[captainclock1988]

4-40 is a common size.

Well I saw that they had some 4-40 Screws at the hardware store but I wasn't sure if that's what I needed or not, because their screw checker device at the hardware store only went down to 6-32 so I had no way of checking the original screw I had left from the radio to see if it was indeed a 4-40 screw or whatever. I do know that when I stuck the original screw into the 6-32 screw checker it was just slightly smaller as it did seem to attempt to thread into the screw checker but not quite. There was also a 5-40 screw listed on McMaster-Carr but not sure how common that is compared to a 4-40.