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|  MIL-C-60872A
3.4 Components.
3.4.1 Primary components. For the purpose of this specification, the M42 Primer, M75 Delay Element,
Igniter Charge and the cartridge propellant charge are considered primary components. Only primary
components from a single lot shall be used in a production lot of cartridges; however, one primary component
production lot may be used in more than one cartridge production lot.
3.4.1.1 Primer. The primer shall conform to the applicable drawing and reference specification. Only
primers from lots manufactured within the last 24 months or recertified within the last 12 months shall be used
in these units. Prior to assembly into a cartridge, the primer shall be radiographically examined for defects
as specified in 4.7.1.
3.4.2 Hardness. The hardness of each component part shall be in accordance with the applicable drawing
(see 4.7.2).
3.4.3 Protective finish. The finish of each component part shall be in accordance with MIL-A-8625 and
the applicable drawing (see 4.7.3).
3.5 Assembly.
3.5.1 Radiographic examination. Each cartridge assembly shall be radiographically examined for
defects (see 4.7.4).
3.5.2 Airtightness. Each assembled cartridge shall exhibit no air leakage greater than 1 x 10-4 standard
cubic centimeters per second (see 4.7.5) at a 14.7 psia pressure differential.
3.5.3 Vibration. The assembled cartridge shall withstand vibration as prescribed in MIL-STD-810,
Method 514.3, Test Procedure I, Test Condition I 3.2.5 without evidence of any disintegration of the primer,
propellant, or igniter, or derangement of any component (see 4.7.7 and 6.2).
3.6 Functional requirements.
3.6.1 Primer sensitivity. The primer shall fire when drop tested at an energy level of 26 inch-ounces in
a sectioned cartridge void of igniter and propellant charge (see 4.7.8.1).
3.6.2 Cartridge performance.
3.6.2.1 Misfires. The cartridge shall not fail to fire.
3.6.2.2 Ballistics. The cartridge, when tested in a M110 initiator, shall produce the pressures and delay
times (see 6.5.1) at temperatures specified in table I (see 4.7.8.2). Pressure values shall be produced in a one
cubic inch pressure station at the end of 15 feet of hose in accordance with MS28741-4, at 70 5F.
TABLE I. Ballistic requirements.
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