MIL-DTL-25681E
Table I. Composition of MIL-DTL-25681
Material
Percent by weight
Molybdenum disulfide
50 ± 1%
Silicone oil
50 ± 1%
3.3 Chemical characteristics. The chemical characteristics of each component shall be as
follows:
3.3.1 Molybdenum disulfide. The molybdenum disulfide shall conform to AMS-M-7866.
3.3.2 Silicone oil. The silicone oil shall be methyl phenyl polysiloxane. A corrosion inhibitor shall
be permitted.
3.4 Physical characteristics . The physical characteristics of each component shall be as follows:
3.4.1 Molybdenum disulfide. The molybdenum disulfide shall conform to AMS-M-7866.
3.4.2 Silicone oil. The silicone oil shall conform to the characteristics listed in Table II.
Table II. Physical characteristics of silicone oil component
Characteristics
Limits
Test Method
Color (ASTM Color)
2.0 (maximum)
ASTM D1500
Flash point
274ºC (minimum)
ASTM D 92
2
Viscosity at 100ºC
16 22 mm /s
ASTM D445
2
Viscosity at 40º
65 to 85 mm /s
ASTM D445
3.5 Homogeneity. The two components shall be thoroughly and uniformly blended together to
form a homogeneous mixture at the time of packaging. (The molybdenum disulfide tends to settle to the
bottom of the container.)
3.6. Workmanship. When examined visually, the finished lubricant shall contain no adulterations
and, after blending, shall be uniform in appearance.
4. VERIFICATION
4.1 Classification of inspection. The inspection requirement specified herein is classified as
conformance inspection (see 4.2).
4.2 Conformance inspection. Conformance inspection shall include the lotting of 4.3 and
sampling of 4.4.
4.3 Lot.
4.3.1 Bulk lot. A bulk lot is an indefinite quantity of homogeneous mixture of lubricant offered for
acceptance in a single isolated container or manufactured in a single plan run (not exceeding 24 hours)
through the same processing equipment with no change in the ingredient materials.
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