08-06-2013, 07:11 PM
Of course , i'm not an expert on these Radios...But considering how old it is and the fact that the US didn't take up metric until much later, the 1/4" screw would be my guess. Also, didn't Ron say the #14 would be a little tight at first? That tells me that the US size type would probably be correct as the US and Metrics sizes are inbetween each other.