Select Your Region
NLGI 2- Non-Flammable, Aerospace Grade PFPE Grease with PTFE thickener. Base Oil Viscosity (86 cSt @ 38°C). Meets MIL-PRF-27617 Type II.
Krytox™ 240AB is a white buttery grease formulated from clear, colorless, fluorinated synthetic oils that are nonreactive, nonflammable, safe in chemical and oxygen service, and are long-lasting. Krytox™ 240AB also meets MIL-PRF-27617 Type II and NATO G-398
Viscosity (cSt):
@20°C (68°F): 240
@ 38°C (100°F): 86
@ 99°C (210°F): 10.5
@ 204°C (400°F): 2.1
Vapor Pressure of Base Oil:
@ 38°C (100°F): 5 x 10 e -6
@ 260°C (500°F): 3 x 10 e -2
Volatility of Base Oil (wt% loss in 22 hr.):
@ 149°C (300°F): 1.9
@ 204°C (400°F): 17.3
@ 260°C (500°F): 76.2
Pour Point of Base Oil: -40°C (-40°F)
Texture: Buttery
NLGI Grade: 2
Mechanical Stability (ASTM D217 10,000 and 100,000 strokes): No change
Oxidation Stability @ 99°C (210° F): 0 psig pressure drop after 600 hr
Liquid Oxygen Impact (ASTM D2512, NASA MSFC 106B): Pass
Grease Density (at 25°C/77°F): 1.92 g/mL
Oil Separation (wt% loss in 30 hours):
@ 99°C (210°F): 4
@ 204°C (400°F): 12
Estimated Useful Range: -40°C to 232°C (-40°F to 450°F)
Qualification Reference Number: AFPET/PTP 08-012
MIL-Spec: MIL-PRF-27617 Tyler 2
NATO Number: G-398
Change in Worked Penetration: +3
Corrosion on Copper (2b max): 1b
High Temperature Bearing Performance (500 hr min at 10,000 rpm, 204°C): Stopped at 1,320 hr
Evaporation % (ASTM D-2595): 10.1
Solubility in Fuel (%): 0.3
Water Washout Characteristics (%): 0.25
Dirt Count:
75 micron and larger: 0
25-75 micron: 0
Resistance to Aqueous Solution:
Distilled Water: Pass
50/50 Distilled Water/Ethanol: Pass
Film Stability and Corrosion on Steel: Pass
Primary Chemistry: PFPE
Meets MIL-PRF-27617 Type II
Meets NATO G-398
Low to medium viscosity
Low out-gassing
Non-flammable
Non-Reactive
Broad temperature performance
NSF H-1 food grade
Flammable, Unsafe or Reactive Grease Solutions
Metal Component Wear & Tear (Bearings, Joints, etc.)
Krytox™ 240AB can be used in a wide range of aerospace and aviation applications including: Bearings, control switches, gauges, quick connectors, o-rings, gaskets, and seals.
Krytox™ Specialty Aerospace Performance Lubricants are PFPE based oils & greases that meet or exceed the strict requirements of the Aerospace, Aviation & National Defense industries.
Your document download will begin shortly.
ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
Thank you for your inquiry and interest in ChemPoint.
We will respond to you shortly.
ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
Thank you for your inquiry and interest in ChemPoint.
We will respond to you shortly.
ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
The document currently is provided in the following languages from the supplier at this time.
The document currently is provided in the following languages from the supplier at this time.
We’ve detected that you are located in a different region than the region selected on the website. Would you like to change your region?
Current Region: English - Canada
Hi, let us know if you have any questions as you visit our website.