PROPERTIES

MIL-G-21164D

TYPICAL

Oil type

–

Synthetic hydrocarbon/Ester

Thickener  type

–

Lithium Complex

Base oil viscosity mm²/s

–

1840

@ –40°C

–

14.2

@ 40°C

–

3.4

@ 100°C

Useful operating  temperature range

 °C

–

–73 to +121

Drop point

°C

165 min

234

Worked penetration @ 25°C

260 to 310

281

Unworked penetration @ 25°C

200 min

288

Worked stability (100,000strokes)

260 – 375

309

Bomb oxidation pressure drop

100 hrs

kPa (psi)

68.9 (10) max

10.3

500 hrs

kPa (psi)

103.4 (15) max

34.5

Oil separation @ 100°C in 30 hrs

      % m

5 max

2.29

Water resistance test loss @ 40°C

       % m

20 max

3.39

Evaporation loss in 22 hrs @ 100°C

% m

2.0 max

0.65

Low Temperature Torque @ -73°C

Starting torque

Nm

0.98 max

0.50

1 hr  running torque

 Nm

0.098 max

0.060

Anti-friction bearing  performance @ 121°C

  hrs

1000 min

Greater than 1000 (on all four

runs)

Extreme  pressure properties  – load wear index

50 min

57.49

Copper corrosion 24 hr @  100°C

1b max

1b

Rust Prevention/Bearing  protection

Must pass

Passes, no corrosion

2 days @ 52°C

Storage Stability   6 months @ 40°C

Unworked penetration

200 min

226

Worked  penetration

289

Change in penetration from original

30 max

8

Colour

–

Dark grey

U.S.

Approved  MIL-G-21164D

British

Approved DEF STAN 91-57

French

Equivalent DCSEA 353/A

Russian

–

NATO Code

G-353

Joint  Service  Designation

XG-276