MIL-DTL-2439F
4.5 Tests.
4.5.1 Outer cover construction. Construction of the outer and cover tubes shall be verified
visually and with standard measurement equipment to Figure 1, for Type I, II, and III tubes or
Figure 2 for Type IV tubes or Figure 3 for Type V tubes. Verification shall be performed on a
cross section by cutting the sample with a knife or other sharp instrument. The layers of the
outer tubes and the cover tube shall then be separated for identification purposes. If the
construction of the tubes does not match the required reference figure the sample shall be
rejected.
4.5.2 Neck tubes.
4.5.2.1 Neck tube construction. Construction of neck tubes shall be verified to Figure 4, for Type
I, II, and III tubes or Figure 5 for Type IV tubes or Figure 6 for Type V tubes. Verification shall
be performed on a cross section by cutting the sample with a knife or other sharp instrument.
The layers of the outer tubes and the cover tube shall then be separated for identification
purposes.
4.5.2.2 Neck tube vent holes. Pressure relief perforations in the neck tube shall be verified with
the use of standard measurement equipment. Observations shall be made on a cross section of a
completed item by cutting the sample with a knife or other sharp instrument. Perforations that do
not comply with Figure 8 shall be cause for rejection of the sample.
4.5.2.3 Neck tube security torque test. The container shall be assembled into the fixture shown
in Figure 10, or an approved equivalent. The product shall fail if the torque specified in Table II
is applied and the neck tube is removed or loosened. Care shall be exercised to prevent damage
to the crimp of the metal end of the container tube.
4.5.3 Neck rings.
4.5.3.1 Neck ring construction. A cross section of a completed item shall be created by cutting
the sample with a knife or other sharp instrument and measured with standard measurement
equipment.
4.5.3.2 Neck ring material. Analysis shall be done to verify conformance with commercial
standard (See 6.2.h).
4.5.3.3 Plating thickness. The neck rings shall be tested in accordance with ASTM E 376 (69,
Part 31). If plating thickness is found to be unacceptable for the requirement, it shall be cause
for rejection.
4.5.3.4 Salt spray test. The neck rings shall be tested as specified in ASTM B 117 (73). The
evaluation shall be performed immediately after removal from the salt fog.
4.5.3.5 Polyester tape. When used, the polyester tape shall be applied in accordance with Figure
9. Dimensions shall be verified with standard measurement equipment.
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