This EH series is interchangeable with PARKER 1141 SERIES and SNAP-TITE H SERIES. Stainless Steel Product. This series is mainly used in offshore equipment and hydraulic lines in a corrosive environment. Rated pressure up to 10,000 PSI. Small diameter mating seal keeps separate forces to a minimum, allowing easier threaded connection and disconnection at pressures up to 5000 PSI. Self-locking threads guard against accidental disconnection. Visual connection indicator- when fully coupled, the sleeve edge is flush with the end of the male thread.