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MIL-PRF-23827 Grease, Aircraft And Instrument, Gear And Actuator ScrewThis specification covers the requirements for one grade of grease for use at extremely low temperatures on aircraft and instruments. This grease is effective in the temperature range from -73 degrees to 121 degrees C. The type I grease is identified by NATO code Number G-354 \(see 6.8\).

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MIL-PRF-23827C
TABLE II. Qualification inspection and methods.
Requirements
Test method or paragraph
1/ ASTM-D4048
Corrosiveness (copper strip)
Dirt
FED-STD-791, Method 3005
ASTM-D2265
Dropping point
ASTM-D2595
Evaporation
FED-STD-791, Method335
Gear wear
ASTM-D3336
High temperature performance
Load carrying capacity
ASTM-D2596
Low temperature torque 2/
ASTM-D1478
Odor
4.5.1
Oil separation
ASTM-D6184
Oxidation stability
ASTM-D942
Penetration
ASTM-D217
Rust preventative properties
ASTM-D1743
Storage stability 3/
FED-STD-791, Method 3467
Water resistance
ASTM-D1264
Worked stability
FED-STD-791, Method 313
Visual
Workmanship
1/
The copper strip shall not tarnish more than a classification of 1b when compared with
ASTM copper strip corrosion standards. Test shall be conducted at 100° ±1°C for 24-hours.
2/
Test shall be conducted at -73° ±1°C. Observation for skidding or ball sliding shall be made
during test run.
3/
Temperature of 40° ±2°C to be maintained for 6 months.
6



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