via amazon). For both phillips and pozi the MAJORITY of average sized screws would use either a PH2 or a PZ2 driver head. I have a large box of mixed screws which I would like to sort into size order. It is my pet hate when a manufacturer says 6mm to 9mm (random example) in their installation specs, OK, I get that there is a range, but since I am stood here with a tape and can make it what ever I want, I want the optimum size! Ian, I have 2 inch screws to hang a shelf and was wondering what size of raw plug to use for them any help would be appreciated. I would start with a 12g or 5.5mm to be honest. These are the two most common sized plugs used in the UK. I assume the notional screw size is the same as the smallest hole it will fit in? I am a little bit exaggerated when I bought the big coach screws for my mirror, I am just scared that the mirror will fall off from the wall if I use small screws, lol. To get them sorted out we grabbed a piece of cardboard and taped each screw size to it, to help him visually judge what size screw he had picked up. Let me know how you get on. Buy Coach Bolts & Screws at Screwfix.com. Ian, Tried to find some info about screws, read a bit and then your picture jumps up on my screen – glad you got top spot on google, and thanks for the info. 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Just that sometimes it’s best to sink the plugs into the wall a little (if the screws are long enough). I hope you can help. what if you are trying to buy a matching screw? Let me know how you get on. The mirror will be hanged in the dining here at home, with a measurements of 72” x 36” inches and according on the box the mirror weigh 35kg. Just a thought … I’ve got a set of drill bits in a nice plastic box. You can find them with a big magnet or a wall/metal detector etc. Except for the very lowest grades, metric nuts and bolts all carry identification markings which indicate their strength. Re the pilot hole, yes you can go a fraction smaller than the shank size in most cases, but in thin particle or chip board I’d be careful. Ian. No nonsense, concise information and table for all you need to know when using screws, drills and plugs. A Coach Screw is a heavy duty screw which has a square or hexagonal head and an externally threaded cylindrical shaft that tapers to a point at the tip. Wow! You’re most welcome Janice, glad it helped . This post talks about wood screws… Especially as the plaster has little holding strength when hanging heavy items. I’m not quite understanding your question, sorry! Important information Good luck with your jobs! Masonry: If you are using a coach screw to fix heavy objects to masonry or brickwork you will need to drill a hole, using an SDS Drill Bit. The length of a bolt is also stated by the measurement from under the head to the end, but the length of the thread is determined by the diameter, as shown above. .tg .tg-yz3o{color:#010066 !important;border-color:#010066;text-align:center;vertical-align:top} ), then a red 6mm plug is fine. if you’ve got a 50mm long plugs and 75mm long screws you want to push the plug into the wall 20mm or so. Ian. - - - - Call 24/7 on: 03330 112 112 Call 24/7: 03330 112 112 Shop by Product Code Need Help. Is there a tip on drilling into plaster walls?

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