MIL-DTL-3060G (AR)
4.4.4.2 Hot water method for airtightness. The hot water procedure for each container should be
submitted to the Government for approval. The test procedure should include water temperature,
immersion time, the data to support time and periodic verification procedure. The assembled container
should be tested for leakage by immersing the closed container to a depth of one inch below the surface of
the water. The temperature of the water and the length of time of immersion should be that which will
assure an increase in pressure to a minimum of 3 psi above ambient pressure. Observation for air leakage
from the interior of the box assembly should be made during the period of pressure build up and for a
minimum of 16 seconds after the 3 psi pressure differential has been reached.
4.4.4.3 Dry vacuum method for airtightness. The dry vacuum test procedure should be submitted
to the Government for approval. The test procedure should include periodic verification procedure and
test device specification. The assembled container should be tested for leakage in a dry vacuum chamber
by using an Army Peculiar Equipment (APE) 1958 test device or equal. Air leakage should not exceed .4
cubic centimeters for a minimum of 5 seconds.
4.4.5 Weld security.
4.4.5.1 Cover handle assembly. The assembled box shall be clamped with the sample body
assembly resting on its bottom. Attach the test fixture to the cover handle. With one fixture securely held,
apply the specified tensional force through the other test fixture, vertical to the box bottom against the
ferrule of each handle. The force shall be applied at a rate of .125 to .25 inch per minute and held for one
minute. After removal of the force, examine the handle and hasp for distortion and weld failure.
4.4.5.2 Latch, cover, and hinge assembly (M19A1). The assembly shall be tested in a suitable
fixture with the box resting on its bottom and with the cover raised at a right angle. The box shall be
clamped securely and the body assembly shall be supported by means of a snug fitting wood filler box in
order to prevent its distortion or collapse. Secure the other test fixture to the latch assembly and slowly
apply a tensional force perpendicular to the body assembly. The force shall be applied at a rate of .125 to
.25 inch per minute and held for one minute. After removal of the force, examine the latch, latch link,
latch link retainer, cover, cover hinge and body hinge for distortion and weld failure.
4.4.5.3 Cover hinge assembly (M2A1). The assembly shall be tested in a suitable fixture with the
box resting on its bottom with the cover raised at a right angle. The box shall be clamped securely and
the body assembly shall be supported by means of a snug fitting wood filler box in order to prevent its
distortion or collapse. Secure the other test fixture to the cover and slowly apply a tensional force
perpendicular to the body assembly. The force shall be applied at a rate of .125 to .25 inch per minute
and held for one minute. After removal of the force, examine the cover, cover hinge and the body hinge
for distortion and weld failure.
4.4.5.4 Hasp assembly. The sample body assembly resting on their bottoms shall be clamped in a
suitable device. Using a test fixture clamped securely on the hasp assembly, the specified force shall be
slowly applied perpendicular to the bottom and against the underside of the offset of the hasp. The force
shall be applied at a rate of .125 to .25 inch per minute and held for one (1) minute. After removal of the
force, examine the hasp for distortion and weld failure.
4.4.6 Gasket compression. (see dwg. 7553315/ 7553296 as applicable) .
4.4.6.1 Compressed gasket and cover measurements (Applicable to M19A1). The box shall be
positioned in a suitable fixture so that it cannot be moved (see 6.3). For the M19A1, four points, two on
each side, two inches from the front and the rear, shall be located (and numbered 1, 2, 3, and 4) on both
the body and cover. With the body fully closed, a reading at each point, with a standard height gage, shall
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