Steel Metric Flareless Fitting, 16.00 mm S Series Profile Ring

The fitting can withstand temperatures up to 120 degrees Celsius. You'll want to stay below that to keep everything working right.

Rated up to 630 bar at the top end, though the actual working pressure varies depending on the application and where it falls in the S Series pressure tables. There is a 4:1 safety factor built into that rating, so you have a solid margin above the working load before you're anywhere near a failure threshold. The lower end of the pressure range starts at 160 bar, so it covers a pretty wide spread of operating conditions.