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Thread: Carlon Blue and Super Blue boxes?

  1. #1
    DIY Junior Member Karl in NY's Avatar
    Join Date
    Jan 2011
    Northern NY

    Default Carlon Blue and Super Blue boxes?

    The round ceiling fixture boxes supposedly take regular 8-32 machine screws to mount fixture crossbars...

    I can't get them to take them, even when running starter threads with an 8-32 tap. I have been to their website, and they say use the 8-32 screws that come with the fixtures to secure the crossbars to the boxes.

    I must be doing something wrong, as I don't think NEC/UL permits self-tap screws (like sheetrock screws), but only screws with machine threads....

    What am I doing wrong?

    I have seen plenty of houses using self-tap screws into the blue boxes, apparently for the same reason.
    Last edited by Karl in NY; 10-09-2013 at 03:20 PM.

  2. #2
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona


    IF you 'run the threads" with an 8-32 tap, AND you have 8-32 machine screws, there should be absolutely no reason they should not tighten up.
    Licensed residential and commercial plumber

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