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| MIL-C-46941A
3. REQUIREMENTS
3.1 First article. When specified in the contract or purchase order, a first article sample
shall be subjected to first article inspection (see 4.4, 6.2, and 6.3).
3.2 Conformance to documents. The M146 Impulse Cartridge covered by this specification shall
be manufactured in accordance with DL8596426.
3.3 Materials. All materials used in the manufacture of the cartridges shall conform strictly
to the specifications referred to on the respective drawings unless specific approval in writing
covering a departure therefrom has been obtained from the cognizant Navy design activity prior to
manufacture. When alternate materials or methods of manufacture are specified on the drawings,
the bidder's selections shall be clearly stated in the proposal.
3.4 Components.
3.4.1 Primary components. For the purpose of this specification, the primer, igniter charge
andthecartridgepropellant 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. Prior to assembly into a cartridge, the primer shall be visually examined in
accordance with 4.6.2 and 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
-4
10 standard cubic centimeters of air per second at a 14 psia pressure differential (see 4.7.5).
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
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