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Wall Box Thread Cleaner

Discussion in 'Tools and Materials' started by alan8376, 27 Jul 2009.

  1. alan8376

    alan8376

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    Location:
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    Unfortunately, some cement has got trapped behind the switch securing screws which make fitting new screws impossible.

    Is there a thread tap (3.5mm) availabe that can be used to clean up the the threaded ears inside a light switch or 13Amp socket wall box.
     
  2. xerxes

    xerxes

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    Yes, they're quite widely available. For example here.

    Scrape off as much of the cement as you can from the lug first before using the rethreader.
     
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  4. alan8376

    alan8376

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    Thanks for the tip on using Re Threaders. Not sure whether the threads are 3.5 or 4.0mm ?

    The wall boxes for lights and 13 Amp plug are about 18 yrs old. Which thread are they lible to be?

    Thanks
     
  5. RF Lighting

    RF Lighting

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    Unless they are really old, the threads will be M3.5

    If the boxes are imperial, they will be threaded to 4BA, but these can be rethreaded to M3.5 to take the new screws supplied with accesories.
     
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