7000 Series Ermeto Steel Flareless Fitting, 0.25 Inch Tube OD To 1/8-27 Male NPT, Straight

Constructed from carbon steel with a Weathercote finish, this fitting provides considerable resistance to nonflammable hydraulic fluids.

Pressure rating on this one depends on the tube size you're running with it, but the range goes from 1000 psi up to 4000 psi. For a quarter-inch tube OD setup connecting to a 1/8-27 male NPT port, that's a solid range for most instrumentation and chemical processing work. It's also rated to handle temperatures from negative 65 up to 400 degrees F under full operating pressure, and it's been used in applications reaching 800 degrees F at reduced pressure. Not a light-duty piece at all.