MIL-DTL-22529D (AS)
4.2.1 Inspection lot. An inspection lot shall consist of all grommets of
the same size produced under essentially the same conditions and offered for
inspection at one time.
4.2.2 Sampling plan. Samples shall be selected at random, from each
production lot, in accordance with Table I and II.
4.2.3 Dimensions. The grommets shall be checked dimensionally to
determine conformance to the dimensions specified on the applicable
specification sheet.
4.2.4 Preparation for delivery. Each of the fully prepared shipping
containers, containing grommets, shall be visually examined to determine that
the packaging, packing and marking conform to the requirements of Section 5.
4.2.5 Immersion test. With the following fluids heated to, and
maintained at a temperature of 50° + 2° - 0°C, two grommet assemblies (se
6.3.1) shall be immersed in each of the fluids for a minimum of one hour.
a.
Isopropyl Alcohol conforming to TT-I-735
b.
Hydraulic Fluid, Petroleum base, Aircraft Missile and Ordnance,
conforming to MIL-H-5606
c.
Turbine fuel, Aviation Grades JP-4, JP-5 and 5/JP-8 ST conforming to
MIL-T-5624
d.
Lubricating Oil, Aircraft Turbine Engine, Synthetic Base, conforming
to MIL-L-7808
e.
Upon completion of the immersion test, the grommet assembly shall be
wiped dry and shall remain for 1 hour in free air at room
temperature. The grommets shall conform to the requirements
specified in 3.2.2. The grommets shall then be subjected to and pass
the dielectric strength test (see 4.2.9).
4.2.6 Temperature cycling test. Grommets shall be tested in accordance
with MIL-STD-202, Method 102A, Condition D, except Step 3 shall be per Table
III.
Table III
+3°-0°C
Grommet Type
82°
MIL-DTL-22529/2
125°
Nylon MS21266
142°
MIL-DTL-22529/1
275°
TFE MS21266
The grommets shall conform to the requirements specified in 3.2.3. The
grommets shall then be subjected to, and pass the dielectric strength test
(see 4.2.9).
5
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