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Page Title:
Embrittlement of striker spring, trigger spring and retainer |
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|  MIL-F-20420J(AR)
4.4.4 Inspection equipment. The inspection equipment required
to perform the examinations and tests prescribed herein is described
in the 'Paragraph Reference/Inspection Method' column in the table
starting with paragraph 4.4.2.1. The contractor shall submit for
approval inspection equipment designs in accordance with the terms
of tune contract. See Section 6 of MIL-A-48078 and 6.- herein.
4.5 Test methods and procedures
4.5.1 Embrittlement of striker spring, trigger spring and
retainer.
The spring shall be stretched along its longitudinal axis
until it no longer returned to its original length or profile it
shall be considered permanently distorted. Any spring that breaks
during the test shall be classed defective. Springs subjected to
test shall not be returned to the lot.
(Destructive Test)
4,5.3 Moisture content or volatile content, as applicable.
(Destructive Test)
4.5.3.1 Baffle and asbestos. The moisture content shall be
determined in accordance with Method 102.1 of MIL-STD-1234.
4.5.3.2 Intermediate charge composition. The volatile content
of the intermediate charge composition shall be determined in
accordance with 4.5.3.1.
4.5.3.3 Illuminant and ignition composition. The moisture
content of the illuminant and ignition composition shall be
determined as follows: A 10 gram sample shall be added to a flask
with 100 ml. of methyl alcohol. The flask shall be covered and
allowed to stand for one-half hour. A 50 ml. aliquot shall be
removed from the flask and added to the Karl Fischer flask. The
sample shall be titrated with the Karl Fischer reagent. A blank
with methyl alcohol shall be titrated in the same manner as above.
The Karl Fischer reagent shall be standardized as specified in
MIL-STD-1234, Method 101.2 except F shall be mg/ml. The calculation
for moisture content shall be as follows:
Where:
=
Ml. of KF used to titrate sample moisture.
V
Standardization factor.
F
=
=
Ml. of KF used to titrate blank moisture.
S
10
=
Factor to convert to percent.
5
=
Weight of sample contained in aliquot used.
4.5.3.4 First fire composition. The volatile content of the
sample shall be determined as specified in 4.5.3.1.
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