Finding Unified rivnuts

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Finding Unified rivnuts

Home Forums Help and Assistance! (Offered or Wanted) Finding Unified rivnuts

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  • #800453
    old mart
    Participant
      @oldmart

      Metric rivnuts are easy to get hold of in the UK, but I have been asked about unified ones in the sizes under 1/4″. There are plenty on ebay from the USA with the added large postal charges. I am making an 8-32 UNC adaptor for the tool used for metric ones.

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      #800458
      Michael Gilligan
      Participant
        @michaelgilligan61133
        #800462
        Robert Atkinson 2
        Participant
          @robertatkinson2
          #800487
          peak4
          Participant
            @peak4
            #800551
            Howard Lewis
            Participant
              @howardlewis46836

              If the worst comes to the worst, you could make them!

              (I had to when given an otherwise nice roller cabinet, with damaged M6 fixings for the handle)

              Howard

               

              #800553
              peak4
              Participant
                @peak4

                No idea why the Amazon link now displays as above; it was OK when I posted it.

                Box of mixed imperial “Rivnuts” HERE, but only 3 left apparently

                Bill

                #800574
                old mart
                Participant
                  @oldmart

                  When Howard mentioned making them, it caused me to compare thread sizes, and tomorrow I will look at the 3mm ones. That thread is 0.1181″ and 8-32 is 0.164″. 4mm would probably be too large to retap. I very much doubt if 3.5mm rivnuts exist. Roger is going to try the local suppliers, but there is not so much demand for unified nowerdays.

                  I think he wanted at least 200

                  #800580
                  Michael Gilligan
                  Participant
                    @michaelgilligan61133
                    On old mart Said:

                    I think he wanted at least 200

                    Well, the ones that I linked were £9.99 for 100

                    [ but they’re probably the wrong colour ]

                    MichaelG.

                    #800585
                    old mart
                    Participant
                      @oldmart

                      I did consider those blind ones, but would have to confer with Roger regarding the length, 11/16″ is very long for such small rivets.

                      #800884
                      old mart
                      Participant
                        @oldmart

                        The 3mm are too small to tap out to 8-32, and the 4mm are too large. The 4mm aluminium ones strip the threads 4 times out of five.

                        #801484
                        old mart
                        Participant
                          @oldmart

                          Last Thursday, Roger ordered some 8-32 aluminium rivnuts from China and yesterday (Wednesday), he brought them in. That was pretty quick delivery. I made a tool for the rivnuts out of some hex steel bar, but it showed some distress while testing the 8-32 thread. I made another out of a 1/2″ aircraft bolt, that should be a lot stronger.

                          #803750
                          Nigel Graham 2
                          Participant
                            @nigelgraham2

                            Looking at Normandy Fasteners’ web-site I see they offer what I had always known as “hank bushes” – the hexagonal bushes fitted from the rear of the panel by expanding the shank, itself countersunk like a union nut, into a countersink on the outer face.

                            Once installed, and especially after painting, they are indistinguishable from plain nuts and I can think of many uses in model-engineering, so I am surprised our suppliers seem never to have heard of them.

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