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MIL-PRF-7808 Test Specimens

  • Aug 31, 2021
  • 1 min read

Updated: Nov 8, 2022

Metaspec manufactures test specimens required by military specification MIL-PRF-7808, which covers the requirements for two grades of aircraft turbine engine lubricating oil, identified as Grade 3 (NATO Symbol 0-148) and Grade 4 (NATO Symbol 0-163).


The lubricating oil is intended for use in specific models of aircraft turbine engines, helicopter transmissions, accessory and auxiliary power units, and other types of equipment that require a synthetic base oil. Grade 3 is intended for normal use unless otherwise specified. Grade 4 is intended for applications which require higher viscosity and greater thermal stability.


The following is a list of tests in Specification MIL-PRF-7808L that require test specimens. Some of these tests may be customized for this specification. Click on the test method number for more information about specimens required for each test.



  • FTM 5321 lead and copper catalyst specimens for MIL-PRF-7808 testing
    FTM 5321
  • FTM 5305 copper silver and bronze test strips for MIL-PRF-7808 testing
    FTM 5305
  • FTM 3411 steel test specimens for MIL-PRF-7808 testing
    FTM 3411
  • ASTM D4636 metal specimens for MIL-PRF-7808 testing
    ASTM D4636

To read or download this specification, click below.



This specification supersedes military specification MIL-L-7808.


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