Simple radio install question

A big SHOUT OUT to member Pishta! He sent a fellow in need a pair of the radio nuts and they fit perfectly. Thank you Pishta!!

Now to possibly help other members, Pishta suggested these might be 1/2-28 thread. So I searched and went online and found some "panel nuts" - 1/2-28 UNEF - and ordered some. They arrived a few days later and also fit. So now we know....1/2-28 UNEF is what they are for the radio. For reference, here's what I ordered:

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