MIL-PRF-23942A(AS)
4. VERIFICATION
4.1 Classification of inspections. The inspection requirements specified herein are classified
as follows:
a. First article inspection (see 4.3)
b. Conformance inspection (see 4.4)
4.2. Lot size. A lot shall consist of material produced by one manufacturer in one
continuous operation employing not more than one lot of each ingredient and with no change in
formulation or process. If manufacture is by batch process, batches may be combined to form a
lot provided not more than one lot of each ingredient and no change in formulation or process is
used.
4.3 First article inspection. When required (see 6.2), the first article inspection shall consist
of all the tests required for conformance inspection.
4.4 Conformance inspection. Conformance inspection shall consist of all the performance
tests specified in 4.5.
4.4.1 Conformance sampling. Each lot shall be sampled as specified in the contract or order
(see 6.2). All samples shall be selected at random from each lot. There shall be no defects.
4.5 Performance tests. All tests shall be performed to determine conformance with table I.
4.5.1 Viscosity at 77°F and 100°F. The apparatus and procedures for the determination of
viscosity at 77°F and 100°F shall be as follows:
4.5.1.1 Apparatus.
a. Brookfield viscometer, Model RVF, Brookfield Engineering Laboratories, or
equivalent.
b. Constant temperature water baths, maintained at 77°F and 100°F.
4.5.1.2 Procedure.
a. Remove the handle and mount the viscometer on a ring stand. Carefully attach the
Brookfield No. 7 spindle. If a different spindle or speed is used, consult the chart accompanying
the instrument for the multiplying factor.
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