Bob Villa wrote:
Channel nuts (not fishing or TV surfing related)

http://www.jdr-websites.co.uk/galler.../image/12a.jpg

Thanks,
bob
(I do not live in the UK)


Probably. Fastenal is one U.S. source. Electricians in my area
use them when mounting panels. Some on Ebay. Some trade names are
Unistrut, Superstrut, and Powerstrut.