If need open a machine mold, you must confirm the hole size according to your board, and then choose connector style, our connector have different sizes from 00 to 03, it can apply whole size board.
For example, if your board panel cut-outs OD is about 8-9mm, you should choose 0B size.
Application:
Medical
Defense Security
Instrumentation
Transportation
Industry
Energy
Broadcast
Audio/video
Insulating washer(color wheel):
Application: When your plug and socket need attached on the board, you can install a insulating washer to keep a potencial between different conductors.