Screws

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  • July 18, 2019 at 7:08 pm #35000
    johnbarryjohnbarry
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      @johnbarry
      Forumite Points: 13

      I purchased these finger plates. They don’t come with screws but I have some. They arrived the holes are countersunk but the screw head (on the screws I have) are still a little big (7mm) and I am frightened of catching on them.

      The holes are 6mm diameter (including countersink) so I am after screws with a 4 to 4.5mm head.

      I have searched many but I am finding they don’t understand a brumy or I don’t understand the head or thread size, I mean what the —– is M2.

      So I am after 8 to 15mm screw length with a 4mm to 4.5mm head in diameter.

      like this

       

      Cheers
      John

      July 18, 2019 at 7:33 pm #35001
      BorisBoris
      Participant
        @boris
        Forumite Points: 0

        John

        How about ?

        https://www.ebay.co.uk/itm/Zinc-BZP-SOLO-WOODSCREW-DOUBLE-COUNTERSUNK-SOLOC-Screws-3-5-4-0-4-5-5-0-6mm/254269284772?hash=item3b33a161a4:m:m_9yHItR6FpZfiAZtwYXbBw

        Never trust an atom - they make up everything !

        July 18, 2019 at 7:40 pm #35005
        johnbarryjohnbarry
        Participant
          @johnbarry
          Forumite Points: 13

          nice one I ordered some 4mm x 15mm sadly the 4.5mm start at 40mm (length),

          Them should do, thanks.

          Cheers
          John

          July 19, 2019 at 1:56 am #35007
          wasbitwasbit
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            @wasbit
            Forumite Points: 245

            M2 is a machine thread (the type which takes a nut) where the shaft is 2mm thick.

            Wood screws are mainly metric now which relates to their thickness. The head size can vary between brands.
            IIRC the old No6 screws were approx 3.5mm & No8 4mm
            If the countersink (csk) is 6mm, I’m guessing that the hole will be 4mm & as it’s a thin plate you will probably need 3.5mm csk screws to make sure the heads sit below the surface.

            If the ones you’ve ordered don’t fit (I suspect they might still be too large), let me know & I’ll send you some – although a box of 200, 3.5 x 15mm is only £1.41 from Toolstation or Screwfix. I would drill 2.5mm pilot holes.
            Try them in the plates without screwing them down otherwise the screw holes will be too big if you need smaller screws.

             

            --
            Regards
            wasbit

            Rig 1: Optiplex 3050 SFF
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            July 19, 2019 at 8:28 am #35008
            johnbarryjohnbarry
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              @johnbarry
              Forumite Points: 13

              Thanks Wasbit

              Maybe the 3.5mm will be better, cheers for the offer they don’t rob the bank so I have now ordered some 3.5mm.

              Cheers
              John

              July 19, 2019 at 10:29 pm #35022
              Bob WilliamsBob Williams
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                @bullstuff2
                Forumite Points: 0

                If I need anything like that JB, my first option is the local Screwfix. For anything I want to match up, I take one to Screwfix and they take the time to match up whatever it is.

                When the Thought Police arrive at your door, think -
                I'm out.

                July 22, 2019 at 8:29 am #35084
                johnbarryjohnbarry
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                  @johnbarry
                  Forumite Points: 13

                  Bob I went to screwfix, I hadn’t got one to match up. I said to the assistent I was after a countersink with a 3.5mm head and 15mm thread. She said we don’t sell in those sizes and didn’t know what I meant, it took me 20mins to get her to understand. The box of screws she sold me clearly states (on the box) 3.5mm x 16mm?

                  Cheers
                  John

                  July 22, 2019 at 1:54 pm #35091
                  BorisBoris
                  Participant
                    @boris
                    Forumite Points: 0

                    The old designation of these screws as 6 x 5/8″ (6 head/5/8″ length) can become 3.5 x 15mm 0r 3.5 x 16mm now according to whoever is selling/measuring them ?

                    Never trust an atom - they make up everything !

                    July 22, 2019 at 3:58 pm #35092
                    Wheels-Of-FireWheels-Of-Fire
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                      @grahamdearsley
                      Forumite Points: 4

                      https://www.diydoctor.org.uk/projects/screwsize.htm

                      I found the above guide to wood screw sizes. It may help someone ?

                      The size of machine screws and bolts using the M standard also specifies the thread pitch and spanner/screwdriver size. You can find a list in the Wiki for M screw sizes.

                      July 22, 2019 at 7:55 pm #35102
                      RichardRichard
                      Participant
                        @sawboman
                        Forumite Points: 16

                        Thank you, that could be very useful. The document is saved for later study. I currently really like the hex drive screws that you can get. They are so much more certain than the other styles of drive with a tendency for Posidrive to let me down,. This is possibly due to my increasingly feeble hand grip; arthritis and tendon pulley troubles really do not help.

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