MIL-DTL-50374B
TABLE II. Conditioning temperature.
Temperature (°F)
Sample Size
-60 to -70
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65 to 75
7
195 to 205
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4.2.3.3.2 Retest. There shall be no retests.
4.2.3.3.3 Test failure. If a test failure is attributable to an assignable cause, excluding the test
initiator, the original test results shall be discarded and that test reconducted.
4.3 Test methods and procedures.
4.3.1 Breakaway torque. A torque wrench set as specified in 3.4 shall be used in conjunction with a
fixture to determine the adequacy of the joint.
4.3.2 Residual magnetism. The assembly shall be tested for excessive residual magnetism using an
approved compass in an area free of local magnetic effects by placing the assembly 5 inches from the end
at the same height as the compass, in a north-south horizontal position (cap end at south) with the compass
set in an east-west heading. The assembly shall be moved at a speed no greater than 10 feet per minute
past the compass for its entire length, rotated 90 degrees in the horizontal position about its longitudinal
axis, and moved slowly back past the compass. This procedure shall be repeated for each 90 degree
rotation of the assembly for four full passes.
4.3.3 Radiographic examination. All assembled initiators shall be radiographically examined in
accordance with ASTM E 1742, with the exception that an initiator assembly will be used for the
penetrameter. Any observable imperfections in components or assembly shall be cause for rejection. The
initiators shall be positioned for the most revealing exposure, with the long axis of each assembly
perpendicular to the rays of the X-ray machine. All initiators shall be identified with serial numbers prior
to X-ray examination. The serial numbers shall be in consecutive numerical order beginning with the
number 001 in each production lot. Any missing numbers are to be identified on the X-rays. The initiators
shall be arranged on trays or boards in consecutive order, and each radiograph shall carry a permanent
identification of the units displayed thereon. The radiographic plate identification shall include item
nomenclature, the complete lot number, the span of serial numbers displayed, and the contract number.
The radiographs of the entire production lot shall accompany the ballistic sample to the activity conducting
the production lot acceptance test. Defective initiators found during X-ray review are to be marked on the
X-ray prior to shipment and those defective items shall be removed from the production lot. Film
interpretation of the radiographs shall verify the presence and correct positioning of the following parts:
a. Flash tube, P/N 10551453
b. II-A Potassium nitrate pellets, MIL-P-46994
c. Sealing rings, P/N 10551451
and shall also verify that:
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