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Thread: I Have a CD Rack With a Strange Metric Thread

  1. #1
    Associate Engineer
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    Sep 2021
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    I Have a CD Rack With a Strange Metric Thread

    I have a clever CD rack made of female threaded tubing. Two lengths of tubing are joined by a short length of all-thread whose ends have grooves for a slotted screwdriver. A foot is placed on each leg using a similar arrangement. I'd like to convert it into two shorter racks and make a new set of feet, better suited to our baseboard. The all-thread clearly matches a 1.5 mm pitch, so the thread is metric. When I measure the OD of the threads it measures 0.424 inches or 10.78 mm, which makes no sense to me.
    Would a designer go to the bother of creating a product that requires non-standard threaded parts?
    thanks,
    baumgrenze

  2. #2
    Administrator Kelly Bramble's Avatar
    Join Date
    Feb 2011
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    Bold Springs, GA
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    Threads are never manufactured perfect, and size variations are allowed within the thread standard.

    Most likely that is a M11 x 1.5 6g class thread.

    See:

    https://www.engineersedge.com/hardwa...ead-sizes1.htm
    Tell me and I forget. Teach me and I remember. Involve me and I learn.

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