Castrol Braycote 640ACMS 2 oz Syringes

Castrol Braycote 640ACMS 2 oz Syringes
Castrol Braycote 640ACMS 2 oz Syringes
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Castrol Braycote 640ACMS 2 oz Syringes:

Castrol Braycote 640ACMS is a perfluoroether based NLGI Grade 3-1/2 lubricating grease thickened with a tetrafluoroethylene telomer and containing approximately forty percent molybdenum disulfide. Castrol Fluoroclean™ X100 can be used to remove this lubricant. Refer to the data sheet for Fluoroclean X100 for information regarding this product.


Braycote 640ACMS is designed for use as a LOX compatible heavy duty grease for high load bearings and sliding surface applications. It can also be utilized as an anti-seize and sealing compound for thread applications. Braycote 640ACMS is suitable for use with fuels and oxidizers such as oxygen. Perfluorinated greases, in general, exhibit excellent shelf lives due to their intrinsic inertness.



Spec Appearance Smooth, grey
  NLGI Grade 3.5
D 1403 Penetration, 25°C (77°F), mm-1
Worked, 60 strokes

Spec Molybdenum Disulfide Content, % wt 43
D 2512 LOX Impact Sensitivity Pass
D 2595 Evaporation Loss, % wt
22 hrs @ 204°C (400°F)

Base Oil Characteristics:
D 287 Density @ 24°C (75?F), g/mL 1.910
D 445 Kinematic Viscosity, cSt
@ 99°C (210°F)
@ 38°C (100°F)
@ 0°C (32°F)
D 2270 Viscosity Index 134
D 97 Pour Point, °C (°F) -36 (-30)
D 972 Evaporation Loss, % wt
22 hrs @ 204°C (400°F)
Knudsen Vapor Pressure, torr
@ 38°C (100°F)
@ 100°C (212°F)
8 x 10-8
< 9 x 10-4

Temperature Range:

-36°C to 204°C (-30°F to 400°F) under normal operating conditions and up to 260°C (500°F) for short durations. Lower temperature capability is possible where adequate torque is available.


Braycote 640ACMS is compatible with all commonly used metals, plastics and elastomers. It may be adversely affected by Lewis Acids such as aluminum chloride, at elevated temperatures. Rubbing surfaces of aluminum, magnesium, or titanium alloys under certain conditions may react with this product. Such systems should be thoroughly evaluated. Surfaces must be well cleaned of organic rust inhibitors prior to grease application to insure proper lubrication. This product is not recommended for use in applications under high vacuum with loads exceeding 100,000 psi for extended periods of time.


Braycote 640ACMS is available in 2 ounce (AVDP) syringes and 1 pound jars.