MIL-PRF-3572B
4.2.1 Inspection conditions. Unless otherwise specified (see 6.2), all inspections shall be
performed in accordance with the test conditions specified in FED-STD-791, Method 9601.
4.3 Performance requirements verification. Complete the verifications in section 4.2 through
section 4.3.11.1.
4.3.1 Verification methods. Acceptable verification methods included in this section are visual
inspection, measurement, sample tests, full-scale demonstration tests, simulation, modeling,
engineering evaluation, component properties analyses, and similarity to previously approved or
previously qualified designs.
4.3.2 Verification alternatives. The manufacturer may propose alternative test methods,
techniques, or equipment, including the application of statistical process control, tool control, or
cost-effective sampling procedures to verify performance. Refer to the contract for alternatives
that replace verifications required by this specification.
4.3.3 Foreign matter. The lubricant shall be visually inspected or examined for any lumps or
foreign matter.
4.3.4 Viscosity. The viscosity shall be determined in accordance with ASTM D 445.
4.3.5 Flash point. The flash point shall be determined in accordance with ASTM D 92.
4.3.6 Pour point. The pour point shall be determined in accordance with ASTM D 97.
4.3.7 Solids content. The solids content (mass percent) shall be determined in accordance
with ASTM D 524. A sample of 0.5 g of the lubricant shall be used.
4.3.8 Ash. The ash (mass percent) shall be determined in accordance with ASTM D 482.
A sample of 10.00 +/- 0.01 g of the lubricant shall be used.
4.3.9 Hiding power. The hiding power of the lubricant (containing 2 weight percent of the
solids) shall be determined by using either the Pfund Cryptometer or ASTM D 2805. If using the
Pfund Cryptometer method, a plate of wedge constant of 0.0002 shall be used.
4.3.9.1 Dilution of grades B and C. Grades B and C are too opaque for examination and
shall be blended with a neutral refined petroleum oil of the characteristics given below A
2.00 +/- 0.01 g portion of the grade B or C lubricant is diluted to 10.00 +/- 0.01 g with the
oil specified above and the mixture thoroughly blended at a temperature of approximately
66° C.
Relative density
0.9100 - 0.8984
Flash point, ° C (minimum)
202
ISO viscosity grade
68
Viscosity, cSt at 100° C
7-8
4.3.10 Stability. The stability shall be determined by centrifuging and analyzing samples
using ASTM D 524.
4
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business