this is a data plug for the Russian azart r-187-r1 with all pinholes open it is designed for 1mm pogo pins to be soldered to 30awg audio grade wire. the screw is a M6 screw with 13mm thread length. I have used this to program my personal azart. use at your own risk, as poor soldering, improper pinouts, and false schematics can ruin your radio. only use schematic provided by crypto museum.