MIL-PRF-81322G, PERFORMANCE SPECIFICATION: GREASE, AIRCRAFT, GENERAL PURPOSE, WIDE TEMPERATURE RANGE, NATO CODE G-395 (24 JAN 2005) [SUPERSEDING MIL-G-3545 AND MIL-G-81322E]., This specification covers one grade of general purpose, aircraft grease, NATO Code G-395, formulated to withstand operations at high speeds and a wide temperature range of -54 to 177 °C (-65 to 350 °F).