1、MIL-C-18171 (AR) AMENDMENT 7 20 May 1990 SUPERSEDING AMENDMENT 6 05 July 1988 MILITARY SPECIFICKION CARTRIDGE, 81MMM, HE, M374A3 LOADING, .ASSEMBLING AND PACKING This amendment forms a part of Military Specification MIL-C-48171 (PA), dated 14 January 1975, and is approved for use by the U.S. Army Ar
2、mament, %nitions and Chemical Command, and is available for use by all Departnients and Agencies of the Department of Defense. PAGE 1 2.1, To the list of Military Specifications, add the following: 1WL-C-48156 - Cartridge, Ignition, M299, Loading, Asseriibling and Packing“. Following line 21: Add 11
3、9312548 - Cartridge, 81bll4, HE, W74A3 W/O Fuze“. Line 22: Drawing 1f92412911t delete W/Fuze, P, M524A6l and substitute W/Fuze, PD, M56711. Line 24: Delete 19230175 - Container .,. in Jungle Wrap“ and substitute 1t9276596 - Container Amnunition, Fiber, M252A5 for 81MM Mortar Ammunitiont1 . At bottom
4、 of page: Add 9287603 - Packing and Marking for Container, Fiber, M252A5, Anmo for 81MM Amno in Jungle Wrap“. PAGE 2 # 2.1, Add under Inspection Equipment Drawings as follows: 9280418 - Fin Distortion Gagetf. 3.2, Line 2: Add Ifor 9312648, whichever is applicable.1t PAGE 3 3.5.2, Delete ltninctionTf
5、 and substitute Vunction high order“. AMC;C N/A 1 of 7 FSC 1315 DISTRIBUTION STATEMENT A, Approved for public release; distribution is unlinited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-48171 (7) L3 797770b 0438747 b YIL-C-48171 (AR) AM
6、ENDMENT 7 PAGE 5 4.2.2, Line 4: Delete Yhspection for Critical Defects (and Major Defects, when so specified)“ and substitute ttInspection for Critical Defects and Special Defects (and Major Defects, when so specifiedOt1 Line 12: Examination, insert the following before the last sentence of the para
7、graph: “The contractor may elect to perform 100% inspection with automated equipcnent or impose mndatory process controls on automated operations in lieu of conducting sampling inspection for defects listed in this specification. in such cases, calibration plans shall be submitted to the Technical A
8、gency (see 6.8) for approval for each automatic inspection station and process control plans must be submitted for approval for each of the automated operations, The plans shall identify; (1 ) the frequency (production interval) for validating equipment functioning, description of niaterial control
9、procedures to be imposed on product passing through each automated station during the production interval between validations. Under these provisions final acceptance will be withheld from material produced during a production interval until satisfactory validation of each of the automated stations
10、so controlled. in the event of a validation failure of any station, the material processed through such station since the last acceptable validation shall be placed in a rejected status pending correct ive act ion . (2) the defect standards and (3) a PAGE 6 4.2.2.1, Line 2: Delete 19241291 Ifc at en
11、d of line and add “9241291 or 931 2648. 4.2.2.2, Line 3: Delete 1t92412911f and add 9241291 or 9312648.0 4.2.2.2, Line 8: Delete lt101. Depth .*. mx . Gage CDtl add new catagory heading, major: 100 percent inspection 101. Depth of fuze well, mx . . . Gage CD.“ 4,2.2,3, Line 2: Delete tt92412911t and
12、 add It9241291 or 9312648.tt Line 6: Delete Writical 2. High explosive extends beyond top of liner . Visual“ in its entirety. 4.2.2.3.1, Add new paragraph as follows: t14.2.2.3.1 Charge, Propelling, M205 (see dwg. 92805881, Note a Critical 1. propellant shall escape . . . Visual Container or contain
13、er seal damaged to the extent that (see 4.3.4) Major 101. Container or container seal damage but not to the extent that propellant shall escape (100% inspection) . Visual (see 4.3.4) . Minor: None defined - 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from I
14、HS-,-,-Note a - If LAP of the propelling charge, M205, and the cartridge, M374A3, are performed at the same installation, this paragraph is not required.“ 4.2.2.4, Line 1: Delete in its entirety and add ?)4,2.2.4 Cartridge (see dwg. 9241291 or 9312648Irt Line 3: Delete Critical I. ignition cartridge
15、 head not fully seated . . . Visual“ and add Critical 1. Deptn of ignition cartridge from fin end below minimum . Gage CD“ PAGE 7 4.2.2.4, Line 1: from top of page: Delete line in its entirety and add “2. Visual-Manual “ Fuze safety wire missing or insecure (if applicable; see dwg. 9241291 ) Delete
16、critical 3 and add new critical 3 as follows: “3. shall escape (if applicable, see 4.3.4.1) . 100% . 3.2 . Visual (see 4.3,411 Line 5 from top of page; Cracks in fin housing . Visual (4 power mgnification)“ Following line 5 from top of page: missing or illegible - Visual (see 6.7)11 Propel1 ing char
17、ge missing or damaged to the extent that propellant * Delete line in its entirety and add tt6 . i Add: “Special a: Varning notice(s1 Line 10: Add new Major 105 as follows: Delete line 103. utside diameter, rnax . . . Gage CD“ * “105 Fin blade damaged or distorted . . . 100% inspection .3.2 .Gage (se
18、e drawing 9280418)rf Line Xi from top of page: Delete line in its entirety and add “108. Fuze fails to meet mimum assembly torque (if applicable; see dwg, 9241291 1. Test Line 24 from top of page; Delete line in its entirety and add “1 11 Fuze not fully seated (if applicable; see dwg. 9241291 . . .
19、Visual“ Add new 112 as follows: “112. Propelling charges damaged but not to the extent that propellant shall escape (if applicable, see 4.3.4.1) (100% inspection) 3.2 . Visual (see 4.3.4)“ Line 28 from top of page: Delete “Minor: 202. Pettman cement does not cover . Visual1 in its entirety and subst
20、itute “Minor: 202. Pettman cement (or alternate) improperly applied (applicable to the fze, fin and ignition cartridge) . . . Visual“ 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-48171 (AR) AFDENDtENT 7 Line 33 from top of page add “Minor
21、205 Closing plug not fully seated (if applicable; see dwg. 9312548) . Visualt1 4.2.3.5, Line 1: Delete “see dwg. 9230175“ and substitute “see dwg. 9287603“ Line 3: Delete “Critical: None defined“ and substitute Critical 1 and Special A. as follows: tl. Propelling charge damaged to the extent that pr
22、opellant shall escape 25(a) . Visual (see 4.3.4) Special A. Propelling charge support missing Visual“ Yajor catagory, delete “None defined“ and substitute 101 as follows: tllOl. Propelling charge damaged but not to the extent that propellant shall escape 25(a) . . . Visual (see 4.3.4)“ Add note (a)
23、as follows: l(a) Twenty-five cartridges which have the support for the propelling charges assembled shall have the support removed and remove the four propelling charges. The propelling charges shall be inspected for damage (splits, cracks, tears) which may result from assbling/disassefflbling of ch
24、arges and support on fin boom. The inspection plan for major defects shall be 100-1-2“. PAGE 8 4,2,2,6, Line 1: Delete !see dwg. 9230175 and substitute “see dwg. 9287603“ 4.2.2.7, Line 1: Delete “see dwg. 9230175“ and substitute “see dwg. 9287603“ Following line 10: Add: V03. Kraft paper missing or
25、not properly assembled . . . Visual1 Add the following paragraph: 1i4,2.2,9 Liner (See dwg. 7549011). Catagories Defects Method of Inspect ion Major 100 percent inspection Gage 101 . Length, min. Major 102. Length, max. Gage 103. Outside diamter, min. Gage“ 4 Provided by IHSNot for ResaleNo reproduc
26、tion or networking permitted without license from IHS-,-,-MIL-C-48L71 (7) 23 m 997970b 0438752 b m MIL-C-45171 (AR) AMENDMENT 7 Add the following paragraph: ft4.2.2.10 Packing and Marking for Box, Wirebound Packing, Amunition for 81MM Mortar Amnunition in Jungle Wrap (see dwg. 9287601 . Method of In
27、spection Catagories Defects Minor 201. Car seal missing, unsealed or improperly positioned Vi sua1 It Add the following paragraph: 1f4.2.2.11 Support (see dwg 9369933 Catagories Defects Vethod of Inspect ion Major 101, Inside 1enB;th Gage 102. Rib radius Gage 103. Inner radius (small) Gage 104. Leng
28、th between open end Gage“ 4.2.3.1, Line 2: Delete l1XM299I and substitute “M299It PAGE 9 4.2.3.2: Delete entire paragraph and substitute “Cavitation (see 3.3 - except 3.3.4) Major Defect - The sampling plan and procedure for this test shall be in accordance with MIL-STD-1235 using an AQL of 0.65 per
29、cent, .by cartridge having cavitation in excess of that permitted by the applicable requirement for any segment shall be classified defective. “he test shall be performed as specified in 4.3.1 .If 4.2.3.4, sub-paragraph e: Delete “e. Metal parts separation, critical defect (see 3.5.5) .It and substi
30、tute, “e. Metal parts separation, special defect (see 3.5.5) .I PAGE 10 4.2.3.4.2, Line 2: klete tt4.2.3.3.1tt and add 1f4,2.3.4. 1“. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-48L7L (7) 13 m 779770b 0438753 8 m MIL-C-48171 (AR) AMMENDME
31、NT 7 PAGE 11 4.3.2, Line 5: Delete “one half of the sample cartridges shall be fired at charge one and the other half at charge nine,“ the saaple cartridges shall be fired at charge zero and the other half at charge four“. and add “One half of Line 8: recorded on the firing recordf1 and substitute Y
32、ihe individual velocities, presures (charge four only), deflections and ranges shall be recorded on the firing record“ . Delete “The individual velocities, pressures and ranges shall be * Line 10: Delete “In the event of a misfire, the ignition cartridge shall be removed and forwarded to Picatinny A
33、rsenal“ and substitute “In the event of a misfire, the ignition cartridge shall be removed and forwarded to ARDEC, ATTN: SMCAR-AEE-BP“. Line 31: Delete “.and prints of all the other rounds in that particular charge zone, shall be attached to the firing record.lt and add II. and prints of all the oth
34、er rounds in that particular charge zone, in that lot, shall be attached to the firing record.tf PAGE 12 4.3.4, Add new paragraph as follows: !4.3.4 Damaged propelling charge. To ascertain that a damaged propelling charge is to be classed as critical or major, the following procedure shall be used:
35、a. Place the damaged charge on a M24 fin, oriented such that the propellant would be resting against the damaged surface, b. The fin-charge shall be hand-shaken yigoraisly three times. C. Examination shall be made for propellant spillage - if any propellant is observed, the damaged propelling charge
36、 shall be classed as a critical defect if no propellant is observed, the damaged propelling charge shall be classed as a major defect. 4.3.4.1 Alternate assembly/inspection procedure. The contractor may elect to utilize the following assembly operations. a. Place the support for the propelling charg
37、e in a holding fixture. b. Properly place the four propelling charges in the support with gaps aligned upward. C. assembly (step b). Press the fin housing, into the propelling charges and support 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-YIL-
38、C-48 17 1 (AR 1 AMENDMENT 7 d. 100% visual inspection for damage to the ends of four propelling charges will be performed. e. Continue the assmbly/inspection operations (see 4.2.2.5) .l) 5.2: Delete this paragraph in its entirety and substitute “5.2 Packaging, packing and marking - Packaging, packin
39、g and marking shall be in accordance with wg. 9287603# 9287601 9276596ll. PAGE 13 6.2.2, Line 15: Delete lThe Contractor if referred to MIL-HDBK-204, l Inspect ion Equipment Design for guidance Line 17: Delete “five digit“ and substitute “paragraph and“. * 6.3, Line 6: Delete in its entirety and add
40、 “ATTN: AWMC-QAT-B(D), CMCAR-FSA-IM( D ) . “ PAGE 14 Add the following paragraph: “6.7 Special defect. A defect, other than Critical, that judgement and experience indicate may, depending upon the degree or variance from the design requirement: a. Result in hazardous or unsafe conditions for individ
41、uals using, maintaining or depending upon the product or b. Prevent performance of the tactical function of the major end item1! Add the following paragraph: 9 l1 6,8 Submission of calibration and process control plans, Prior to implementation of calibration or process control plans in accordance wi
42、th 4.2,2, plans shall be approved by ARDEC, ATTN: AMSMC-QAT-I(D), Picatinny Arsenal, New Jersey 7806-5000.1 The margins of this amendment are marked with an asterisk to indicate where changes (additions, modifications, corrections, deletions) from the previous amendment were made. This was done as a
43、 convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous amendment, Custodian: Army - AR 7 Preparing activity: . Army - AR (Project 1315-AC151 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
