MIL-PRF-27617G
This specification is approved for use by all Departments and Agencies of the Department of Defense.
1. SCOPE
1.1 Scope. This specification covers the requirements for greases resistant to hydrocarbon fuel
and liquid oxygen and for use as lubricants in aircraft, aerospace vehicles, and supporting equipment (see
6.1).
1.2 Classification. Greases will be of the following types and are identified by NATO code numbers
as follow (see 6.6):
Type
Operating Temperature Range
NATO NUMBER
I
-54°C to 149°C (-65°F to 300°F)
G-397
II
-40°C to 204°C (-40°F to 400°F)
G-398
III
-34°C to 204°C (-30°F to 400°F)
G-399
IV
-73°C to 204°C (-100°F to 400°F)
G-1350
V
-73°C to 232°C (-100°F to 450°F)
2. APPLICABLE DOCUMENTS
2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this
specification. This section does not include documents cited in other sections of this specification or
recommended for additional information or as examples. While every effort has been made to ensure the
completeness of this list, document users are cautioned that they must meet all specified requirements of
documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed.
2.2 Government documents
2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and
handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the
issues of these documents are those cited in the solicitation or contract.
FEDERAL SPECIFICATIONS
O-E-751
Ether, Petroleum, Technical-Grade
FEDERAL STANDARDS
FED-STD-791
Lubricants, Liquid Fuels, and Related Products; Testing Method of
DEPARTMENT OF DEFENSE SPECIFICATIONS
MIL-PRF-680
Degreasing Solvent
(Copies of these documents are available online at https://assist.daps.dla.mil/quicksearch/ or from the
Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.)
2
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