1、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-50252 13 M 9799906 0325874 3 M MIL-C-50252 (MU) DRAWINGS ARMY 8862347 - am348 - 9241622 - 9241623 - Box, Packing, Ammunition, for 105MM Howitzer Ammunition in Fiber Container M472. Container, Ammu
2、nition Fiber M472 for 105MIuI Howitzer Ammunition Projectile, 105MM: Anti-Personnel, XM380E6 Loading Assembly Cartridge, Semi-Fixed, lO5MM Anti-Personnel XM546E2 for Howitzer Cannon M2A2, M103, Mi37 Assembly PUBLICATIONS ARMY ET-9241623 - Equipment Tabulation (Copies of specifications, standards, dr
3、awings and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer). 3. REQUIREMENTS 3.1 3.2 Material.-Materials and parts shall be in accordance with applicable drawings and speci
4、fications. Cartridges.-The cartridges shall comply with all require- ments specified on Drawing (dwg.) 9241623 and with all requirements specified in applicable specifications. of flash holes as specified on the appropriate primer drawing. 3.3 PrimerocThe primer shall have the required number and lo
5、cation 3.4 in 4.3.2, 3.4.1 Cartridge functioning.-The cartridges shall.function satisfactorily as evidenced by first and second projectile function. 3.4.1.1 Time-to-burst,-When set for 5.0 seconds, first projectile function shall occur after 4,7 seconds and prior to 5.6 seconds. Proving ground.-Test
6、ing shall be accomplished as specified 3.4.1.2 Muzzle action.-When set for Muzzle Action (MA), first projectile function shall occur prior to 5 meters from the muzzle and second projectile function shall occur prior to 55 meters from the point of first function. 2 Provided by IHSNot for ResaleNo rep
7、roduction or networking permitted without license from IHS-,-,-3.4.3 Indicator function.-The tracer shall exhibit a The dye charge shall exhibit a satisfactory function by satisfactory function by emitting a visually observable incendiary flame. producing a visually observable puff of smoke indicati
8、ve of first function . of set time when set for 5.0 seconds (i.e. 3.75 seconds). or metal parts separation in the gun bore, the muzzle brake, or in flight, prior to fuze function. 3.4.4 3.4.5 Early burst,-The round shall not function before 75 percent Security of parts.-There shall be no loss of com
9、ponents % - 3.5 Workmanship 3.5.1 in a thorough, workmanlike manner. All parts shall be free of chips, cracks, dirt, grease, rust and other foreign material. The cleaning method shall not be injurious to any of the parts nor All parts and assembiies shall be fabricated and finished shall the parts b
10、e contaminated by the cleaning agents. -_- _-_ 3.5.3 Rotating bands.-Care shall be exercised at all times so that the rotating band of the projectile is not nicked, burred or - otherwise damaged, 3.5.4 Adhesive on threads.-Threads shall be clean and free . of contaminants prior to the application of
11、 the specified quantity.- of adhesive (see 4.2.3.5). k 4. QUALITY-ASSURANCE PROVISIONS % 4.1 General quality assurance provisions. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted
12、without license from IHS-,-,-MIL-C-50252 13 779770b 0325877 7 m MIL-C-50252 (MU) Changes to the process, specification, or drawing not affecting safety, performance, interchangeability, or storage, as determined by the Government, shall not be deemed to alter the homogeneity of an inspection lot. Al
13、l material submitted for inspection in accordance with this specification shall comply with the homogeneity critiera specified herein, regardless of the type of sampling procedure which is being applied to determine conformance with requirements. Lot numbering, as required, shall be in accordance wi
14、th MIL-STD-1168. Each inspection lot of loaded cartridges shall contain: a, Cartridge cases of one type of metal from one manufacturer in accordance with the same drawing and drawing revision, same specification and specification revision. b. Propelling charges from not more than one lot. C. Loaded
15、primers of one lot interfix number from one manufacturer . d. Projectiles of one lot interfix number from one manufacturer. e. Loaded relays of one lot interfix number from one manufacturer . f, Loaded detonators of one interfix number from one manufacturer. g. Tracers of one lot interfix number fro
16、m one manufacturer. h, Fuzes of one interfix number from one manufacturer. i. Smoke marker pellets of one interfix number from one . i manufacturer. b I 4.2.2 Examination.-The examinations listed ln the following subparagraphs shall be performed on inspection lots (see 4.2.1) pf the components or as
17、semblies designated in the applicable paragraph headings. Inspection for critical defects (and major defects, when so specified) shall be 100 percent. minor defects shall be in accordance with MIL-STD-LOS, except that continuous sampling plans in accordance with MIL-STD-1235 may beuse if approved by
18、 the Government. designated herein to the groups of major and minor defects listed. Sampling plans for major and Instead of applying the AQL*s an AQL of 0.40 percent for each major defect and an AQL of 0.61; percent for each minor defect. When this method is elected, it shall be applied to all of th
19、e major and minor defects listed in. the applicable subparagraph of this section, except where 100 percent inspection is specified, and be documented as part of the contractors inspection system. Equipment necessary for the per- formance of the inspections listed shall be in accordance with 4.2.4. 5
20、 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-= 4.2.2.1 Relay and detonator assembly (see dwg. 9230474 covering a detail of dwg. 9241622). Method of Code No, Inspection (see 6.2) Categories Defects Critical: None defined. Major : LOO Percent Ins
21、pection 101. Detonator or relay improperly assembled or missing Visual O1001 102. Contents loose., ,Visual 01002 201. Evidence of poor workmanship, I . Major : AQL 0.40 percent AQL 0.65 percent Minor : (see 3.5). .Visual 01003 4.2.2.2 Fuze adapter and smoke marker loading assembly (see to outside fa
22、ceGage 02002 202. Total length.,. Gage 02003 203. Evidence of oor workmanshin. I . 4.2.2.3 Base charge assembly (see dwg. 9211477 covering a 5 detail of dwg. 9241622). I Categories Defects Critical: None defined. I Method of Code No, Inspection Maj or : AQL 0.40 percent 101. Weight of propellant ,Sc
23、ale 03001 102. Bag torn or heat seal open,Visual O3002 201. Evidence of noor workmanshin. 4- Minor: AQL 0.65 percent I . .- r Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-50252 (MU) 4.2.2.4 Projectile and fuze adapter loading assembly prior
24、to assembling (see dwg. 9241622). Categories Defects Method of Code No. Inspection Critical: None defined. Ma j or : 100 Percent Inspection 101. Relay and detonator housing 102. Radial detonator missing 103. Adhesive on threads inadequate assembly missing.Visuai 04001 or improperly assembled Visual
25、04002 (see 3.5.4 and 4.2.3.5). . Visual 04003 Minor: None defined. 4.2.2.5 Projectile after loading base charge cavity (see dwg. 9241622) . Categories Defects Method of Code No. Inspection Critical: None defined. Ma j or : 100 Percent Inspection 101. Base charge loading assembly missing (prior to co
26、vering),visua 05001 102. Propellant cover missing. .Visual 05002 Major: AQL 0.40 percent Minor: None defined. 4,2,2.6 Projectile prior to assembling (see dwg. 9241622). Categories Defects Method of Code No. Inspection Critical: None defined. Major: 100 Percent Inspection 101. Adhesive on threads ina
27、dequate (3 places) (see 3.5.4 and 4.2.3.5),Visual 06001 Major: AQL 0.40 percent 102. Tracer missing or inverted (prior to assembling plug and disc assembly)3Visual 06002 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-50252 13 I 7777906 0325880
28、 7 H MIL-C-50252 (MU) Minor : AQL 1.50 percent I 201. Marking missing, misleading or unidentifiable,Visual 06003 202. Protective coating with total damaged area in excess of 1/11 square inchVisual 06004 203 . Evidence of poor workmanship, (see 3.5),.*. . .visual 06005 .4.2.2.7 Loaded primer, prior t
29、o assembly to cartridge case (see dwg. 8866664 covering a detail of dwg. 9241623). Categories Defects Method of Code No. Inspection . Critical: 1. Any flash hole missing.Visual 07001 Maj or : None def Ined . Minor: None defined. 4.2.2.8 Cartridge case prior to assenbling propelling charge (see dwg.
30、9241623). Categories Defects ikthod of Code No. Inspection Cri ti cal : Major: None defined. 1, Primer above flush .Gage O8001 -Minor: None defined, 4.2.2.9 Cartridge (see dwg. 9241623). i C at e gor i s Defects Method of Code No. Inspect ion ;Critical: None define, 8 Major: None defined. Minor: AQL
31、 1.00 peicent 201. Marking missing, misleading OP 202. Evidence of poor workraanship, unidentifiable.Visual 09001 (see 3.5) . . .Visua 09002 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking pe
32、rmitted without license from IHS-,-,-MIL-C-50252 4.2-.2.12 Sealed wood packing box (mee dwg. 8862347), Categories Defects Method of Inspect ion Critical: None defined. -Major: AQL 0.65 percent 101. Protective bag missing (prior to closing) . .Visual 102. Box damaged exposing contentsVisual 103, Hard
33、ware or strapping missing, broken or loose.Visuai 104. DOD symbol missing or incorrect. .Visual Minor : AQL 1.50 percent 201, Strapping or hardware improperly assembled.,Visual/ 202. Handle missing or insecure.Visual/ 203. Car seal missing, unseale or 204, Marking missing, misleading or Manual Manua
34、l improperly positioned,Visual unidentifiable,.,Visual 4.2.3 Testing Code No. 12001 12002 12003 12004 12005 12006 12007 12008 4,2.3,1 Bourrelet Diameter (see dwg, 9241622) - Major defect - code No. 06003.-The projectile loading assembly shall be gaged 100 percent for maximum diameter forward and rea
35、rward of the rotating band, requirqment shall be classed defective and removed from the lot, Inspection equipment shall be in accordance with 4.2.4. Any projectile which fails to corflply with the applicable 4.2.3,2 Torque (see dwg. 9241622). -. Projectile Base Fuze adapter Fuze Plug and disc assemb
36、ly Major Ma j or Ma j or Pa j or 06004 06006 06005 06007 After the cement has dried, twenty projectiles shall be randomly selected from each lot for this test. withstand the torque when tested in accordance with 4.3.1, the lot shall be rejected. If any projectile fails to 10 Provided by IHSNot for R
37、esaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-C-50252 (MU) 42.3.3 Check test for possible deterioration (see applicable ?primer and detonator loading specifications) - Major defect - Code No. l3OOl.-If the total elapsed time between the original acceptance of any pr
38、imer or detonator lot and the assembly of that lot into cartridges exceeds two years, or if the primer or detonator have been subject to adverse conditions, however brief, at any time since previous tests, the applicable lot shall be subjected to, and must satisfactorily pass the check test for dete
39、rioration specified in the applicable loading specification immediately before the primers or detonators are assembled into the cartridges. The test shall be performed by the contractor on assemblies selected by the Government inspector at the facility assembling the complete cartridges (see 6.4). 4
40、.2.3.4 Mouth diameter and maximum profile of the cartridge case (see applicable cartridge case drawing) - Majolh defect - Code No, 13002,-The cartridge cases shall be gaged 100 percent for profile the applicable requirements shall be classed defective and removed from the lot. Inspection equipment s
41、hall be in accordance with 4.2.4. (NOTE: This inspection shall not be required if it is determined that the cartridge cases have been previously gaged 100 percent for these characterisitcs. of the manufacturing application method shall be quantitatively assessed on one sample for each threaded joint
42、 at the start of L each production shift, as well as each time there is a change in the method or process that is likely to affect uniformity of performance drawing requirement, production shall be stopped and the application method corrected. When it has been determined that the auantity amlied . 1
43、 * and diameter of the mouth. Any case which fails to comply with I 4.2.3.5 Adhesive on threads (see dwg. 9241622),-The adequacy as determined by the Government. If the sample fails to meet the I observation shall be used to assure that this amount is applieh to each projectile assembly (see 4.2.2.4
44、 and 4.2.2.6). I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-50252 13 W 777770b 0325884 b W - _ MIL-C-50252 (MU) 4.2.3.6 Proving Ground (see 3.4).-Defects shall be classified in accordance with the following table: The tests shall be perfor
45、med as specified in 4.3.2. Categories Defects Critical Maj or Maj or Maj or Major Maj or Ma j or Ma j or Ma j or Break-up prior to clearing gun bore or muzzle brake Detonation of the round prior to 3.75 seconds when set for 5.0 seconds Cartridge fails to function satis- factorily when set for 5.0 se
46、conds as evidenced by first proJectiie function at or prior to 4.7 seconds or at or after 5.6 seconds Cartridge fails to function satis- factorily when set for MA as evi- denced by first projectile function at or after 5 meters Cartridge fails to function satis- . factorily when set for MA as evi- d
47、enced by second projectile function at or after 55 meters from first function Muzzle velocity exceeds i830 fps or is less than 1770 fps Standard deviation of muzzle velocity exceeds 8.0 fps Tracer fails to emit a visually observable incendiary flame Dye charge fails to produce a visually observable
48、puff of smoke indicative of first function Code No. 14001 14002 14003 14004 14005 14006 14007 14008 14009 4.2.3*6.1 4.2.3.6.1.1 Time-to-burst (see 3.4.1.1) - Code No. 14003 Beginning with the first lot produced and continuing until three consecutive lots have complied with all the requirements of 3.
49、4.1.1, 3.4.3 and 3.4,4, 25 sample cartridges shall be randomly selected from each lot for this test. The sampling plan and procedures for this test shall be in accordance with Standard MIL-STD-414, Secton B, Part II, Table B-3, Code Letter I, and an AQL of 2.5 percent. addition, if three or more malfunctions (i.c. uds, un
