Connection Adapters are available with metric threads.
Press Release Summary:

Original Press Release:
ADAFALNGE(TM) and ADAFLANGEPORT(TM) Adapters
The ADAFLANGE(TM) ADAPTER with its face seal is generally supplied with the clamp type (thru-hole) flange. This combination adapts a flange port to a threaded connection using minimum space and joints. The ADAFLANGEPORT(TM) ADAPTER with its plain face is generally supplied with the threaded type companion flange. This combination adapts a threaded connection to a flange connection using a minimum of space and joints. Both adapters can be supplied with either clamp type or threaded type companion flanges giving the designer the greatest amount of flexibility as well as a great union. These adapters are available with 370 Flare, SAE Straight, ORS O-Ring Face Seal or NPTF Threads. British and Metric threads are also available.