Adapter for 300Bar Oxygen tanks, whose valve is specific of the Nevoc W 30x2 type
This adapter has the W30x2 and G1 / 4 male connection to connect to different adapters.
As a general rule, it´s needed this other part (the below link) to completely convert to a standard DIN connection.
Link to Adapter G1 / 4 female to DIN 300 Bar