MILITARY PERFORMANCE FLUIDS
HEAT TRANSFER FLUIDS

630 . 232 . 7966

MILITARY FLUIDS

MIL-PRF-87257 B (Formerly MIL-PRF-87257 A)
RADCOLUBE® FR257

RADCOLUBE® FR257 is a military-qualified synthetic, fire-resistant hydraulic fluid consisting of synthetic hydrocarbon base oils and additives. Designed for safe use in low temperature aircraft and missile hydraulic systems, RADCOLUBE® FR257 demonstrates excellent low temperature properties, oxidative stability and fire protection in both military and industrial/commercial applications.
Qualification Number: AFPET/PTPT  14-006
Qualification Date: 2-MAY-2014
NATO CODE: H-538
ISO 9001:2008  Certification Number: C2015-00068

National Stock Numbers Available From Radco

9150-01-388-7769             Quart

9150-01-386-6687             Gallon

9150-01-391-2087             5 Gallon Pail

9150-01-387-4577             55 Gallon Drum

CHARACTERISTICS
REQUIREMENT
TYPICAL RESULTS
TEST METHOD
Kinematic Viscosity,
centistokes
@ 40 °C, minimum 6.7 cSt 6.8 cSt ASTM D445
@ 100 °C, minimum 2.0 cSt 2.1 cSt ASTM D445
@ -40 °C, maximum 550 cSt 456 cSt ASTM D445
@ -54 °C, maximum 2,500 cSt 2291 cSt ASTM D445
Evaporation loss (%wt), maximum 20.0 17.0 FED STD 791-350.2
Pour Point, °C, maximum -60°C < -81°C ASTM D5949
Flash Point, °C, minimum 160°C 170°C ASTM D92
Fire Point, °C, minimum 170°C 192°C ASTM D92
Total Acid Number, maximum 0.20 mg KOH/g 0.10 mg KOH/g ASTM D664
Water Content, ppm maximum 100 ppm 11 ppm ASTM D6304
Solid Particle Contamination per 100 ml,  microns
5 to 15 10,000 max 4,034 FED STD 791D 3012
16 to 25 1,000 max 436 FED STD 791D 3012
26 to 50 150 max 108 FED STD 791D 3012
51 – 100 20 max 10 FED STD 791D 3012
> 100 5 max 0 FED STD 791D 3012

Manufacturing Location: LaFox IL 60147

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RADCOLUBE® is a registered trademark of RADCO INDUSTRIES, INC.