1、MIL-P-12951F (MU) 9 August 1972 SUPERSEDING 9 October i969 MIL-P-12951E (MU) MILITARY SPECIPICATION PRIMER, PERCUSSION, N39A1 PARTS FOR, AND LOADIIJG, ASSEilLING AND PACKING 1. SCOPE 1.1 This specification covers the inspection of the parts and the loading, assembling and packing of one type of perc
2、ussion primer designated as Primer, Percussion N39A1 2. APPLICABLE DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation for bids, or request for proposals, form a part of this specification to the extent specified herein. SPECIFICATIONS MILITARY NIL-A-2550 - Ammunition
3、and Special Weapons; General Specification for NILITARY NIL-STD-105 - Sampling Procedures and Tables for MIL-STD-109 - Quality Assurance Terms and Definitions MIL-STD-1168- Lot Numbering of Amunit ion MIL-STD-1235- Single and Blultilevel Continuous Inspection by Attributes (ABC-STD-105) Sampling Pro
4、cedures and Tables for Inspection by Attributes Licensed by Information Handling ServicesMIL-P-129 51F (MU) DRAWINGS U.S. ARMY MUNITIONS COMMAND 8797919 - Primer, Percussion, M39A1 Assembly 8864583 - Container, Ammunition, Plastic for 8864584 - Box, Wire Bound, Packing, Ammunition 9207697 - Carton,
5、Packing, Ammunition, for Percussion Primer, M39A1 for Percussion Primer M39A1 Percussion Primer, M39A1 Level C Packing PUBLICATIONS U.S. ARMY MUNITIONS COMMAND ET-87 989 19- Equipment Tabulation (Copies of specifications, standards, drawings and publications required by suppliers in connection with
6、specific procurement functions should be obtainea from the procuring activity or as dgrected by the contracting officer). 3. REQUIREMENTS 3.1 Material.-r Bterial and parts shall be in accordance 3.2 with applicable drawings and specifications. specified on Drawing (dwg.) 8798919, and with all requir
7、ements specified in applicable specifications. moisture content at the loading station at the time of loading the primer shall not exceed 0.30 percent when determined as specified in 4.4.1. 3.4 Functioning.-The primer assembly shall not show evidence of a firing failure (see 6.5) when tested as foll
8、ows: Frimers .-The primers shall cornply with all requirements 3.3 Moisture content of primer mixture composition.-The 2 ._, - .i ,. i I f 3 i Licensed by Information Handling ServicesflIL-P-1275lF 13 779770b 0274737 T MIL-P-12951F (MU) 3.4.1 Sensitivity.-The primer assembly shall fire without any e
9、vidence of failure when a maximum (max.) of twenty-nine and forty hundredths (29.40) inch ounces (see 6.6) of energy.is applied and shall not fire when a minimum (min.) of three and eighty-four hundredths (3.84) inch ounces of energy is applied. The test shall be performed as specified in 4.4.2.1. 3
10、.4.2 Failure to fire (Dud).-The primer assembly shall not fail to fire when tested as specified in 4.4.2.2. 3.5 Workmanship.-All parts and assemblies shall be fabricated and loaded in a thorough, workmanlike manner. They shall be free of burrs, chips, sharp edges, c.racks, surface defects, dirt, gre
11、ase, rust, corrosion products and other foreign matter. The cleaning method used shall not be injurious to any part nor shall the parts be contaminated by the cleaning agent. All required markings shall be neat and sharply defined. All packing components shall be dry. 3.6 First article inspection.-T
12、his specification makes provision for first article inspection. Requirements for the submission of first article samples shall be as specified in the contract . 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspectSon.-Unless otherwise specified in the contract or purchase order, the suppli
13、er is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by t
14、he Government. The Government reserves the right to perform any of the inspectZon set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. Reference shall be made to MIL-STD-109 to define terms used herein. The pro
15、visions of MIL-A-2550 shall apply. o items deliverable under the contract is submitted to the Government for acceptance, the contractor shall supply the following information accompanied by a certificate which attests that the information provided is correct and applicable to the product being submi
16、tted: 4.1.1 Submission of product.-At the time each completed lot 3 Licensed by Information Handling ServicesMIL-P-12951F (MU) a. A statement that the lot conplies with all of the quality assurance provisions specified in this specification. b. Drawing an specification number and date, together with
17、 identification and date of changes thereto. C. A stateinent that all material purchased by .the contractor meets requirements, when such material is controlled by Governrnent or comercial specifications referenced in any of the contractual documents, and that certificates of conformance are on file
18、 and available for review, except that a statement of findings on the moisture content of primer mixture composition shall be furnished with each lot submitted for acceptance . d. Number of items in the lot. e. Date submitted. The cePtificate shall be signed by a responsible agent of the certifying
19、organization. The initial certificate submitted sh 11 be substantiated by evidence of the agents authority to bind his principal. be required with subsequent certificates unless, during the course of the contract, this authority is vested in another agent of the certifying organization. Substantiati
20、on of the agents authority will not 4.2 First article inspection 4.2.1 Submission.-The contractor shall submit a first article sample as designated by the contracting officer for evaluation in accordance with the provisions of 4.2.2. The first ar-ticle sample shall consist of twenty-five (25) each o
21、f anvils, cups, and bodies which have been produced by the contractor or furnished by a supplier and which have been manufactured using the same production processes, procedures and equipment which will be used in fulfilling the contract. All parts and materials, shall be obtained from the same sour
22、ce of supply as will be used in regular production. Prior to submission, the contractor shall inspect the sample to the degree necessary to assure that it conforms to the requirements of the contract and he shall submit a record of this inspection with the sample, including certificates of conforman
23、ce of materi-als. A sample containing known defects shall not be submitted unless specifically authorized by the contracting officer. A first article sample, or portion thereof, as directed by the contracting officer shall also be submitted whenever there is a lapse in production for a period in exc
24、ess of 90 days, or whenever a change occurs in manufacturing process, material used, drawing or specification such as to significantly affect product uniformity as determined by the Government. 4- Licensed by Information Handling ServicesNIL-P-129 51F 4.2.2 Inspections to be performed.-Components wi
25、ll be subjected by the Government to any or all of the applicable examinations and tests specified ln 4.3.2 and 4.3.3 of this specification and any or a11 requtrements of the applicable drawings. Rejection.-If any component fails to comply with any of the applicable requirements, the first article s
26、ample shall be rejected. terminate its inspection upon any failure of an item to comply with any of the stated requirements. 4.2.3 The Government reserves the right to 4.3 Inspection provisions 4.3.1 Lot formation.-The term “inspection lot“ as used in this specification is definecl as an essentially
27、 homogeneous collection of units of product from which a representative sample is drawn and inspected to determine conformance with applicable requirements. only that quantity of units from which the sample was drawn and shall not be construed to represent any prior or subsequent quantities presente
28、d for inspection. considered to exist provided the inspection lot has been produced by one manufacturer in one unchanged process, in accordance with the same drawing, same drawing revision, same specification andsame specbfication revision and complies with the provisions for submission of product a
29、s specified in MIL-STD-105. 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. submitted for inspection in accordance with this specif
30、ication shall comply with the homogeneity criteria 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 with MIL-STD-1168. Each inspection lot of loaded primer assemblies sh
31、all contain: The sample selected shall represent Homogeneity shall be All material a. Like parts from not more than one supplier. b. Primer mixture composition from not more than one batch or blend of batches which results in homogeneity of all primer mixture used in loading a lot. 5 -. . Licensed b
32、y Information Handling ServicesMIL-P-12951F (MU) 4.3.2 ExaInination.-The examinations listed in the following subparagraphs shall be performed on inspection lots (see 4.3.1) of the components or assemblies designated ip the applicable paragraph heauings. (and major defects, when so specified) shall
33、be 100 percent. Sampling plans for major anii minor defects shall be in accordance with MIL-STD-105 except that continuous sampling plans in accordance with MIL-STD-1235 may be used if approved by the Government. Instead of applying the ACaLs esignated herein to the groups of major and minor defects
34、 listed, the contractor may elect to apply AQLs to individual defects using an AQL of 0.40 percent for each major defect and an AQL of 0.65 percent for each minor defect, When this method is elected, it shall be applied to all of the major and minor defects listed in the applicable subparagraph of t
35、his section, except where 100 percent inspection is specified, and Ise documented as part of the contractors inspection systen. Equipment necessary for the perfornance of the inspections listed shall be in accordance with li.3.il. Inspection for critical defects 4.3.2.1 Body (see dwg. 8798921 coveri
36、ng a deta51 of 8798919 1 dwg . Categories Defects Method of Inspection Code No. (see 6.2) Critical: None defined. Ma j or : AQL 0.65 percent 101. Insiae diameter., . .Gage 102. Outside diameter, maxirnum (ma . open end.,Gage 201. Total length, maxGage 202. Thickness through bottom, max.,Gage 203. Ra
37、dius incorrect or rnissingVisual 204. Finish improperVisual 205. Marking missing or incorrect.,.Visual 206. Evidence of poor workmanship, (see 3.5)Visua Minor: AQL 4.00 percent 6 O1001 01002 01003 01004 01005 O1006 01007 01008 Licensed by Information Handling ServicesMIL-P-12951F (MU) 4.3.2.2 Cup (s
38、ee dwg. 8798922 covering a detail of dwg. 8798919) Categories Defects Method of Code No, Inspection Critical : Major ; AQL 0.65 percent 1. Crack or splits Visual 02001 101, Outside diameter, max Gage 02002 102. Thickness through bottom, max. .Gage 02003 103. Total length. workman ship, gage 02004 10
39、4. Shellac missing or incompleteVisual 02005 Minor : AQL 1.00 percent 201. Inside diameter .-Gage 202 . Evidence of poor workmanship, (see 3.5). . Visuai 4.3.2.3 Anvil (see dwg. 8738920 covering a detail of dwg. 8798919) . Categories Defects Method of Inspect ion Critical: None defined Ma j or : AQL
40、 0.65 percent 101. Distance from rear to shoulder . Gage 102. Total length . Gage 103. Striker radlus . Gage Minor : AQL 2.50 percent 201. Width under shoulders, max.Gage 202. Total width, max.e.Gage 204, 205 . 203. Thickness *Gage Radii missing at year endVicual Evidence of poor workmanship, (see 3
41、.5) Visual 02006 02007 Code No. 03001 03002 03003 03004 03005 03007 03008 03006 7 Licensed by Information Handling ServicesMIL-P-12951F (MU) 4.3.2.4 Primer assembly, prior to assembly of anvil (see dwg. 8798919) Categories Defects Method of Inspection Critical: None defined. Maj or: AQL 0.65 percent
42、 101. Charge missinG.Visual 102. Excessive number of discsVisual 103. Foreign matter in cupVisual 104, Disc missin . Visual 201. Disc damaged or improperly 202, Evidence of poor workmanship, Minor: AQL 1.00 percent inserted.Visual (see 3.)visua1 4.3.2.5 Primer assembly (see dwg. 8798919) Cat egories
43、 Defects Method of Inspect ion Critical: None defined. Major: 101. 102 . 103. 104 . lo5 i06 . 107 AQL 1.00 percent Outside diameter, maxGage Total length, max.Gage Anvil missing, inverted or loose.Visual Body cracked, dented or distortedVisual Cocked anvil.Visual Vent hole missin,.Vlsual Hole- diame
44、ter, minimum (min. ) . .Gage Minor: AQL 1.50 percent 201, Thickness through flange, max,.Gage 202. Diameter of flange, max.,Gage 203. Crimp incomplete.,.,Visual 204. Marking missing or incorrect,Visual 205. Evidence of poor workmanship, (see 3.5) Visual 8 Code No. 04001 04002 04003 04004 04005 04006
45、 Code No. 05001 05002 05003 05004 05005 05007 05006 05008 05009 05010 0501.1 05012 Licensed by Information Handling ServicesbIIL-P-12951F (MU) 4.3.2.6 Container or set-up box, prior to sealing (see dtvg. 8864583 or 9207697) Categories Defects Critical : None defined e Method of Code No. Inspect ion
46、Major: AQE 0.40 percent 101. Tray missing OP damaged. ,Visual 06001 102. Primer misslng Visual- 06002 201. Packing component mfssing Visual 06003 (see 3.5).0. . Visual 06004 . Winor : ABE 1,OO percent 202. Evidence of poor workmanship, 4.3.2.7 Sealed plastic container, set-up box and carton (see dwg
47、. 8864583 and 9207697). Categories Defects Method of Code No. Inspect ion Critical: None defined. Ma j or : AQL 0.40 percent 101. Sealing tape fncomplete or O7 001 102. Container cut, punctured or torn.Visual 07002 201 . Marking missing, incorrect or 202. Evidence of poor workmanship, badly wrinkled
48、eVisual Ciinor : AQE 1.00 percent . illegibleo Visual 07003 (see 3.5). .Visuai 07004 9 Licensed by Information Handling ServicesNIL-P-12951P (MU) 4.3.2.8 Packing box (see dwg. 8864584). Cat e gor ie s Defects Critical : None defined . Method of Code No. Inspect ion Major: AQL 0.40 percent 101. Board
49、 broken or split Visual 08001 102. Hardware or wire missing, 08002 broken or loose. . Visual Minor : AQL 1.50 percent 201. Hardware or wire improperly 202. Metallic seal missing, unsealed 203. Marking missing, incorrect or engaged or mislocatedVisual 08003 or improperly positioned .Visual 08004 illegible. .Visual 08005 4.3.3 Testing 4*?.3.1 3.3) - Major defect - Code No. 09001.-The contractor shall provide adequate controls to insure compliance with the requirements and shall test for verification one sample of the primer mixture composition from each eight hours productio
