MIL-PRF-81329D (AMENDMENT 1), MILITARY SPECIFICATION: LUBRICANT, SOLID FILM, EXTREME ENVIRONMENT, NATO CODE NUMBERS S-137 (18 SEP 1998) [SUPERSEDING MIL-L-81329C]., This amendment forms a part of MIL-L-8132C, dated 8 August 1984 and is approved for use by all Departments and Agencies of the Department of Defense.