MIL-PRF-83261C
This specification is approved for use by all Departments and Agencies of the Department of Defense.
1. SCOPE
1.1 Scope. This specification covers grease intended to lubricate aircraft accessories which
operate at high speeds and under heavy loads in a temperature range of -73°C to +232°C.
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 Specification and standards. The following documents 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
FED-STD-791
Testing Method of Lubricants, Liquid Fuels, and Related Products
(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)
2.3 Non-government publications. The following documents 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.
ASTM, INTERNATIONAL
ASTM D217
Cone Penetration of Lubricating Grease (DoD Adopted)
ASTM D1264
Determining the Water Washout Characteristics of Lubricating
Greases (DoD Adopted)
ASTM D1478
Low-Temperature Torque of Ball Bearing Grease (DoD Adopted)
ASTM D1742
Oil Separation from Lubricating Grease During Storage (DoD
Adopted)
ASTM D2266
Wear Preventative Characteristics of Lubricating Grease (Four-Ball
Method) (DoD Adopted)
ASTM D2595
Evaporation Loss of Lubricating Greases Over Wide-Temperature
Range (DoD Adopted)
ASTM D2596
Measurement of Extreme-Pressure Properties of Lubricating Grease
(Four-Ball Method) (DoD Adopted)
ASTM D3336
Life of Lubricating Greases in Ball Bearings at Elevated
Temperatures (DoD Adopted)
ASTM D4057
Manual Sampling of Petroleum and Petroleum Products (DoD
Adopted)
(Copies of these documents are available online at https://www.astm.org or the ASTM International, 100
Barr Harbor Drive, West Conshohocken PA 19428-2959)
SOCIETY OF AUTOMOTIVE ENGINEERS (SAE)
SAE AMS 6447
Steel Bars, Forgings, and Tubing 1.4CR (0.98 1.10C) (SAE 52100)
Electroslag Remelted (DoD Adopted)
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