DB9-G1-00 Male 9 Pin Port Riveting Connector PCB Block Converter Breakout Terminal Pack of 2 material:cooper,metal and plastic riveting teeth connector type,male plug terminal terminal spacing is 5mm,screw hole diameter is 2.5mm,use a width of 2.5mm screwdriver to assemble Put 3mm thickness insulated pad at the bottom The terminals can accept 24-12AWG wire and max 10A current