DLA MIL-P-642 D-1979 PLUGS TELEPHONE AND ACCESSORY SCREWS GENERAL SPECIFICATION FOR.pdf

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1、MIL-P-642D MIL-P-642C 3 July 1973, and 11 April 1973 MIL-T-81643(AS) MILITARY SPECIFICATION PLUGS, TELEPHONE, AND ACCESSORY SCREWS, GENERAL SPECIFICATION FOR This specification is approved for use by all Depart- ments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification

2、covers telephone plugs used in telephone (including telephone switchboard consoles), telegraph, and teletype circuits, and for connecting headsets, handsets, and microphones into communications circuits. 2. APPLICARLE DOCUMENTS 2.1 Issues of documents. The following documents of the issue in effect

3、on date of invitation for b.ids or request for proposal form a part of this specification to the extent specified herein. SPECIFICATIONS MILITARY MIL-W-76 - Wire and Cable, Hookup, Electrical, Insulated. MIL-P-79 . - Plastic Rods and Tubes, Thermosetting, Laminated. MIL-”20693 - Molding Plastic, Pol

4、yamide (Nylon), Rigid. MIL-P-22985 - Plastic Molding and Extrusion Material, Ethyl Cellulose. MIL-C-45662 - Calibration System Requirements. MIL-C-55330 - Connectors, Preparation for Delivery of. (See supplement 1 for list of specification sheets). STANDARDS MILITARY MIL-STD-105 - Sampling Procedure

5、s and Tables for Inspection by Attributes. MIL-STD-202 - Test Methods for Electronic and Electrical Component Parts. MIL-STD-454 - Standard General Requirements for Electronic Equipment. MIL-STD-1285 - Marking of Electrical and Electronic Parts. MS3543D - Terminal, Lug, Solder Type, Copper Stamping,

6、 One Hole. (Copies of specifications, standards, drawings, 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.) 7 eneficial comments (recommendations, additions, deletions

7、) and any pertinent US Army Electronics Command, ATTN: DRDCO-CH -DM., Fort Monmouth, NJ 07703 data which may be of use in improving thic document should be addressed to: by using the self-addressed Standardization Document Improvement Proposal (DO Form 1426) appearing at the end of this document or

8、by letter. * FSC 5935 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-bclZD 59 W 777790b 0007683 b MIL-P-6420 2.2 Other publications. The following document forms a part of this specification to the extent specified herein. Unless otherwise ind

9、icated, the issue in effect on date of invitation for bids or request for proposal- shall apply. NATIONAL BUREAU OF STANDARDS Handbook H28 - Screw-Thread Standards for Federal Services. (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Washin

10、gton, D.C. 20402.) (Technical society and technical association specifications and standards are generally available for reference from libraries. They are al so distributed among technical groups and using Federal agencies.) 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements

11、 shall be as specified herein and in accordance with the applicable specification sheets. In the event of any conflict between requirements of this specification and the specification sheet, the latter shall govern. 3.2 Classification of requirements. The requirements for the plugs are classified he

12、rein as follows: Requirement Paragraph Qualification - - - - - - - - - - - - - - - - - 3.3 Materials - - - - - - - - - - - - - - - - - - 3.4 performance - - - - - - - - - - - - - - - - - 3.6 Design and construction - - - - - - - - - - - - 3.5 3.3 Qualification. Plugs furnished under this specificati

13、on shall be products which are qualified for listing on the applicable qualified products list at the time set for opening of bids (see 4.4 and 6.4). 3.4 Materials. The materials shall be as specified herein. However, when a definite material is not specified, a material shall be used which will ena

14、ble the plugs to meet the performance requirements of this specification. Acceptance or approval of any constituent material shall not be construed as a guaranty of the acceptance of the finished product. fungus-inehirement 4 of MIL-STD-454). 3.4.1 Fun us-inert. Materials used in the construction of

15、 these plugs shall be 3.4.2 Shells. Unless otherwise specified (see 3.1), shells shall be plastic in accordance with MIL-M-20693; form R or Tm, type PBE, of MIL-P-79; type II of i MIL-P-22985; or a substituted polyarylether material, such as a polysulfone. corrosion-resistant material, or shall be s

16、uitably protected against corrosion to permit compliance with the salt spray requirement of 3.6.9. 3.4.3 Screws, nuts, and washers. Screws, nuts, and washers shall be made of 3.4.4 Plating of metal parts. When speclfied (see 3.1), the plating shall be sufficient to prevent corrosion of the basis met

17、al. 3.5 Design and construction. Plugs shall be of the design, construction, and physical dimensions specified (see 3.1). and terminal lugs (MS35430-1) shall be supplied, unassembled, and packaged with each 3.5.1 Shell screws, terminal screws, and lugs. Shell screws, terminal screws, Plug. 3.5.2 Scr

18、ew threads. Screw threads on removable or replaceable threaded parts shall be in accordance with Handbook H28. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-bY2D 59 999990b 000768Y 8 MIL-P-642D 3.5.3 Cable clamp (when specified (see 3.11. A

19、 cable clamp for anchoring the electrical cable to the frame of the plug shall be supplied with the plug. If the cable clamp is not made as integral part of the plug the clamp shall be loosely assembled to or packaged with the plug. Twine serving is not acceptable for this service. 3.5.4 Conductor s

20、train relief (when specified (see 3.11. Provisions for anchoring the stay cord to provide strain relief for the conductors of the electrical cable shall be included in the plug. All edges of the anchor in contact with the stay cord shall be rounded off. 3.6 Performance. 3.6.1 Torque (unless otherwis

21、e specified (see 3.1). When plugs are tested as specified in 4.6.2, torque applied between the separate metal parts of the plug finger shall cause no damage to, or loosening of, any parts thereof. 3.6.2 Dielectric Withstanding voltage. When tested as specified in 4.6.3, plugs shall withstand a minim

22、um of 500 volts root mean square (rms) without dielectric breakdown or flashover. 3.6.3 Contact resistance. When plugs are tested as specified in 4.6.4, the contact resistance shall not exceed 0.02 ohm, except following the salt spray test, the contact resistance shall not exceed 0.10 ohm. 3.6.4 Ins

23、ulation resistance. When plugs are tested as specified in 4.6.5, the insulation resistance shall be 1,000 megohms or greater. 3.6.5 Moisture resistance. When plugs are tested as specified in 4.6.6, the initial insulation resistance shall be not less than 1,000 megohms, and the initial dielectric wit

24、hstanding voltage shall be as specified in 3.6.2. Following step 6 of the final cycle, at a relative humidity of 90 to 95 percent, the insulation resistance shall be not less than 5 megohms. Following the 24-hour conditioning period, the insulation resistance shall be not less than 1,000 megohms, an

25、d dielectric withstanding voltage and contact resistance shall be as specified in 3.6.2 and 3.6.3, respectively; shells and other insulation shall not be cracked, warped, or delaminated; there shall be no excessive corroslon (see 3.6.9) of metal parts; all marking shall remain legible; it shall be p

26、ossible to remove and replace screw-on shells without the use of tools; and the outside diameter of the insulating spacer(s) between the tip and sleeve shall be as specified (see 3.1). 3.6.6 Thermal shock. When plugs are tested as specified in 4.6.7, shells and other insulation shall not be cracked,

27、 warped, or delaminated; the electrical continuity shall not be affected; all marking shall remain legible; and it shall be possible to remove and replace screw-on she1 1 s without the use of tool s. 3.6.7 Vibration, hiqh frequenc . When plugs are tested as specified in 4.6.8,. there shall be no dam

28、age or loosenfno of Darts. the matina iack shall not seDarate from the plug, and the-contact resisianceshali be as specified in 3.6.3. 3.6.8 Shock (specified pulse). When plugs are tested as specified in 4.6.9, there shall be no visual evidence of mechanical damage, loosening of parts, or rupture of

29、 dielectric materials. 3.6.9 Salt spray (corrosionl. When plugs are tested as specified in 4.6.10, there shall be no excessive corrosion of metal parts; the insulation shall not be cracked, warped, or delaminated; and the contact resistance shall be as specified in 3.6.3. Excessive corrosion shall b

30、e construed as any corrosion which interferes with electrical performance, or, in the case of plated metals, when the corrosive action has passed through the plating and attacked the basis metal. Exposed screw threads may be protected with a suitable coating. 3.6.10 Insertion and withdrawalforces. W

31、hen jacks are tested as specified in 4.6.11, the insertion and withdrawal forces shall be as specified (see 3.1). 3.6.11 Strain relief (when specified (see 3.1) . When tested as specified in 4.6.12, there shall be no evidence of damage or culting of the conductors or stay cord. 3 Provided by IHSNot

32、for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-6420 3.6.12 Longitudinal pull (when specified (see 3.111. When tested as specified in 4.6.13, there shall be no damage or loosening of parts, loss of electrical continuity for more than a period of ten microseconds

33、with a current of 100 t2 milliamperes dc, and the mating jack shall not separate from the plug, and the contact resistance shall be as specified in 3.6.3. 3.6.13 Static load (when specified (see 3.1). When plugs are tested as specified in 4.6.14, there shall be no damage or loosening of parts. 3.6.1

34、4 Stack assembly strength (when specified (see 3.1). When tested as specified in 4.6.15, there shall be no damage or loosening of parts. 3.6.15 Controlled drop (when specified (see 3.1). When tested as specified in 4.6.16, there shall be no damage or loosening of parts. 3.17 Marking. Plugs shall be

35、marked in accordance with method I of MIL-STO-1285, and shall include the manufacturers name, trademark, or source code and the part number (see 3.1). 3.18 Workmanshie. Plugs shall be processed in such a manner as to be uniform in quality and shall be free from defects that will affect life, service

36、ability, and appearance. There shall be no evidence of loose contacts; poor or improper molding or fabrication; damaged or improperly assembled contacts; peeling, flaking, or chipping of plating or finish; mechanical damage due to testing environment; nicks or burrs of metal parts or surfaces; impro

37、per or incorrect marking; or improper tinning of solder cups, terminals, pins, or contacts. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract, the contractor is responsible for the performance of all inspection requirements as specified her

38、ein. Except as otherwise specified in the contract, 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 perform any of the inspections set forth

39、 in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.1.1 Test equipment and inspection facilities. Test and measuring equipment and inspection facilities of sufficient accuracy, quality and quantity to permit performa

40、nce of the required inspection shall be established and maintained by the contractor. The establishment and maintenance of a calibration system to control the accuracy of the measuring and test equipment shall be in accordance with MIL-C-45662. 4.2 Classification of inspections. The inspections spec

41、ified herein are classified as follows: a. Qualification inspection (see 4.4). b. Quality conformance inspection (see 4.5). 4.3 Inspection conditions. Unless otherwise specified herein, all inspections shall be performed in accordance with the test conditions specified in the “GENERAL REQUIREMENTS“

42、Of MIL-STD-202. 4.4 Qualification inspection. Qualification inspection shall be performed at a laboratory acceptable to the Government (see 6.4) on sample units produced with equipment and procedures normally used in production. 4.4.1 Sample size. Twelve plugs of each type shall be subjected to qual

43、ification inspection. 4.4.2 Inspection routine. The sample shall be subjected to the inspections specified in table I, in the order shown. All sample units shall be subjected to the inspection of group I. The sample shall then be divided equally into two groups of six units each and subjected .to th

44、e inspection for their particular group. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-flIL-P-692D 57 m 9999906 0007bdb L m MIL-P-6429 TABLE I. Qualification inspection. Inspection Group I - all sample units Visual and mechanical examination lJ -

45、 - Torque (when applicable) - - - - - - - - Dielectric withstanding voltage - - - - Contact resistance - - - - - - - - - - - Insu1 ation resistance - - - - - - - - - Insertion and withdrawal forces - - - - Longitudinal pull - - - - - - - - - - - Strain relief - - - - - - - - - - - - - Static load -

46、- - - - - - - - - - - - - Group II - 6 sample units Moisture resistance - - - - - - - - - - Group III - 6 sample units Thermal shock - - - - - - - - - - - - - Vibration, high frequency - - - - - - - Shock (specified pul se) - - - - - - - - Salt spray (corrosion) - - - - - - - - - Stack assembly stre

47、ngth - - - - - - - - Controlled drop - - - - - - - - - - - - Requirement paragraph 3.1, 3.4, 3.5, 3.17 and 3.18 3.6.1 3.6.2 3.6.3 3.6.4 3.6.10 3.6.11 3.6.12 3.6.13 3.6.5 3.6.6 3.6.7 3.6.8 3.6.9 3.6.14 3.6.15 Test paragraph 4.6.1 4.6.2 4.6.3 4.6.4 4.6.5 4.6.11 4.6.12 4.6.13 4.6.14 4.6.6 4.6.7 4.6.8 4

48、.6.9 4.6.10 4.6.15 4.6.16 - 1/ Marking will be considered a defect only if it is illegible at the completion of any of the required tests. 4.4.3 Failures. One or more failures shall be cause for refusal to grant qualification approval. 4.4.4 Retention of qualification. To retain qualification, the c

49、ontractor shall forward a report to the qualifying activity at 24 month intervals. The qualifying activity shall establish the initial reporting date. Subsequent reporting periods wi 11 be 36 months each. The report shall consist of: a. A summary of the results of the tests performed for inspection of product for delivery, groups A and B, indicating as a minimum the number of lots that have passed and the number that have failed. The results of tests of all reworked lots shall be identified and account