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Krytox™ 240AC – Aircraft and Aerospace Grease

Krytox™ 240AC is a MIL PRF-27617 TYPE III  and NSF H-1 certified grease. It also meets many ASTM specifications.

It has a viscosity of 800 at 20°C and 270 cSt at 38°C, making it ideal in situations where a high viscosity grease is required. The ideal temperature of this fat is from -34 to 288 ° C.

Krytox™ 240AC – Aircraft and Aerospace Grease

Krytox™ 240AC is an NSF H-1 food-grade lubricating grease classified for incidental food contact.

Krytox™ 240AC Grease is based on perfluoropolyether (PFPE) oils. These synthetic fluorinated lubricants are used under extreme conditions, such as continuous high temperatures up to 300°C (572°F) and higher temperatures for shorter periods, depending on product grade limits. Chemically inert and safe to use around hazardous chemicals, these lubricants are non-flammable and safe for use in oxygen service.

In the aerospace industry, Krytox™ 240AC grease is applied in a variety of configurations, from bearings and seals to O-rings and oxygen systems. Krytox™ is a valuable asset to the aerospace industry due to its superior performance over a wide temperature range from -100 to 750ºF (70 to 399ºC). Furthermore, it is robust in harsh environments and has excellent friction properties, allowing it to resist changes in properties over time, and provides higher wear and lower energy consumption.

Composition of Krytox™  240AC

  • Carbon, oxygen and fluorine
  • Polytetrafluoroethylene Additive

Krytox™ 240AC Features

  • Low coefficient of friction
  • Good water resistance
  • Superior performance with advanced high-temperature stability characteristics
  • Non-flammability
  • Chemical and biological inert
  • High load capacity
  • Listed with NSF as category H1 for “accidental contact with food”


It can be used in:

  • Gaskets for coupling the oxygen system, valves, regulators, etc.
  • Liquid fuel rocket motors and ground support systems
  • Instruments, gyroscopes and gimbal
  • Seals, valves and pneumatic systems
  • Bearings
  • Threaded guides and ball screws
  • Electromechanical actuators
  • Couplings for splined shafts for auxiliary motors
  • Non-conductive lubricant for sealing electrical connectors
  • IR and optical sensors


  • THOUSAND PRF-27617
  • NSF H-1 Rated
  • ASTM D445
  • ASTM D2595
  • ASTM D97
  • ASTM D217
  • ASTM D942
  • ASTM D2512
  • ASTM D6184

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