MIL-DTL-50647B
(Copies of these documents are available online at https://www.asq.org/ or from the American Society for
Quality, PO Box 3005, 611 E. Wisconsin Ave., Milwaukee, WI 53201-4606.)
AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)
ASTM E1742
Standard Practice for Radiographic Examination
(Copies of this document are available online at https://www.astm.org/ or from the American Society for
Testing and Materials Customer Service, 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, 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 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 M293 Delay Cartridge covered by this specification shall be
manufactured in accordance with DL11730546 and all documents listed thereon.
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 PVU-1/A Ignition Device, 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 Ignition device. The ignition device shall be furnished from lots manufactured within the
preceding 24 months or recertified within the preceding 12 months. The ignition device shall be
manufactured per Drawing 851AS110 and accepted per WS 21535. Prior to assembly into a cartridge, the
ignition device 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.
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