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| MIL-C-46941A
Presence of Primer Charge
No Material Defects
4.7.2 Hardness. Ten units from each heat-treated lot of components shall be tested with a
hardness tester. Failure of any unit to comply with the requirements of the drawings shall be
cause for rejection of the lot of components.
4.7.3 Protective finish. Procedures for the determination of acceptability of coated parts
shall be in accordance with the contract and MIL-A-8625.
4.7.4 Radiographic examination. All assembled cartridges shall be radiographically examined
in accordance with MIL-STD-453. The cartridges shall be positioned on their sides for the most
revealing exposure. All cartridges shall be identified with serial numbers prior to examination.
The serial numbers shall be in consecutive order beginning with the number 001 in each production
lot. The cartridges shall be arranged on trays or boards in consecutive numerical order, and each
radiograph shall carry a permanent identification of the cartridges displayed thereon. The
radiographic plate identification shall include item nomenclature, the complete lot number as
stamped on the cartridges, the span of serial numbers displayed, and the contract number.
Cartridges having any observable imperfections in assembly shall be cause for rejection.
Radiographs of the entire production lot shall accompany the ballistic sample to the activity
conducting the production lot acceptance test. Discontinuities in serial numbers shall be
identified on the x-ray negative. Defective cartridges, found by the vendor, shall be clearly
identified on the negative and those defectives removed from the production lot. The serial
numbers shall be pen or ink stamped on the cartridge with approximately 1/8-inch-high characters.
The serial numbers shall be located apart from the other cartridge markings (see 6.2).
4.7.5 Airtightness. Each cartridge shall be subjected to specified pressure differential.
The method for determining airtightness shall be with a helium mass spectrometer. The helium leak
rate shall be converted to standard cubic centimeters of air. Failure to comply with the
requirements of 3.5.2 shall be cause for rejection of the cartridge.
4.7.6 Sealant application. Five cartridges from each production lot shall be selected for
this test. Failure of any cartridge to comply with the drawing requirements shall be cause for
rejection of the lot of cartridges.
4.7.7 Vibration test. Twelve of the 21 assembled cartridges of the first article sample,
x-rayed as directed in 4.7.4, properly identified, shall be subjected to vibration. The method
and procedures for performing the vibration test shall be in accordance with MIL-STD-810, Method
514.3, Test Procedure I, Test Condition I-3.2.5 (see 6.2). Then the 12 vibrated cartridges shall
be x-rayed again. Evidence of any disintegration of the primer, propellant, or igniter, or
derangement of any component shall be cause for rejection of the sample.
4.7.8 Functional. The following tests shall be performed by the Government.
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