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 5305 - Bronze Corrosion, Copper Corrosion, Silver Corrosion
To read or download this specification, click below.
This specification supersedes military specification MIL-L-7808.