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The Stratoflex Products Division designs and manufactures lightweight Dynatube® fittings, designed for the high temperature, high pressure, no-leak requirements of aircraft and aerospace fluid and pneumatic systems.


The Dynatube fitting is a metal-to-metal fitting providing significant savings on weight and envelope over all other types of aerospace fittings. The fitting is a dual seal fitting that provides a self-locking feature.


The original “beam seal” fitting designed and patented in 1963, the Dynatube fitting has benefited from literally thousands of tests and evolutionary refinements. 



  • Aerospace hydraulic systems
  • Military ground vehicles hydraulic systems
  • Aerospace pneumatic systems
  • Aerospace fuel systems
  • Military aircraft fuel systems
  • Commercial aircraft fuel systems
  • Jet engine fuel and lube systems
  • Nuclear reactors
  • In-flight refueling systems
  • Missiles

Technical Highlights

  • Pressure rated from 3,000 psi (206 bar) to 8,000 psi (551 bar) depending on size, material and configuration
  • Sealing efficiency increases with higher pressures
  • Temperature: Ranges from -320 to +1,300°F (-195 to +704°C) depending on fitting material
  • Material: titanium (6AL-4V), stainless steel (17-4PH and 15-5PH), and nickel-based alloy (718)
  • Fire safety: withstands FAA zero flow 2000° F fire test
  • Configurations: straights, elbows, tees, crosses, reducers, expanders, tube end fittings, and hose end fittings.


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