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London Brackets

Discussion in 'General Discussion' started by dan2002, 5 Jul 2021.

  1. dan2002

    dan2002

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    Hi, I had a had question. I am putting some shelves up. I need screws for the bracket so I can screw it onto the shelf. I am using London Brackets (hole size - 4mm). Will it be alright if I use 3mm x 12mm screws or does the head screw size need to be 4mm? The thickness of the shelf is 16mm.
     
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  3. Screw sizes do not refer to the head.

    The head needs to be large enough not to go through the hole - washers can be used.

    You arent going to be able to get very big screws given how short they will have to be.

    They are ony there to stop the shelf moving forward - put the screws against the front edge of the holes.
     
  4. dan2002

    dan2002

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    Hi. Are you sure? What does the size 4mm mean then? The sizes are written as 4mm x 12mm. I am assuming the 12mm is the length of the screw and the 4mm is the head size.

    On the London Bracket description it says this:
    Each bracket has 6 x 4mm holes to accept 4.0mm [imperial size 8] screws.
     
  5. Think about it - if a bracket has holes x mm in diameter, what use are screws with x mm heads?
     
  6. ETAF

    ETAF

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    Screw Diameter = Size 8 or now in metric 4mm
    This screwsize table may help, I'm not sure what site i got that from a few years ago, but have it printed out on my tool/screwbox, along with rawlplug info
     

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  7. dan2002

    dan2002

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    I am thinking what I said earlier is correct? So 4mm x 12mm screws are the one?
     
  8. dan2002

    dan2002

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    Didn’t understand one bit of it
     
  9. Yup
     
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  11. dan2002

    dan2002

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    Ok thank you for that information. Also the thickness of the shelf is 16mm. Would that screw length (12mm) be good?
     
  12. You cant go much longer.

    What sort of head?
     
  13. dan2002

    dan2002

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    It is a pozi head. I think it should be fine. Should I go for 13mm instead? So: 4mm x 13mm

    Does that sound good? Also do you measure screws from the head to the end?

    I have attached a picture of the screws
     

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  14. ETAF

    ETAF

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    the pdf i posted explains how screws length are measured
    Countersink from top of head, Round head from the bottom flat
     
  15. Should be the length from where the screw would normally come to rest, and the tip. So countersunk woodscrews, from the flat of the head. Raised countersunk, from where the countersinking ends. Cheese/button/pan/round/etc, from the underside of the head.

    Countersunk are not the right sort for this application.

    No way are the screws in that photo 4x16.
     
  16. dan2002

    dan2002

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    This is the name of the screws: MULTI PURPOSE WOOD SCREWS POZI

    Remember I am getting screws with 13mm in length. I am sure these would be fine for the shelves. I have discussed it with the seller.
     
  17. dan2002

    dan2002

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    I am going to use London Brackets. What size would be recommended? I have attached a picture of the sizes.

    I was thinking of: 150mm x 125mm
     

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