MIL-PRF-83282 as a Fire-Resistant Aircraft Hydraulic Fluid

MIL-PRF-83282 is the U.S. military performance specification for fire-resistant, synthetic hydrocarbon hydraulic fluid for aircraft and missile systems. The fluid is a red-dyed oil with a synthetic hydrocarbon (polymerised alpha-olefin) base. NATO code H-537 and joint service designation OX-19 are printed on the data sheets below. The current version found is MIL-PRF-83282D (30 September 1997, with Amendment 1 of 10 December 1997). It supersedes MIL-H-83282C, the designation under which the fluid is also widely known. It is written for use from −40 °C to +205 °C.

Why it exists: fire resistance. A leaking petroleum fluid can ignite on a hot surface. MIL-PRF-83282D requires a flash point of at least 205 °C, a fire point of at least 245 °C and an autoignition temperature of at least 345 °C. MIL-PRF-5606H sets a flash point minimum of only 82 °C. In the NADC report the MIL-H-83282 sample flashed at 224 °C against 99 °C for MIL-H-83282, and its flame spread more slowly (0.33 against 0.76 cm/s). The gain is real but not total. The same report says the U.S. Air Force rejected MIL-H-83282 in 1976 as only a marginal fire-resistance improvement over MIL-H-83282. In the hot-manifold drip test 5606 ignited at a higher temperature (560 °C against 327 °C) because it evaporates before it reaches the hot surface.

The trade-off: thicker when cold. The −40 °C viscosity limit is 2200 mm²/s, against 600 mm²/s for 5606, and MIL-PRF-83282D has no −54 °C limit. MIL-PRF-87257 is the low-temperature fire-resistant companion specification (it is named in MIL-PRF-83282D; it was not opened for this site, so no 87257 values are given here). MIL-PRF-83282D requires the fluid to mix with MIL-H-83282 and MIL-H-87257 fluids from −40 °C to 135 °C without gums, sludge or insoluble material.

The measured properties on this page are the MIL-H-83282 columns of NADC-79248-60 (Conte & Hammond, Naval Air Development Center, 1980, DTIC ADA081597). That is the 1980 NADC reference lot of MIL-H-83282 (lot and revision not stated). It predates MIL-PRF-83282D by 17 years and gives no measurement uncertainty. It is more viscous at 38 °C than current MIL-PRF-83282D products. Manufacturer values are single-lot typicals and are labelled as such. The report has MIL-H-83282 columns in the same tables, so the 5606 values are shown beside the 83282 values for a like-for-like comparison.

MIL-PRF-83282 Property Calculators

Explore the full set of MIL-PRF-83282 property calculators on KasperCalc. For the petroleum fluid it replaces, see MIL-PRF-5606 General Properties.

Density Specific Heat Capacity Thermal Conductivity Dynamic and Kinematic Viscosity Prandtl Number Thermal Expansion Coefficient Thermal Diffusivity
MIL-PRF-83282 All-Properties Calculator
Degrees (°F):
Degrees (°C):
Density
Density (kg/m³):  
Density (lb/gal):  
Density (lb/ft³):  
Specific Gravity:*  
Viscosity
Kinematic Viscosity (mm²/s):  
Kinematic Viscosity (SSU):  
Dynamic Viscosity (mPa·s):  
Dynamic Viscosity (lb/(ft·s)):  
Thermal Properties
Specific Heat (kJ/kg·K):  
Specific Heat (BTU/(lb·°F)):  
Thermal Conductivity (W/m·K):  
Thermal Conductivity (BTU/(hr·ft·°F)):  
Thermal Conductivity (BTU·in/(hr·ft²·°F)):  
Thermal Diffusivity (×10⁻⁸ m²/s):  
Prandtl Number:  
Thermal Expansion
β × 10⁻⁴ (1/K):  

*Specific gravity is referenced to a static water density of 998 kg/m³ (water at 60 °F) rather than to water at the fluid's own temperature.

Combines the Density, Viscosity, Specific Heat, Thermal Conductivity, Thermal Diffusivity, Prandtl Number, and Thermal Expansion calculators into one temperature lookup, atmospheric pressure. All values come from fits to NADC-79248-60 (MIL-H-83282, the 1980 NADC reference lot): density 38–204 °C, specific heat and thermal conductivity −18 to 204 °C, kinematic viscosity −54 to 204 °C (the −40 to 38 °C span is interpolation only). Dynamic viscosity, diffusivity, Prandtl number and expansion are derived from density and are limited to 38–204 °C.

Specifications
DesignationStatus / Source
MIL-PRF-83282DPerformance Specification: Hydraulic Fluid, Fire Resistant, Synthetic Hydrocarbon Base, Metric, NATO Code Number H-537. Dated 30 September 1997; supersedes MIL-H-83282C of 25 March 1986 (EverySpec copy, read in full)
MIL-PRF-83282D Amendment 110 December 1997. Deletes the wick flammability and the high temperature-high pressure spray ignition rows from Tables II and V, sets the high temperature stability test to 205 °C for 100 h and replaces the solid particle contamination rows. It changes no viscosity, flash point, fire point, autoignition, pour point or bulk modulus limit (read in full, 2 pages). A Notice 1 also exists and was not opened
MIL-H-83282CSuperseded by MIL-PRF-83282D (per the D document)
MIL-PRF-87257Hydraulic Fluid, Fire Resistant; Low Temperature, Synthetic Hydrocarbon Base, Aircraft and Missile. The low-temperature companion; named in MIL-PRF-83282D and on the AeroShell Fluid 31 data sheet. Not opened, so none of its limits appear on this page
MIL-H-83282Designation of the fluid tested in NADC-79248-60 (1980); the specification revision is not stated in the report

NATO code H-537 and joint service designation OX-19 are printed on the product data sheets below. The AeroShell Fluid 31 sheet also lists French DCSEA 437/A. Other designations are not listed.

Common Products with MIL-PRF-83282 Data Sheets
ProductClaim as stated on the data sheetData sheet
LANXESS ROYCO 782“meets the requirements of and is qualified to MIL-SPEC: MIL-PRF-83282D Am 1, NATO Code Number H-537” (sheet effective 26 May 2016)LANXESS data sheet
AeroShell Fluid 31Specifications listed as “MIL-PRF-83282D”, French DCSEA 437/A, NATO Code H-537, Joint Service Designation OX-19 (Shell TDS v1.3, 21 July 2021)Shell TDS (reseller copy)
RADCOLUBE FR282 (Radco)Titled “MIL-PRF-83282D(1)”; NATO Code H-537; qualification number NAWCADPAX ltr 4123 Ser 434200A/10.0040, qualification date 28 June 2010Radco data sheet

Products are listed because their data sheets were opened for this page; this is not a Qualified Products List. Claim wording is as printed on each sheet. Other products (for example Castrol Brayco Micronic 882 and NYCO Hydraunycoil FH 2) are sold against the same specification but their data sheets were not available, so they are not listed.

Properties at Measured Temperatures — NADC-79248-60
Property38 °C (100 °F)93 °C (200 °F)149 °C (300 °F)204 °C (400 °F)Source
Density (kg/m³)829793756720NADC Table 2
Kinematic viscosity (mm²/s)18.04.31.81.1NADC Table 1
Dynamic viscosity (mPa·s)14.9223.4101.3610.792Derived: Table 1 × Table 2
Specific heat (kJ/(kg·K))2.0902.2782.4872.696NADC Table 7
Thermal conductivity (W/(m·K))0.1670.1500.1310.112NADC Table 8
Thermal diffusivity (×10⁻⁸ m²/s)9.63868.30366.96745.7699Derived: k/(ρ·cp)
Prandtl number186.751.825.819.1Derived: μ·cp/k
β (×10⁻⁴ 1/K)7.92548.28668.68999.1261Derived: from Table 2 linear fit

Measured MIL-H-83282 values (the 1980 NADC reference lot, lot and revision not stated), atmospheric pressure. Density, kinematic viscosity, specific heat and thermal conductivity are NADC-79248-60 Tables 2, 1, 7 and 8 (the report lists 100, 200, 300 and 400 °F as 38, 93, 149 and 204 °C). Dynamic viscosity, thermal diffusivity, Prandtl number and thermal expansion coefficient are derived from those tables; β = −(1/ρ) dρ/dT from the straight-line fit ρ = 854.002 − 0.65704 T°C kg/m³. The report states an average cubical expansion of 8.3×10⁻⁴ 1/°C over 38–149 °C (p.15) as a cross-check. Specific heat is given in the report in J/(kg·K); it is shown here in kJ/(kg·K). Method, lot and uncertainty are not given in the report. This lot is more viscous at 38 °C than current MIL-PRF-83282D products (14.2 to 15.0 mm²/s at 40 °C on their data sheets).

Specification Limits — MIL-PRF-83282D
PropertyTempMIL-PRF-83282D limitSource
Kinematic viscosity, max−40 °C2,200 mm²/sMIL-PRF-83282D Table II, p.7
Kinematic viscosity, min40 °C14.0 mm²/sMIL-PRF-83282D Table II, p.7
Kinematic viscosity, min100 °C3.45 mm²/sMIL-PRF-83282D Table II, p.7
Kinematic viscosity, min205 °C1.0 mm²/sMIL-PRF-83282D Table II, p.7
Flash point, min—205 °CMIL-PRF-83282D Table II, p.6; base stock also 205 °C in Table I, p.5
Fire point, min—245 °CMIL-PRF-83282D Table II, p.6; base stock also 245 °C in Table I
Auto-ignition temperature, min—345 °CMIL-PRF-83282D Table II, p.5
Pour point, max—−55 °CMIL-PRF-83282D Table II, p.6; Table I p.5 (base stock)
Neutralization (acid) number, max—0.10 mg KOH/gMIL-PRF-83282D Table II, p.6; Table I (base stock 0.10)
Isothermal secant bulk modulus, min40 °C1,379 MPa (200,000 psi), measured over 0 to 69 MPa (6.9×10⁴ kPa)MIL-PRF-83282D Table II, p.5
Evaporation loss, max—20.0 % by weight (base stock 14.0 %); the data sheets quote 205 °CMIL-PRF-83282D Table II, p.6; Table I p.5
Flame propagation, max—0.30 cm/sMIL-PRF-83282D Table II, p.6
Foaming at 25 °C25 °C65 ml max after 5 min blowing; complete collapse after 10 min settlingMIL-PRF-83282D Table II, p.6
Water, max—100 ppmMIL-PRF-83282D Table II, p.7
Barium, max—10 ppmMIL-PRF-83282D Table II, p.5
Swelling of NBR-L rubber—18.0 to 30.0 %MIL-PRF-83282D Table II, p.7
Lubricity, max scar diameter—0.21 mm (1 kg), 0.30 mm (10 kg), 0.65 mm (40 kg)MIL-PRF-83282D Table II, p.6
Specific gravity at 15.6/15.6 °C (60/60 °F)15.6 °Cno limit; determined at qualification, and later lots must be within ±0.008 of itMIL-PRF-83282D Table II, p.7 and note 2/
Operating temperature range—−40 °C to +205 °CMIL-PRF-83282D Scope 1.1, p.1
Base stock viscosity−40 / 100 °C2,600 mm²/s max / 3.5 mm²/s minMIL-PRF-83282D Table I, p.5
Prohibited additives—pour point depressants and viscosity index improversMIL-PRF-83282D 3.2.1.1, p.4

Limits are from the base MIL-PRF-83282D document (30 September 1997). Amendment 1 (10 December 1997) deleted the wick flammability and the high temperature-high pressure spray ignition requirements from Table II and changed the high temperature stability test; it changed none of the limits above. Notice 1 was not opened and the current revision may be later than D Amendment 1. The Table V test methods were not checked, so test-method differences (for example for flash point) are not stated.

MIL-PRF-83282 vs MIL-PRF-5606 — Specification Limits
PropertyMIL-PRF-83282D (Table II)MIL-PRF-5606H (Table II, p.6)MIL-PRF-83282 typical (ROYCO 782 / AeroShell 31 / RADCOLUBE FR282)
Kinematic viscosity, 100 °C (mm²/s)3.45 min4.90 min3.51 / 3.53 / 3.63
Kinematic viscosity, 40 °C (mm²/s)14.0 min13.2 min14.2 / 14.3 / 15.0
Kinematic viscosity, −40 °C (mm²/s)2,200 max600 max2027 / 2059 / 2089
Kinematic viscosity, −54 °C (mm²/s)—2500 max—
Kinematic viscosity, 205 °C (mm²/s)1.0 min—1.08 / 1.06 / 1.085
Flash point (°C)205 min82 min (ASTM D93)218 / 218 / 221 (ASTM D92)
Fire point (°C)245 min—251 / 251 / 251
Auto-ignition temperature (°C)345 min—RADCOLUBE FR282: 370 (ASTM E659)
Pour point (°C)−55 max−60 max−61 / −69 / −69
Acid number (mg KOH/g)0.10 max0.20 max0.03 / 0.02 / 0.08
Evaporation loss (%)20.0 max20 max10.5 / 10 / 17.75
Bulk modulus, isothermal secant, 40 °C (MPa)1,379 min (0 to 69 MPa)1,379 min (at 27.6 MPa)RADCOLUBE FR282: 1,693
Water (ppm)100 max100 max65 / 60 / 27
Operating range (°C)−40 to +205−54 to +135—

MIL-PRF-5606H values are from MIL-PRF-5606H (7 June 2002), Table II; see MIL-PRF-5606 General Properties. Typical values are single-lot data-sheet values, not limits. The two specifications may use different test methods and conditions for flash point, evaporation loss and bulk modulus, so those rows are not strictly like-for-like. Evaporation conditions on the 83282 data sheets are 205 °C (ROYCO: 6.5 h); 5606 sheets quote 6 h at 71 °C.

MIL-PRF-83282 vs MIL-PRF-5606 — Thermophysical Properties
PropertyTemperatureMIL-PRF-83282 (NADC-79248-60)MIL-PRF-5606 (NADC-79248-60)Source
Density (kg/m³)38 °C (100 °F)82984383282 and 5606: NADC Table 2
93 °C (200 °F)793802
149 °C (300 °F)756764
204 °C (400 °F)720724
Kinematic viscosity (mm²/s)38 °C (100 °F)18.014.283282 and 5606: NADC Table 1
93 °C (200 °F)4.35.4
149 °C (300 °F)1.82.9
204 °C (400 °F)1.11.9
Dynamic viscosity (mPa·s)38 °C (100 °F)14.92211.97183282 and 5606: Derived: Table 1 × Table 2
93 °C (200 °F)3.4104.331
149 °C (300 °F)1.3612.216
204 °C (400 °F)0.7921.376
Specific heat (kJ/(kg·K))38 °C (100 °F)2.0901.94483282 and 5606: NADC Table 7
93 °C (200 °F)2.2782.195
149 °C (300 °F)2.4872.425
204 °C (400 °F)2.6962.676
Thermal conductivity (W/(m·K))38 °C (100 °F)0.1670.13583282 and 5606: NADC Table 8
93 °C (200 °F)0.1500.131
149 °C (300 °F)0.1310.126
204 °C (400 °F)0.1120.123
Thermal diffusivity (×10⁻⁸ m²/s)38 °C (100 °F)9.63868.237883282 and 5606: Derived: k/(ρ·cp)
93 °C (200 °F)8.30367.4415
149 °C (300 °F)6.96746.8009
204 °C (400 °F)5.76996.3486
Prandtl number38 °C (100 °F)186.7172.483282 and 5606: Derived: μ·cp/k
93 °C (200 °F)51.872.6
149 °C (300 °F)25.842.6
204 °C (400 °F)19.129.9
β (×10⁻⁴ 1/K)38 °C (100 °F)7.92548.463183282 and 5606: Derived: from Table 2 linear fit
93 °C (200 °F)8.28668.8763
149 °C (300 °F)8.68999.3406
204 °C (400 °F)9.12619.8464

Both columns are from the same NADC-79248-60 tables (MIL-H-83282 and MIL-H-83282 columns), atmospheric pressure, so the comparison is like for like, but the lot and specification revision are not stated for either. The 5606 values are copied unchanged from the MIL-PRF-5606 General Properties page. MIL-PRF-83282 is thicker than 5606 at 38 °C and thinner from about 60 °C up, conducts heat better when cool and worse when hot, and has the higher specific heat at every temperature.

Bulk Modulus (Isothermal Secant) — NADC Table 3
PressureFluid38 °C (100 °F)93 °C (200 °F)149 °C (300 °F)204 °C (400 °F)Source
AtmosphericMIL-H-832821322958694503NADC Table 3
MIL-H-56061288933676489NADC Table 3
20.7 MPaG (3000 psig)MIL-H-8328214321067796613NADC Table 3
MIL-H-560613971043785599NADC Table 3
55.2 MPaG (8000 psig)MIL-H-8328216141250986795NADC Table 3
MIL-H-560615801225968782NADC Table 3

Bulk modulus in MPa gauge. MIL-PRF-83282D requires a minimum isothermal secant bulk modulus of 1,379 MPa (200,000 psi) at 40 °C (Table II, p.5). The RADCOLUBE FR282 data sheet gives a typical 1,693 MPa (1.693×10⁶ kPa) at 40 °C. The NADC MIL-H-83282 sample is a little stiffer than the 5606 sample at every temperature and pressure listed.

Bulk Modulus — Tangent and Adiabatic Values, NADC Tables 4 to 6
QuantityPressure38 °C (100 °F)93 °C (200 °F)149 °C (300 °F)204 °C (400 °F)Source
Isothermal tangentAtmospheric1322958694503NADC Table 4
20.7 MPaG15411177913722NADC Table 4
55.2 MPaG1906154212781087NADC Table 4
Adiabatic secantAtmospheric16261140798558NADC Table 5
20.7 MPaG17611271924680NADC Table 5
55.2 MPaG198514881134883NADC Table 5
Adiabatic tangentAtmospheric16261140798558NADC Table 6
20.7 MPaG189614011050802NADC Table 6
55.2 MPaG2345183514701206NADC Table 6

MIL-H-83282 values in MPa gauge, from the page images of NADC-79248-60 Tables 4, 5 and 6 (psi columns in the report agree). At atmospheric pressure the tangent and secant values are the same by definition, and the adiabatic secant and tangent are the same. The MIL-H-83282 columns of these tables are in the same report and are not repeated here.

Vapor Pressure — NADC Table 16
Property38 °C (100 °F)93 °C (200 °F)149 °C (300 °F)204 °C (400 °F)Source
MIL-H-83282 vapor pressure (Pa)—638332511,970NADC Table 16
MIL-H-83282 vapor pressure (Torr, as printed)—4.82590NADC Table 16
MIL-H-5606 vapor pressure (Pa)13.3399505427,930NADC Table 16
MIL-H-5606 vapor pressure (Torr, as printed)0.1338210NADC Table 16

The report gives no MIL-H-83282 value at 38 °C (blank in the table). Values appear rounded in the report. MIL-H-83282 is more volatile than 5606 at 93 °C (638 against 399 Pa) but less volatile at 149 and 204 °C.

Flash, Fire, Autoignition and Heat of Combustion — NADC Table 10
PropertyMIL-H-83282 (measured)MIL-H-5606 (measured)Source
Flash point (ASTM D92)224 °C (435 °F)99 °C (210 °F)NADC Table 10
Fire point (ASTM D92)254 °C (490 °F)110 °C (230 °F)NADC Table 10
Autoignition temperature (ASTM D2155)371 °C (700 °F)241 °C (465 °F)NADC Table 10
Hot manifold drip ignition temperature (FTMS 791b-6053)327 °C (620 °F)560 °C (1040 °F)NADC Table 10
Hot manifold / high pressure spray ignition temperature (modified FTMS 791b-6053)816 °C (1500 °F)>816 °C (1500 °F)NADC Table 10
Wick flammability (ASTM 3150C), cycles161NADC Table 10
Linear flame propagation rate (cm/s)0.33 (10 of 10 tests)0.76 (10 of 10 tests)NADC Table 10
Oxygen index (modified ASTM D2863)18.016.1NADC Table 10
Mist flash back5.8 cm (2.3 in)7.6 cm (3.0 in)NADC Table 10
Low pressure spray ignition (AMS 3150C)Carries flameIncreases flameNADC Table 10
High pressure spray ignition (AMS 3150C)Ignites, self extinguishingIgnites and continues to burnNADC Table 10
Heat of combustion (ASTM D240)42,000,000 J/kg (18,000 BTU/lb)42,000,000 J/kg (18,000 BTU/lb)NADC Table 10 continued, p.41

Measured in the 1980 NADC report, so the numbers are for that reference lot and not for a current product. Current data sheets show a flash point of 218 to 221 °C and a fire point of 251 °C, and RADCOLUBE FR282 shows an autoignition temperature of 370 °C (see the typical values below). The hot manifold result runs the opposite way to the other tests: MIL-H-83282 ignites at the higher temperature because it is more volatile and evaporates before it reaches the hot surface (report text, printed p.15). Amendment 1 to MIL-PRF-83282D removed the wick flammability and high temperature-high pressure spray ignition requirements.

Manufacturer Typical Values (not measurements)
SourcePropertyTypical value
ROYCO 782 (26 May 2016)Kinematic viscosity (ASTM D445, mm²/s)2027 @ −40 °C; 14.2 @ 40 °C; 3.51 @ 100 °C; 1.08 @ 205 °C
ROYCO 782 (26 May 2016)Flash point (ASTM D92) / fire point (ASTM D92)218 °C (424 °F) / 251 °C (483 °F)
ROYCO 782 (26 May 2016)Pour point (ASTM D97)−61 °C (−77 °F)
ROYCO 782 (26 May 2016)Specific gravity (ASTM D1298), 15.6 °C0.852
ROYCO 782 (26 May 2016)Neutralization number (ASTM D664) / water (ASTM D6304)0.03 mg KOH/g / 65 ppm
ROYCO 782 (26 May 2016)Evaporation, 205 °C, 6.5 h10.5 % loss
ROYCO 782 (26 May 2016)Lubricity, 4-ball scar (ASTM D4172, 75 °C)0.14 / 0.21 / 0.44 mm at 1 / 10 / 40 kg
AeroShell Fluid 31 (TDS v1.3, 2021)Kinematic viscosity (ASTM D445, mm²/s)2059 @ −40 °C; 14.3 @ 40 °C; 3.53 @ 100 °C; 1.06 @ 205 °C
AeroShell Fluid 31 (TDS v1.3, 2021)Flash point (ASTM D92) / fire point COC (ASTM D92)218 °C / 251 °C
AeroShell Fluid 31 (TDS v1.3, 2021)Pour point (ASTM D97)−69 °C
AeroShell Fluid 31 (TDS v1.3, 2021)Specific gravity (ASTM D1298), 15.6/15.6 °C0.851
AeroShell Fluid 31 (TDS v1.3, 2021)Total acid number (ASTM D664) / water (ASTM D1744)0.02 mg KOH/g / 60 mg/kg
AeroShell Fluid 31 (TDS v1.3, 2021)Evaporation loss, 205 °C10 %
AeroShell Fluid 31 (TDS v1.3, 2021)Lubricity, 4-ball scar (ASTM D4172, 75 °C)0.16 / 0.22 / 0.51 mm at 1 / 10 / 40 kg
RADCOLUBE FR282 (Radco)Kinematic viscosity (ASTM D445, mm²/s)2089 @ −40 °C; 15.0 @ 40 °C; 3.63 @ 100 °C; 1.085 @ 205 °C
RADCOLUBE FR282 (Radco)Flash point / fire point (ASTM D92)221 °C / 251 °C
RADCOLUBE FR282 (Radco)Auto-ignition temperature (ASTM E659)370 °C
RADCOLUBE FR282 (Radco)Bulk modulus, isothermal secant, 40 °C1.693×10⁶ kPa (1,693 MPa)
RADCOLUBE FR282 (Radco)Pour point (ASTM D97)−69 °C
RADCOLUBE FR282 (Radco)Specific gravity (ASTM D1298), 15.6/15.6 °C0.838
RADCOLUBE FR282 (Radco)Neutralization number (ASTM D664) / water (ASTM D1744)0.08 mg KOH/g / 27 ppm
RADCOLUBE FR282 (Radco)Evaporation (FTMS 350) / NBR-L swelling (FTMS 3603)17.75 % / 18.98 %
RADCOLUBE FR282 (Radco)Lubricity, scar diameter (ASTM D4172)0.20 / 0.23 / 0.46 mm at 1 / 10 / 40 kg

Single-lot typical values from manufacturer data sheets for products sold against MIL-PRF-83282D; they are not measurements made for this site and carry no stated uncertainty. The AeroShell sheet says typical values are of current production and variations may occur. The RADCOLUBE FR282 sheet still shows the wick flammability and spray ignition rows that Amendment 1 deleted. The NADC 1980 lot is more viscous at 38 °C than any of these products.

Sources
  • A. A. Conte Jr. and J. L. Hammond, Development of a High Temperature Silicone Base Fire-Resistant Hydraulic Fluid, NADC-79248-60, Naval Air Development Center, Warminster PA, 5 Feb 1980. DTIC ADA081597. apps.dtic.mil/sti/tr/pdf/ADA081597.pdf. Tables 1 to 8, 10 and 16 (MIL-H-83282 and MIL-H-83282 columns) and text p.15, accessed 25 Oct 2026. The report page images were read; the text layer is scrambled.
  • US Department of Defense, MIL-PRF-83282D, Performance Specification: Hydraulic Fluid, Fire Resistant, Synthetic Hydrocarbon Base, Metric, NATO Code Number H-537, 30 September 1997, with Amendment 1 (10 December 1997). everyspec.com. Table I (p.5), Table II (pp.5–7) limits; scope.
  • US Department of Defense, MIL-PRF-5606H, Performance Specification: Hydraulic Fluid, Petroleum Base; Aircraft, Missile, and Ordnance, 7 June 2002. everyspec.com. Table II (p.6) limits used in the comparison.
  • LANXESS, ROYCO 782 Synthetic Fire Resistant Hydraulic Fluid Data Sheet, effective 26 May 2016. ROYCO 782 data sheet. Typical values and qualification claim.
  • Shell, AeroShell Fluid 31 Technical Data Sheet, v1.3, 21 Jul 2021. AeroShell Fluid 31 TDS (reseller copy). Typical values and specification list.
  • Radco Industries, MIL-PRF-83282D(1) RADCOLUBE FR282 data sheet. RADCOLUBE FR282 data sheet. Typical values and qualification details.

The NADC report does not state the specification revision or lot of the MIL-H-83282 tested, and gives no measurement uncertainty. Manufacturer values are single-lot typicals. MIL-PRF-87257 is mentioned only because MIL-PRF-83282D and the AeroShell sheet name it; it was not opened. Data are also listed in tools/mil-prf-83282-sources.json and tools/mil-prf-83282-derived.json.

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