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.
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