MIL-DTL-60286C
AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)
ASTM E 1742
Standard Practice for Radiographic Examination
(Application for copies of ASTMs should be sent to the American Society for Testing and Materials, 100
Barr Harbor Drive, West Conshohocken, PA 19428-2959)
2.4 Order of precedence. In the event of a conflict between the text of this document and the
references cited herein (except for related associated specifications or specification sheets), the text of
this document takes precedence. Nothing in this document, however, supersedes applicable laws and
regulations unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Materials. All materials used in the manufacture of the initiators shall conform 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.
3.2 Components.
3.2.1 Primary components. For the purpose of this specification, the M91 impulse cartridge (Drawing
8597230) is defined as a primary component. Only primary components from a single lot shall be used in
a production lot of initiators; however, one primary component production lot may be used in more than
one initiator production lot.
3.2.2 Component parts. All component parts shall meet the applicable requirements of
MIL-DTL-48412 or MIL-DTL-60519 prior to assembly.
3.3 Breakaway torque. The chamber and cap of each assembled initiator shall withstand a breakaway
torque application of 400 inch-pounds without loosening or deformation (see 4.3.1).
3.4 Residual magnetism. The initiator shall not deflect the indicator of the compass more than five
degrees in either direction (see 4.3.2).
3.5 Radiographic examination. Each initiator assembly shall be radiographically examined for defects
(see 4.3.3).
3.6 Functional.
3.6.1 Ballistics. Initiators loaded with cartridges from one accepted lot and temperature conditioned
shall perform within the pressure values and delay times (see 6.4.1) specified in table I. Pressure values
shall be recorded at the end of 15 feet of aircraft hose, assembly number MS28741-4, and a pressure
chamber with a volume of 1 cubic inch.
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