Military Lubricant Fluids

MIL-PRF-87252E

RADCOLUBE®500M

COOLANT FLUID, DIELECTRIC, HYDROLYTACALLY STABLE

Radcolube® 500M Coolant Fluid is a military-qualified dielectric/cooling fluid consisting of a synthetic hydrocarbon base oil and additives. Designed for safe use in land and airborne closed loop cooling systems, RADCOLUBE® 500M demonstrates excellent heat transfer fluid properties, oxidative stability and dielectric characteristics in both military and commercial applications from -54°C (-65°F) to 135°C (275°F).

Qualification Numbers

AFPET/PTPT 19-014

Qualification Date

25 September 2019

NATO Code

S-1748

ISO 9001: 2015 Certification Number

C2018-00035

National Stock Numbers Available From Radco

* 5 Gallon Pails Available at Request

9150-01-306-2475             Quart

9150-01-336-7174             Gallon-Oblong

9150-01-304-0885             Gallon-Round

9160-01-380-2175             Gallon-Oblong (Insulating Oil, Electrical)

9150-01-306-2470             55 Gallon Drum

CHARACTERISTICS REQUIREMENT TYPICAL RESULTS TEST METHOD
Kinematic Viscosity, mm2/s (cSt)
100°C 1.65 min 1.68 ASTM D445
40°C 5.0 min 5.0 ASTM D445
-40°C 300 max 261 ASTM D445
-54°C ASTM D2532
1.5 hours, initial 1300 max 1,078
3.0 hours 1300 max 1,100
Dielectric strength, kV 35 min 40 ASTM D877
Resistivity at 25°C, ohm-cm 1.0 x 1010 min 2.1 x 1013 ASTM D1169
Flash point, °C 150 min 172 ASTM D92
Fire point, °C 160 min 178 ASTM D92
Acid number, mg KOH/g 0.20 max 0.01 ASTM D664
Water, mg/kg (ppm) 50 max 26 ASTM D6304
Rubber swell, SAE AMS 3217/2 (NBR-L), percent change in volume 0.0 - 10% 7.4% ASTM D4289
Solid particle contamination Paragraph 4.4.1
Particle count per size range NAS 1638 FTM 3012
5 to 15 8000 max 417
16 to 25 1425 max 27
26 to 50 253 max 30
51 to 100 45 max 0
> 100 8 max 0
AS4059 Contamination Class 5 max 2
Storage stability PASS PASS FTM 3465
High-temperature stability PASS PASS Paragraph 4.4.3
Corrosiveness and oxidation stability ASTM D4636
Change in acid number, mg KOH/g 0.5 max 0.00
Metal specimen weight change, mg/cm2
Aluminum ± 0.2 -0.01
Cadmium plated steel ± 0.2 0.00
Copper (copper color) ± 0.4 (3a max.) 0.01 (3a)
1010 Steel ± 0.2 0.01
Magnesium ± 0.2 0.00
Percent change in viscosity at 40°C 5% max 1.2%
Separation of insoluble materials or gumming of the fluid None None
Compatibility PASS PASS Paragraph 4.4.2

© 2020 Radco Industries, Inc. All Rights Reserved. Webfoot

Stay Connected