1、J- 11-07 MIL-L-b3753*53 9377706 0303555 3 W 8 MIL-L-63953 (AR) 1 March 1988 I Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of we in improving this document should be addressed to: Commander, U.S. Army Armament,Munitions and Chemical Command, Attn. A
2、MSMC-QA. Picatinny Arsenal, New Jersey 07806-5000 by using the self-addressed Standardira- tion Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. MILITARY SPECIFICATION LOCK, COMBINATION, ASSEMBLY 1. SCOPE 1.1 Scope. This specification covers one type o
3、f cmbination lock, designated Lock, Combination, Assembly, which is used for multipurpose applications in the WADS program. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Standards. Unless otherwise specified, the following standards of the issue listed in that issue of the Department of De
4、fense Index of Specifications and Standards (DoDISS), specified in the solicitation, form a part of this specification to the extent specified herein. STANDARDS MI L I T ARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes. 2.1.2 Other Government documents, drawinqs, and pub
5、lications. The following other Government documents, drawings, and publications form a part of this specification to the extent specified herein. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-63953 (AR) PRODUCT DRAWINGS U.S. ARMY ARMAMENT RES
6、EARCH, DEVELOPMENT AND ENGINEERING CENTER 9349430 - Cover. 9349431 - Wheel, Code. 9349432 - Guide, Bolt. 9349433 - Bolt. 9349434 - Base. 9349435 - Lock, Combination, Assembly 9378103 - Shield, Lock. PACKAGING DATA SHEETS U.S. ARMY ARMAMENT RESEARCH, DEVELOPMENT AND ENGINEERING CENTER P9349435 Lock,
7、Combination, Assembly P9354312 Kit, Lock Installation Copies of specifications, standards, drawings, and publications required by manufacturers in connection with specific acquisition unctions, should be obtained from the contracting activity or as directed by the contracting officer. 2.2 Other publ
8、ications, The following document forms a part of this specification to the extent specified herein. The issue of the document, which is indicated as DoD adopted, shall be the issue listed in the current DoDISS and supplements thereto, i applicable, AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) A
9、STM D 3951 - Standard Practice for Commercial Packaging. Application for copies of ASTM publications should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103. 2.3 Order of precedence. In the event of a conflict between the text of this specifica
10、tion and the references cited herein, the text of this specification shall take precedence. 3 REQUIREMENTS Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I O a MIL-L-63953 53 W 9999906 0309557 7 W 3.1 Materials and components. Materials shall confor
11、m to applicable specifications and drawings. Each component shall conform to all dimensions and tests specified on the component drawing. The contractor shall have available verifiable proof (i.e., objective evidence (see 6.2.1) that materials and components were fabricated, inspected, and tested un
12、der controllable conditions as set forth in the contractors quality control or inspection procedures. 3.2 Assembly. The combination lock assembly shall comply with all requirements specified on drawing (dwg.) 9349435, with all requirements specified herein, and with the requirements of applicable sp
13、ecifications to the extent specified on the drawings and herein. 3.3 Combination selection. All procurement actions for this combination lock assembly should be based on achieving a broad mix and the least number of duplications of three-letter combination codes within the total lot being procured.
14、For example, in a lot of 3000 combination locks, there should be no more than three locks in the lot with the same code. If fewer than 1300 locks are procured in any one lot, the combination lock part numbers (dash numbers) shall be selected from the total range of 1331 available numbers. This shoul
15、d be accomplished by selecting every other dash number, or every third dash number, or every fourth dash number, etc., as appropriate, to obtain the broadest mix of codes within the lot size being procured. The listing of combination lock dash numbers, and associated three-letter combination codes,
16、is specified in the Appendix. The following 12 combination codes shall never be used, regardless of lot size (they are included in the Appendix to maintain continuity of the combination lock dash numbers) : ABC, AAA, BBB, CCC, DDD, EEE, FFF, GGG, HHH, III, JJJ, and KKK. 3.4 First article. When speci
17、fied, sample locks shall be subjected to first article inspection (see 4.3 and 6.1.1). 3.5 Functioning and operational torque. The lock shall be functioned five times by unlocking, extending the bolt, retracting the bolt, and locking. Each of the three code wheels shall then be rotated, three full t
18、urns in both directions, and the maximum torque required to turn eacki code wheel for one full turn, in both the CW and CCW directions, shall be between 2 - 10 inch-pounds. During this test, the lock shall not fail to function, and each code wheel shall be capable of being rotated smoothly in each d
19、irection of rotation without seizing or binding. Testing shall be as specified in 4.5.1. 3.6 High temperature. The lock skiall withstand a high temperature of 130 + 5OF, for a minimum period of 4 hours, without evidence of deterioration or damage that may impair its intended operation. While at the
20、high temperature (at the end of the high-temperature exposure period), the lock shall comply with the functioning and operational torque requirements of 3.5. Testing shall be as specified in 4.5.2. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.7
21、Low temperature. The lock shall withstand a low temperature of -25O + 5OF for a minimum period of 4 hours, without evidence of deterioration or damage that may impair its intended operation. While at the low temperature (at the end of the low-temperature exposure period), the lock shall comply with
22、the functioning and operational torque requirements of 3.5. Testing shall be as specified in 4.5.3. of 95 -I- 5 percent and a temperature of 130 + 5OF without evidence of corrosion and without evidence of deterioration or damage that may impair its intended operation. After this test (at room temper
23、ature), the lock shall comply with the functional and operational torque requirments of 3.5. The lock shall be disassembled, and each part shall be visually inspected. There shall be no evidence of corrosion and no evidence of deterioration or damage that may impair its intended operation. The lock
24、shall then be reassembled, and it shall comply with the functional and operational torque requirements of 3.5. Testing shall be as specified in 4.5.4. 3.8 Humidity. The lock shall withstand a relative humidity 3.9 Serialization. Not applicable. 3.10 Workmanship. All parts and accessories shall be co
25、nstructed, assembled, and finished in a thoroughly workmanlike manner. marking, cleaning, and freedom of the parts from burrs and sharp edges which may affect performance or result in injury during handling. All parts shall be free of chips, dirt, grease, rust, arid other foreign material. The clean
26、ing method shall not be injurious to any of the parts, nor shall the parts be contaminated by the cleaning agents. Particular attentin shall be given to neatness, 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsiblity for inspection. Unless otherwise specified in the contract or purchase order, the suppl
27、ier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier mzy use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by
28、the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to ensure supplies and services conform to prescribed requirements. 4.2 Classification of inspection. The inspection requirements specified h
29、erein are classified as follows: a. First ar-ticle inspection (see 4.3) b. Quality conformance inspection (see 4.4) A - - ,e- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-L-63953 53 9979906 0304557 O m MIL-L-63953 (AR) 4.3 First article inspec
30、tion. 4.3.1 Submission. When the contract requires first article inspection, the contractor shall submit three consecutively produced locks to the testing facility designated in the invitation for bids or request for proposal. 4.3.2 Inspection and testing to be performed. The first article inspectio
31、n samples shall be inspected for the defects specified in 4.4.2.1, using inspection methods contained therein, and for all the requirements of Section 3. The test requirements of Section 3 are listed in Table I, and the locks shall be tested using the test methods specified in 4.5. Inspection and te
32、sting shall be performed with the acceptance inspection equipment specified in 4.4.4. The locks shall be tested in the order specified in Table I. If any lock fails to comply with any of the applicable requirements, the first article samples shall be rejected. The Government reserves the right to te
33、rminate its inspections upon any failure of the first article samples to comply with the stated requirements. This series of tests is not considered destructive, and samples so tested may be returned to the lot. TABLE I. First article tests. Requirement Test paragraph a. Functioning and operational
34、torque 3.5 b. High temperature 3.6 c. Low temperature 3.7 d. Humidity 3.8 4.4 Quality conformance inspection. 4.4.1 Inspection lot. A lot or batch and its formation, size, and presentation is described in MIL-STD-105, Section 5. Accordingly, a lot shall mean an inspection lot, and a batch shall mean
35、 an inspection batch for the purposes of this specification. The manner in which each inspection lot or batch is to be presented and identified by the contractor shall be designated or approved by the Government representative. 4.4.2 Product inspection examination. A sample shall be selected at rand
36、oin from each insDection lot in accordance with the major defect or other minor defect table as applicable (see Table II). Any defect found in the sample, selected for the major or minor classification, shall reject the lot. Inspection of major defect 102, of the code wheel (see 4.4.2.1.11, shall be
37、 conducted on a 100 percent basis. If any code wheel fails to Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- requirements of major defect 102, the code wheel shall be removed from the lot. The sequence of inspections for the classification of defec
38、ts need not be followed so long as all the defect inspections are performed. If any component is produced by tool manufacture control (see 6.4), inspection sampling may be as specified in 6.4. TABLE II. Inspection lot sampling. Major defect table Minor defect table Lot size Sample size Lot size Samp
39、le size 1-10 all 11-20 LO 21-35 19 36-50 26 51-70 30 71-90 33 91-120 35 121-150 37 151-200 39 201 and over 41 1-10 all 11-20 8 21-35 13 36-50 16 51-70 17 91-120 19 121-150 20 151-200 21 201 and aver 22 71-90 ia 4.4.2.1 Classification of defects. Critical, major, and minor defects are defined in MIL-
40、STD-105. 4.4.2.1.1 Bolt (see dwq. 9349433). Categories Defects Method of inspection Critical: None defined Major: 101. 102. 103. 104 105. 106 . 107 . 108. 109. Length, Min . Gage Thickness, min. . Gage bolt, min. (2 teeth). Gage Width of tooth at right side of bolt, min Gage bolt, min Gage of bolt,
41、min. (2 teeth) . Gage Location of larger hole . Gage Diameter of larger hole, min. Gage 3 teeth). Gage Width of tooth at left side of Height of tooth near left end of Height of tooth near right end Chamfer of tooth incorrect (4 places, 6 Provided by IHSNot for ResaleNo reproduction or networking per
42、mitted without license from IHS-,-,-O a a MIL-L-63753 53 m 7777706 0307563 7 m MI L-L- 6 3 95 3 ( AR) Minor: 201. Chamfer missing or improper (on bottom 202. Protective finish inadequate or improper. . Visual 203. Evidence of poor workmanship (see 3.10) Visual of bolt and on right end) . Visual 4.4.
43、2.1.2 Wheel, Code (see dwq. 9349431). Categories Defects Method of inspection Critical: None defined. Major: 101. Depth of blind slot, min (see 102. Code letter sequence, letter position, table) (11 blind slots) . Gage number configurations) i/ .Visual/Gage and through slot position incorrect (as ap
44、plicable to each of the 12 part - i/ Inspection of defect 102 is to be conducted on a 100 percent basis. - Minor: 201. Knurl incomplete or improper (around 203. Marking missing, improper, or illegible Visual circumference of wheel) Visual 202. Protective finish inadequate or improper. . Visual 204.
45、Evidence of poor workmanship (see 3.10) Visual 4.4.2.1.3 Cover (see dwq. 9349430). Categories Defects Method of inspection Critical: None defined. Major: None defined. Minor: 201. Large chamfer on left side missing, incomplete, or improper Visual 202. Protective finish inadequate or improper. . Visu
46、al 203. Evidence of poor workmanship (see 3.10) Visual 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_- - MIL-L-63953 53-1 97q90b 01095bZ O 1 4.4.2.1.4 Base (see dwg. 9349434). Cat egor i es Defects Critical: None defined. Method of Inspection Ma
47、jor: 101. Location of threaded hole (4 holes) . . . Gage 102. Pitch diameter of threaded hole (4 holes) Gage -_ 103. Minor diameter of threaded hole, max. (4 holes) Gage 104. Location of hole at 6 oclock position. . Gage Minor: 201. Protective finish inadequate or improper. . Visual 202. Evidence of
48、 poor workmanship (see 3.10) Visual 4.4.2.1.5 Guide, Bolt (see dwq. 9349432). Cateqories Defects Method of Inspection Critical: None defined. Major: None defined Minor : 201, Chamfer, on end of guide, missing or improper Visual 202. Protective finish inadequate or improper. . Visual 203. Evidence of
49、 poor workmanship (see 3.10) Visual 4.4.2.1.6 Shield, Lock (see dwg. 9378103). Categories Defects Method of Inspection Critical : None defined . Major : 101. Welded plate missing, improper, or 102. Configuration of shield improper improperly attached (2 plates). Visual (including radii of sides). Visual Minor: 201. Protective finish inadequate or improper. . Visual 202. Evidence of poor workmanship (see 3.10) Visual Provided by IHS
