Simple radio install question

I got some of those at a True Value hardware but nope, they would start but then clearly had a wrong thread count. So Pishta bailed me out!
Now, we've been missing your posts and storytelling. But not to worry, my trusty 3/8 socket has somehow also run off with the radio nuts so that's how I got in this pickle!! If I see your missing 10mm wrench, I'll let you know!