MIL-DTL-53131A
4.6 Tolerances. The lubricating oil supplied under contract shall be identical, within permissible
tolerances assigned by the qualifying activity, for the properties listed in 3.4, to the product receiving
qualification. The values resulting after the application of the tolerances shall not exceed the maximum
nor fall below the minimum limits specified herein (see table I through IV and 3.5.1 through 3.7).
5. PACKAGING
5.1 Packaging. For acquisition purpose, the packaging requirements shall be as specified in the
contract or order (see 3.2 and 3.10). When actual packaging of material is to be performed by DoD
personnel, these personnel need to contact the responsible packaging activity to ascertain requisite
packaging requirements. Packaging requirements are maintained by the Inventory Control Point's
packaging activity within the Military Department or Defense Agency, or within the Military
Department's System Command. Packaging data retrieval is available from the managing Military
Department's or Defense Agency's automated packaging files, CD-ROM products, or by contacting the
responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not
mandatory.)
6.1 Intended use. The lubricants covered by this specification are military unique. The lubricated oils
are intended for use in the precision bearings of inertial guidance gyros, accelerometers and other suitable
instrument bearing applications. To allow the user the option of using a specified oil with the optimum
viscosity and operation temperatures for the application, the lubricants in this specification are classified
into five different grades of oils according to their viscosity properties. Prior to using these oils, their
performance should be verified in each application. Recommended ambient temperature ranges for the
five grades of oil are shown in table VI. The lubricants covered by this specification were formulated for
use in critical military applications, such as aircraft, systems, and various weapon systems. Because of its
specific applications and harsh temperature range, there are no other commercial specifications available
to cover these military applications.
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