1、i MIL-L-bO4Z7B 13 W 777970b O44007b 2 W I I MIL-L-60427B (MI) 16 Ausust 1990 SUPERSEDING MIL-L-60 427A (MI) 16 October 1972 MILITARY SPECIFICATION LOCKWIRE, FOR 2.75“ ROCKET MOTOR ALL MARKS AND MODS This specification is approved for use by the U.S. Army Missile Command, Department of the Army, and
2、 is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the quality assurance provisions and special requirements not covered by the drawings for lockwire used in 2.75 Inch Rocket Motor, all Marks and Mods. 2. APPLICABLE DOCUM
3、ENTS 2.1 Government documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department
4、 of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL QQ-P - 4 1 6 - Plating, Cadmium (Electrodeposited) Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in
5、improving this document should be addressed to: Commander, U.S. Army Missile Command, ATTN: AMSMI-RD-SE-TD- ST, Redstone Arsenal, AL 35898-5270 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A FSC 1340 DISTRIBUTION
6、 STATEMENT A. Approved for public release; distribution is unlimited. O Licensed by Information Handling ServicesI MIL-L-60427B 13 7777906 0440077 4 M - - - P i MIL-L-60 427B (MI) STANDARDS MILITARY MIL-STD-171 - Finishing of Metal and Wood Surfaces MIL-STD-1167 - Ammunition Data Card MIL-STD-1168 -
7、 Ammunition Lot Numbering MIL-STD-1169 - Packaging, Packing and Marking for Shipment of Inert Ammunition Components (Unless otherwise indicated, copies of the federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Robb
8、ins Ave., Philadelphia, PA 19111-5094.) 2.1.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. the issues are those cited in the solicitation. Unless otherwise spe
9、cified, DRAWINGS ARMY 457822 - Lockwire PUBLICATIONS ET-457822 - Equipment Tabulation (Copies of the drawings and publications required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.2 N
10、on-Government publications. The following documents form a part Unless otherwise specified, of this document to the extent specified herein. the issues of the documents which are DoD adopted are those listed in the issue of the DODISS cited in the solicitation. the issues of documents not listed in
11、the DODISS are the issues of the documents cited in the solicitation (see 6.2). Unless otherwise specified, AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM B 633 - Electrodeposited Coating of Zinc on Iron and Steel, Standard Specification for (Application for copies should be addressed to the
12、 American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. documents also may be available in or through libraries or other informatio
13、nal services. ) These 2 Licensed by Information Handling ServicesMIL-L-60427B (MI) 2.3 0rder.of precedence. In the event of a conflict between the text e o this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applica
14、ble laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First.article. When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.3) in accordance with 4,4. 3.2 Material. Materials and parts shall be in accordance with the requirement
15、s of applicable drawings and specifications. The metal parts shall be free from material defects, including all surface imperfections and all internal defects in the finished component. 3.2.1 Surface imperfections, Surface imperfections include pits, seams, laps, tears, cracks, scales, blisters, col
16、d shut$, and other similar defects. 3.2.2 Internal defects. Internal defects include laminations, segregations, internal cracks, inclusions and other similar defects. 3.3 Cadmium coating. Unless otherwise specified (see 6.2) the lockwire shall be cadmium coated and inspected for imperfections and de
17、fects (see 4.6.1). 3.4 Zinc coatinq. Unless otherwise specified (see 6.2) the lockwire shall be zinc coated and inspected for imperfections and defects (see 4.6.2). 3.5 Workmanship. All parts shall be fabricated and finished in a thorough, workmanlike manner. They shall be free of burrs, chips, shar
18、p . edges, cracks, unblended radii, surface defects, metal shavings, dirt, grease, rust, corrosion products and other foreign matter. The cleaning method used shall not be injurious to any part nor shall the parts be contaminated by the cleaning agent, All required markings shall be neat and sharply
19、 defined. Items with known defects shall not be submitted with the lot. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the contractor is responsible for the performance of all inspection requirements (examinations and
20、tests) as specified herein. Except as otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government reserves the right to
21、 perform any of the inspections set forth in this specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.1.1 Responsibility for compliance. All items shall meet all , requirements of sections 3 and 5. The inspection set forth i
22、n this specification shall become a part of the contractor$ overall inspection system or quality program. The absence of any inspection requirements in the 3 Licensed by Information Handling ServicesMIL-L-60427B (MI) specification shall not relieve the contractor of the responsibility of ensuring th
23、at all products or supplies submitted to the Government for acceptance comply with all requirements of the contract. as part of manufacturing operations, is an acceptable practice to ascertain conformance to requirements, however, this does not authorize submission of. known defective material, eith
24、er indicated or actual, nor does it commit the Government to accept defective material. Sampling. inspection, 4.2 Classification of inspections. The inspection requirehents specified herein are classified as follows: a. First article inspection (see 4.4). b. Quality conformance inspection (see 4.5)
25、 4.3 Inspection conditions. Unless otherwise specified, all inspections shall be performed in accordance with the test conditions specified in applicable test methods documents and paragraph 4.6 in this specification, . 4.4 First article inspection. The contractor shall submit a first article sampl
26、e as directed by the contracting officer (see 6.2) for examination and testing in accordance with the provisions of 4.5. article sample shall consist of 50 assemblies, 50 subassemblies and 50 complete sets of parts which have been produced by the contractor or furnished by a supplier, which have bee
27、n manufactured using the same production processes, procedures and equipment as will be used in regular production. All parts and materials, including packaging and packing, shall be used in regular production. Prior to submission, the contractor shall inspect the sample to the degree necessary to a
28、ssure that it conforms to the requirements of the contract if specified in the contract or order, and submit a record of this inspection with the sample, including statements of findings/certificates of conformance for material (see 6.2). A first article, or portion thereof, as directed by the contr
29、acting officer, shall also be submitted whenever there is a lapse in production for a period greater than 90 days or whenever a change occurs in the manufacturing process, material used, drawings or specification that will significantly affect product uniformity as determined by the Government. The
30、first 4.5 Quality conformance inspection. Quality conformance inspections shall be as specified in table I. TABLE I. Quality conformance inspection. Requirement Test Inspection paragraph paragraph First article 3.1 4.4 Surface imperfections 3.2.1 4.5.4, 4.6.1, 4.6.2 Internal defects 3.2.2 4.5.4, 4.6
31、1, 4.62 Cadmium plating 3.3 4.6.1 Zinc plat-ing 3.4 4.6.2 Workmanship 3.5 4.5.4, 4.6 . 4 Licensed by Information Handling ServicesC “ O 4.5.1 g. In this specification a lot shall consist of an essentially homogeneous collection of units from which a representative sample is drawn. Homogeneity shall
32、 be considered to exist provided the lot has been produced by one manufacturer, in one unchanged process, in accordance with the same drawings, drawing revision, same specification and specification revision. Changes to the process, specification or drawing not affecting safety, performance, interch
33、angeability, or storage, as determined by the Government shall not alter the Homogeneity of the lot. unique lot number and conform to MIL-STD-1168. be as specified in the contract or order (see 6.2). e Each inspection lot shall bear a The inspection lot size shall Lot Size Sample Size 2 to 50 All 51
34、 to 1200 80 1201 to 3200 120 3201 to 35,000 189 35,001 to 150,000 218 150,001 to 500pOOO 270 500,001 and over 303 In ali cases: Acceptance number is ZERO Rejection number is ONE Y 4.5.1.1 Data cards. Data cards as specified in the contract or order (see 6.2) shall be prepared for each lot in accorda
35、nce with MIL-STD-1167. 4.5.2 Sampling. The sample selected shall represent only that quantity of units from which the sample was drawn and shall not be construed to represent any prior or subsequent quantities presented for inspection, Inspection sampling shall conform to table II, III, or as specif
36、ied herein, TABLE II. Sampling plan “ABt. 5 Licensed by Information Handling Services_ MIL-L-b0427B . _ 33 777770b - 0440083 b MIL-L-60 427B (MI) TABLE. III. Samplinq plan irBri. V Lot Size 2 to 13 14 to 150 151 to 280 281 to 500 501 to 1200 1201 to 3200 3201 to 10,000 10,001 to 35,000 35,001 to 150
37、000 500,001 and over 150,001 to 500,000 Sample Size Al 1 13 20 29 34 42 50 60 74 .90 102 In all cases: Acceptance number is ZERO Rejection number is ONE 4.5.3 Submission of product. At the time each completed lot of items deliverable under the contract is submitted to the Government for acceptance,
38、 the contractor shall, if specified in the contract or order (see 6.2), supply the following information accompanied by a certificate which attests that the information provided is correct and applicable to the product being submitted: a. A statement that the lot complies with all of the quality ass
39、urance provisions specified in this specification. b. Drawing and specification number and date, together with identification and date of changes. c. A statement that all material purchased by the contractor meets requirements, -when such material is controlled by Government or commercial specificat
40、ions referenced in any of the contractual documents, and that certificates of conformance are on file and available for review. d. Number of items in the lot. e. Date submitted. The certificate shall be signed by a responsible agent of the certifying organization. evidence of the agents authority to
41、 bind his principal. the agents authority will not be required with subsequent certificates unless, during the course of the contract, this authority is vested in another agent of the certifying organization. The initial certificate submitted shall be substantiated by Substantiation of 4.5.4 Examina
42、tion. The lockwire shall be subjected to examination and tests (see 4.6) to determine compliance with 3.3. 6 Licensed by Information Handling Servicesc . HIL-L-bO427B 13 = 777770b 0440082 B W MIL-L-60421B (MI) 4.5.5 Inspection equipment. Unless otherwise specified equipment tabulation number ET-4578
43、22 identiies the inspection equipment required to perform the examinations and tests specified herein. e 4.5.6 Lockwire (see drawinq 457822 and table IV). All dimensions apply after plating, TABLE IV, Classification of defects, lockwire. CategorieE Critical : 1. z. Major: 101. 102. 103. 104, 105. 10
44、6. 107, 108. 109 iio. ni. 112 Defects Height of lockwire hook “A“ Height of lockwire at hook “A“ end Kinks, sharp bends, sharp edges, Plating finish improper or Length lockwire hook IAb1 maximum Width lockwire hook “A“ maximum Cutout depthl minimum, (if Lockwire thickness at curved end Lockwire widt
45、h at curved end Thickness of lockwire Width of lockwire Height, base of hook after Height, base of lockwire to top Length, inside of hook “A“ to or burrs present mis sing applicable ) arming to horizontal, maximum curved end inside of curved end Method of inspection Gage Gage Visual Visual Gage Gage
46、 Gage Gage Gage Gage Gage Gage Gage Gage Sampling Plan 100% 100% Table II Sable II Table II Table II Table II Table II Tabl II Table III Table III Table II Table II Table II 4.6 Testing. 4.6.1 Plating adequacy tests for cadmium coating (see drawing 457822). The cadmium plating shall be tested to det
47、ermine compliance with thickness requirement of finish no, 1.1.1.2, table II, MIL-STD-171. One lockwire at the end of each eight hours of plating shall be subjected to this test. Failure of this lockwiFe to pass the test shall cause rejection of all plated material since the last acceptable sample.
48、This test shall be performed as specified in 4.7.1 using equipment in accordance with 4.5.5 to determine conformance to 3.3. 4.6.2 Plating adequacy test for zinc coatings (see drawing 457822). The zinc coating shall be tested to determine compliance with the thickness requirement of finish no. 1.9.2
49、2, table II, MIL-STD-171. One lockwire at the 0 Licensed by Information Handling ServicesMIL-L-bO927B 13 777770b 0990083 T W 7! r- MIL-L-60427B (MI) end of eight hours of plating shall be subjectedto this test. lockwire to pass the test shall cause rejection of all plated material since the.last acceptable sample, 4.7.2 using equipment in accordance with 4.5.5 to determine conformance to 3.4. Failure of the , This test shall be performed as specified in 4.6.3 Lockwire radius inspection (see drawing 457822). From each roll of wire check the radius
