1、-. MIL-C-bOB72A 13 = 9999906 0507677 2 m! I INCH-POUND I MIL-Cd0872A 15 Januarv 1992 SUPERSEDING 25 April 1968 MIL-Cd0872(MU) MILITARY SPECIFICATION CARTRIDGE, DELAY, M271 ASSEMBLY is spec#cation is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. Th
2、is specification covers the requirements for the M271 Delay Cartridge (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications and standards form a part of this document to the extent specified herein. Unless otherwise
3、specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplements thereto, cited in the solicitation (see 6.2). SPECIFICATIONS MILITARY MIL-A-2550 Ammunition, General Specification for MIL-A-8625 Anodic
4、Coatings, for Aluminum and Aluminum Alloy STANDARDS MILITARY MIL-STD-105 MIL-STD-109 Sampling Procedures and Tables for Inspection by Attributes Quality Assurance Terms and Definitions Beneficial comments (recommendations, additions, deletions) d any pertinent distribution is unlimited. 0 Provided b
5、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-60872A 13 E 9999906 0507678 4 E MIL-C-60872A MIL-STD-453 Inspection, Radiographic MIL-STD-810 Environmental Test Methods and Engineering Guidelines MS28741 Hose Assembly Detachable End Fitting Medium Pressu
6、re (unless otherwise indicated, copies of federal and military specifications and standards are available from Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 191 11-5094,) 2.1.2 Other Government documens, drawings, and publications. The following Government d
7、rawings form a part of this specification to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation (see 6.2). DRAWINGS NAVAL ORDNANCE STATION (CAGE Codes 19200 and 19203) DL1055 1590 Cartridge, Delay, M271 Assembly 8864168 Box, Fiberboard (Inner), Pa
8、cking, Ammunition, For Cartridge, Delay: M27 1 8864169 Box, Fiberboard (Outer), Alternative, Packing, Ammunition, For Cartridge, Delay: M271 92 14156 Box, Packing, Ammunition, For Cartridge, Delay: M271 (Application for copies should be addressed to: Commanding Officer, Naval Ordnance Station, Data
9、Control Branch (Code 3720), Indian Head, MD 20640-5035.) 2.2 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 un
10、less a specific exemption has been obtained. 3. REQUPREMENTS 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). be manufactured in accordance with DL10551590 and all documents listed ther
11、eon. 3.2 Conformance to documents. The M271 Delay Cartridge covered by this specification shall 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 de
12、parture therefrom has been obtained from the cognizant Navy design activity prior to manufacture. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- , MIL-C-bOB72A 13 W 99999Ob 0507679 b W MIL-C-60872A When alternate materials or methods of manufactu
13、re are specified on the drawings, the bidders selections shall be clearly stated in the proposal. 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.
14、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
15、 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 i
16、n 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
17、 defects (see 4.7.4). 3.5.2 Airtightness. Each assembled cartridge shall exhibit no air leakage greater than 1 x 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, Me
18、thod 514.3, Te however, this does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to accept defective material. 4.1.2 Quality assurance terms and definitions. Reference shall be made to MIL-STD-109 to define the quality assurance te
19、rms used. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MIL-C-bO72A 13 W 999990b 0507b1 4 MIL-C-60872A 4.1.3 Inspections. Inspections shall be in accordance with MIL-A-2550 and MIL-STD-453. 4.2 Classification of inspections. The inspection requ
20、irements specified herein are classified as follows: a. b. First article inspection (see 4.4) Quality conformance inspection (see 4.5) 4.3 Inspection conditions. Unless otherwise specified in the contract or purchase order (see 6.2), inspection conditions shall be as follows: a. Temperature: Room am
21、bient 20“ to 25“ C (68“ to 77“ F) b. Altitude: Sea level c. Humidity: 50 percent relative, maximum d. Atmospheric: 14.7 psia 4.4 First article inspection. At the beginning of regular production, the contractor shall submit a first article sample to a Government approved facility for evaluation. The
22、sample shall consist of 21 assembled cartridges for ballistics testing including 12 for vibration tests, 5 assembled cartridges for sealant tests, 10 sets of unassembled components for dimensional and visual examination, and the quantity specified in accordance with 4.4.2, Le., cartridges assembled
23、without the igniter and propellant charge for primer sensitivity test. The first article sample shall be manufactured using the same materials, equipment, processes, and procedures as used in regular production. All parts and materials, including packaging and packing, shall be the same as used for
24、regular production and shall be obtained from the same source of supply. When it becomes necessary to make a change in either the primer, propellant, or igniter lot after initial production, 12 assembled cartridges from the first production lot thereafeer shall be tested in accordance with 4.7.7. Th
25、e Government reserves the right to require new first article samples until such time as an acceptable sample is submitted (see 6.3). 4.4.1 Examination, tests, and facility. After provisional acceptance at source, the sample shall be inspected for all requirements of the drawings and specifications a
26、t a Government laboratory or other such facility specified in the contract (see 6.2). 4.4.2 Sample size for primer sensitivity. The number of cartridges assembled without igniter or propellant to be submitted for primer sensitivity tests shall be in accordance with table II. 5 Provided by IHSNot for
27、 ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-bOB72A 13 9999906 0507682 b Lot size 3 to 15 MIL-C-60872A Sample size 3 TABLE II. Primer sensitivitv. 181 to 300 301 to 500 501 to 800 801 to 1300 25 30 35 40 II 16 to 25 I Temperature (OF) -60 to -70 4 Not vibrated Vi
28、brated 3 4 41 to 65 II 66to 110 I 10 II 111 to 180 I 15 II II Over 1300 I 50 II 4.4.3 Temperature conditioning for ballistic test. The sample shall be temperature conditioned and tested to determine compliance with 3.6.2.2. The sample for firing shall be Conditioned to table III. TABLE III. Temperat
29、ure conditioning. II 65 to 75 I 3 I 4 II II 195 to 205 I 3 I 4 II 4.4.4 First article failure. Failure of the sample to comply with the requirements of the drawings and specifications shall result in first article sample disapproval. 4.5 Quality conformance inspection. 4.5.1 Lot. 4.5.1.1 Submission
30、of product. The product shall be submitted in accordance with MIL-STD-105. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NIL-C-bO872A 13 4999906 0507683 8 MIL-C-60872A 4.5.1.2 Lot size. Unless otherwise specified (see 6.2), the production lot siz
31、e shall be not more than e 1200. 4.5.2 Examination and tests. The quality conformance sample shall be subjected to the examinations of 4.6 and all the test procedures of 4.7 except for 4.7.7. 4.6 Examination. All cartridges and components shall be examined visually and radiographically and character
32、istics defined in accordance with the applicable drawings. One hundred percent examination shall be performed for all critical defects. Examination for major or minor defects shall be performed on a defect basis in accordance with the classification of defects. Four power (4X) magnification may be u
33、sed in performing visual examination for such defects as burrs and foreign matter. When compliance is in doubt as a result of visual inspection, the characteristic shall be measured or gaged to determine acceptability. All nonconforming items shall be rejected. 4.6.1 Cartridge, Delay, M271 Assembly,
34、 Drawing 10551590. Characteristic Defect Method of Inspection Critical 1 2 3 4 5 e6 Major 101 102 103 104 105 106 1 07 108 Minor 20 1 202 203 Any part missing Improper assembly Mixed delay elements or propellant Metal defective Crimp missing or incorrect Marking missing, incorrect, or illegible X-ra
35、yNisual X-ray Nisual Visual Visual Visual Visual Cartridge profile failure Diameter of body, max Diameter of head, max Location of datum diameter “O“ ring split, cracked or cut Protective finish inadequate or defective Foreign matter present Burr Gage Gage Gage Gage Visual Visual Visual Visual Total
36、 length, max Case damaged Varnish inadequate or missing Gage Visud Visual 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-bO72A 13 9999906 0507684 T MIL-C-60872A 4.6.2 Delay Element, M69, Drawing 10551589, covering a detail of Drawing 1055159
37、0. Critical 1 Mixed delay elements 2 3 4 5 6 Metal defective Flash hole missing or obstructed Primer uncrimped or seal missing Marking missing, incorrect, or illegible Delay charge not visible through flash hole Major 101 102 Burr 103 Foreign matter present Protective finish inadequate or defective
38、Visual Visual Visual Visual Visual Visual Visual Visual Visual Minor None defined 4.6.3 Case, Cartridge, Drawing 10519996, covering a detail of Drawing 10551590, Critical 1 Metal defective Major 101 102 103 104 105 106 107 108 109 Concentricity of head with body Straightness of base Diameter of body
39、, min Diameter of head, min Thickness of base flat Thickness of wall Protective finish inadequate or defective Burr or sharp corner Foreign matter present Minor 201 Diameter of head, max 202 Hardness 203 Total length 204 205 Surface finish improper Radius or chamfer missing or incorrect 8 Visual Gag
40、e Gage Gage Gage Gage Gage Visual Visual Visual Gage Gage Gage Visual Visual c Q Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-bO72A 13 999990b 0507685 1 MIL-C-60872A 4.6.4 Ring, Retaining, Drawing 8597235, covering a detail of Drawing 105515
41、90. Critical None defined Major 101 102 103 104 105 106 107 108 Concentricity of inside diameter with outside diameter Diameter, inside, max Diameter, outside, min Thickness Metal defective Protective finish inadequate or defective Burr Foreign matter Minor 20 1 Diameter, inside, min 202 Diameter, o
42、utside, max 203 Surface finish improper 4.6.5 Box, Fiberboard (Inner) Packing, Ammunition, Drawing 8864168. Critical None defined Major None defined Minor 20 1 Contents loose 202 Separator or filler missing 203 204 205 Heat sealer incomplete, loose, or distorted Cut or damaged through impregnated bo
43、x Marking missing, incorrect, or illegible 4.6.6 Box, Packing, Ammunition, Drawing 9214156. Critical None defined Major None defined Minor 20 1 Contents loose 202 Strapping missing, loose, broken, or improperly assembled Gage Gage Gage Gage Visual Visual Visual Visual Gage Gage Visual ManuaWisual Vi
44、sual Visual Visual Visual ManualNisual Visual 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-60872A 13 9999906 0507686 3 MIL-C-60872A 203 Contents of box exposed 204 Box damaged 205 206 Number of cartons incorrect Marking missing, incorrect,
45、 or illegible 4.6.7 Box, Fiberboard (Outer), Alternative, Packing, Drawing 8864169. Critical None defined Major None defined Minor 201 Contents loose 202 Box broken or damaged 203 204 205 Tape incomplete Number of units contained incorrect Marking missing, incorrect, or illegible Visual Visual Visua
46、l Visual Manual Visual Visuai Visual Visual 4.7 Test methods and procedures. 4.7.1 Primer x-ray. Prior to assembly into the cartridge, the primer shall be radiographically examined in accordance with MIL-STD-453. Each primer shall be x-rayed on boards or trays with the cup side perpendicular to the
47、rays, The x-ray negatives shall be identified by item nomenclature and by lot number. Primers are to be left mounted to the boards or trays until after the x-rays have been reviewed and defects identified to facilitate removal of defective units. After screening, the x-ray negatives with defectives
48、identified, shall be forwarded to the engineering activity designated by the acquiring activity. Interpretation of the radiographic films shall verify the following: Presence of Primer Charge No Material Defects 4.7.2 Hardness. Ten units from each heat-treated lot of components shall be tested with
49、hardness tester, Failure of a unit to comply with the requirements of the drawings shall be cause for rejection of the lot of components. 4.7.3 Protective finish. Unless otherwise specified (see 6.2), sampling plans and procedures in the determination of acceptability of coated parts shall be in accordance with the provisions set forth in MIL-A-8625. 4.7.4 Radiographic examination. All assembled cartridges shall be radi
