Electrical Box screw sizes

jamiedolan · 12-15-2008, 03:58 PM

I need additional screws for several electrical boxes, some mounting a fixture, some for switches, some for covers. I just want to buy some boxes of machine screws to cover the various sizes of commonly used screws in electrical boxes and fixtures.

I think the threads on the most common screws are 6/32, 8/32 and 10/32. Can anyone confirm that these are the correct sizes for the common electrical screws?

Thanks
Jamie

nap · 12-15-2008, 04:27 PM

the screw that holds the device on is a 6-32, usually about 1 inch.

on steel boxes, the screw that holds the cover or plaster ring on is an 8-32, fairly short.

ground screws are usually 10-32

trim plate screws are 6-32 but they are painted to match the plates.

jamiedolan · 12-15-2008, 04:33 PM

Quote:

Originally Posted by nap

the screw that holds the device on is a 6-32, usually about 1 inch.

on steel boxes, the screw that holds the cover or plaster ring on is an 8-32, fairly short.

ground screws are usually 10-32

trim plate screws are 6-32 but they are painted to match the plates.

Thanks! I have to put a box extension on, and have some fixtures to mount that didn't come with screws.

Thanks again for the info, I'll be able to wrap up a couple more projects. :-)
Jamie