1、AMSC N/A FSC 5985 INCH-POUND MIL-DTL-32054B 26 January 2012 SUPERSEDING MIL-DTL-32054A 20 August 2007 DETAIL SPECIFICATION MOUNTING MT-1995/A FOR USE WITH COAXIAL TYPE SA-521A/A RADIO FREQUENCY TRANSMISSION LINE SWITCH This specification is approved for use by all Departments and Agencies of the Dep
2、artment of Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements for the mounting device used in conjunction with radio frequency (RF) switch Type SA-521A/A (see MIL-DTL-25879). 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3 an
3、d 4 of this specification. This section does not include documents cited in other sections of this specification or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all sp
4、ecified requirements of documents cited in sections 3 and 4 of this specification, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified her
5、ein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-25879 - Switch, Radio Frequency Transmission Line, Coaxial Type SA-521A/A. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-202 - Test Method
6、Standard Electronic and Electical Component Parts. (Copies of these documents are available online at https:/assist.daps.dla.mil/quicksearch/ or https:/assist.daps.dla.mil or from the Defense Automated Printing Service, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.3 Non-Governmen
7、t publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). AEROSPACE INDUSTRIES ASSOCIATION (AIA) AIA/NAS NASM20426 - Rivet, Solid, Countersu
8、nk 100 Precision Head, Aluminum and Titanium Columbium Alloy. (Copies are available online at http:/www.aia-aerospace.org/ or from Aerospace Industries Association, 1000 Wilson Blvd, Suite 1700, Arlington, VA 22209-3928.) Comments, suggestions or questions on this document should be addressed to DLA
9、 Land and Maritime, ATTN: VAT, Post Office Box 3990, Columbus, OH 43218-3990, or emailed to TubesAmpsdla.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.daps.dla.mil. Provided by IHSNot for R
10、esaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32054B 2 ASTM INTERNATIONAL (ASTM) ASTM-B108/B108M - Aluminum-Alloy Permanent Mold Castings. (Copies may be purchased online at http:/astm.org or from ASTM INTERNATIONAL, 100 Barr Harbor Drive, West Conshohocken, PA 19
11、428-2959.) NATIONAL CONFERENCE OF STANDARDS LABORATORIES (NCSL) NCSL-Z540.3 - Laboratories, Calibration, and Measuring and Test Equipment. (Copies are available online at http:/www.ncsli.org or from National Conference of Standards Laboratories (NCSL), 2995 Wilderness Place Suite 107, Boulder, CO 80
12、301-5404.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulation
13、s unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article approval. Mountings furnished under this specification shall be products that meet requirements for first article approval (see 4.4 and 6.3). The mounting MT-1995/A and the switch SA-521A/A (see MIL-DTL-25879), shall
14、be first article approved together and at the same time (see figure 1). 3.1.1 Materials. Materials shall be used that will enable the mounting to meet the requirements of this specification. Acceptance or approval of any constituent material shall not be construed as a guaranty of the acceptance of
15、the finished product (see 4.2). The mounting MT-1995/A shall be aluminum alloy casting in accordance with ASTM-B108/B108M, alloy 356, temper T6, or equivalent, as determined by the acquiring activity. 3.1.1.1 Dissimilar metals. Unless suitably protected against electrolytic corrosion, dissimilar met
16、als shall not be used in intimate contact with each other. Dissimilar metals are defined as metal specimens that are in contact or otherwise electrically connected to each other in a conductive solution and that generate an electric current. 3.1.1.2 Fungus. Materials used in the construction of moun
17、tings shall be fungus inert. Fungus inert material is defined as a material which, in all modified states and grades, is not a nutrient to fungi. 3.1.1.3 Finish. The mounting MT-1995/A, except the bottom surface of the mounting, shall be anodized. For guidance on finishes see 6.5. 3.1.1.4 Pure tin.
18、The use of pure tin as an underplate or final finish is prohibited both internally and externally. Tin content of the mounting device components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minimum of 3 percent lead, by mass (see 6.8). 3.1.2 Maintainability. Mounting
19、provisions shall ensure that a minimal amount of maintenance time and effort is required for removal and replacement, using standard tools only. 3.2 Design and construction. The mounting MT-1995/A outline and dimensions shall be consistent with figure 1. 3.2.1 Drawings and procedures. The original d
20、esign and construction drawings and production procedures as approved by first article testing shall remain available for inspection by the cognizant government inspector. No changes or waivers shall be allowed without approval of the acquiring activity (see 6.3). 3.2.2 General. Any military specifi
21、cation, standard, or handbook referred to in this specification may be replaced by an equivalent commercial standard as determined by the acquiring activity (see 6.3). 3.2.3 Mounting provisions. The mounting MT-1995/A shall mate with the R.F. switch SA-521A/A (see MIL-DTL-25879). Positive electrical
22、 continuity between the switch unit and the individual fasteners shall be assured. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32054B 3 3.2.4 Retention devices. All screws and other hardware shall be adequately equipped with retaining dev
23、ices to prevent loosening from vibration or shock over the life of the mounting. FIGURE 1. Outline and dimensions for mounting MT-1995/A. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32054B 4 Inches mm Inches mm Inches mm .001 .02 .350 8.8
24、9 1.25 31.75 .002 .05 .438 11.12 1.38 35.05 .003 .08 .56 14.22 1.406 35.71 .03 .76 .562 14.27 2.000 50.80 .06 1.52 .75 19.05 2.125 53.98 .093 2.36 .81 20.57 2.56 65.02 .209 5.31 .875 22.22 2.62 66.55 .22 5.59 1.000 25.40 2.812 71.42 .28 7.11 1.125 28.58 3.25 82.55 NOTES: 1. Dimensions are in inches.
25、 2. Metric equivalents (to the nearest 0.01 mm) are given for general information only. 3. Unless otherwise specified, tolerances are .010 inch (0.25 mm) for three place decimals and .03 inch (0.76 mm) for two place decimals. 4. Except as shown, inside radii shall be .19 inch (4.83 mm) maximum. 5. T
26、he following instructions are to be printed in .06 inch (1.52 mm) high letters: “One quarter turn left releases the fastener. To fasten, push in, turn left and test to right for unrestricted quarter turn. If resistance is felt, turn more to the left, turn right to engage and tighten.“ FIGURE 1. Outl
27、ine and dimensions for mounting MT-1995/A. Continued 3.2.5 Weight. The weight of the mounting shall not exceed 8 ounces. 3.3 Environmental requirements. The mounting shall not degrade or deteriorate due to environmental test exposure that the mounting experiences during environmental testing with an
28、 associated switch. The mounting shall in no way contribute to switch failure or switch degradation during environmental tests. 3.3.1 Thermal shock. When tested as specified in 4.7.2, the mounting shall exhibit no evidence of deterioration or degradation. 3.3.2 Shock. When tested as specified in 4.7
29、.3, the mounting shall exhibit no evidence of deterioration or degradation. 3.3.3 Random vibration. When tested as specified in 4.7.4, the mounting shall exhibit no evidence of deterioration or degradation. 3.3.4 Humidity. When tested as specified in 4.7.5, the mounting shall exhibit no evidence of
30、deterioration or degradation. 3.3.5 Salt atmosphere. When tested as specified in 4.7.6, the mounting shall exhibit no evidence of deterioration or degradation. 3.3.6 Reliability. When tested as specified in 4.7.7, the mounting shall exhibit no evidence of deterioration or degradation. 3.4 Marking (s
31、ee 3.1). Mountings shall be marked in a legible and permanent manner with the following information. Minimum marking shall include the following: a. Part or Identifying Number (PIN): MT-1995/A. b. Contract number: As assigned by acquiring agency. c. Manufacturer CAGE code. The marking shall remain l
32、egible after completing all environmental tests. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32054B 5 3.5 Workmanship. Mountings shall be manufactured and processed in a careful and workmanlike manner, in accordance with good design and s
33、ound engineering practice, and to requirements of this specification. For guidance on workmanship see 6.6. 4. VERIFICATION 4.1 Classification of inspections. The inspections specified herein are classified as follows: a. Materials inspection (see 4.2). b. First article inspection (see 4.4). c. Confo
34、rmance inspection (see 4.5). 4.2 Materials inspection. Materials inspection shall consist of certification supported by verifying data (see 6.3) that the materials used in fabricating the mountings are in accordance with the applicable specifications or requirements listed in table I prior to such f
35、abrication. TABLE I. Materials inspection. Material Requirement paragraph Dissimilar metals - - - - - Fungus - - - - - - - - - - - - Finish- - - - - - - - - - - - - - 3.1.1.1 3.1.1.2 3.1.1.3 4.3 Inspection conditions. Unless otherwise specified herein, all inspections shall be performed in accordanc
36、e with the test conditions specified in the “GENERAL REQUIREMENTS“ of MIL-STD-202. 4.4 First article inspection (see 3.1). First article inspection shall be performed at a laboratory acceptable to the Government (see 6.3) on sample units produced with equipment and procedures normally used in produc
37、tion. First article approval inspection of mountings shall be conducted together and at the same time as first article approval inspection of associated switch samples. 4.4.1 Sample size. Twelve mountings shall be subjected to first article inspection tests specified herein. 4.4.2.1 Inspection routi
38、ne (see 3.3). The sample shall be subjected to the inspections specified in table II, in the order shown. All sample units shall be subjected to the inspections of group I. The sample shall then be divided into two groups of six units each. The sample units shall then be subjected only to the inspec
39、tions indicated for their particular group. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32054B 6 TABLE II. First article inspection. Examination or test Requirement paragraph Test paragraph Group I (all samples) Visual, mechanical and env
40、ironmental Marking Workmanship Weight Thermal shock Humidity Salt atmosphere Group II (6 samples) Shock Random vibration Group III (6 samples) Reliability 3.2, 3.3 3.4 3.5 3.2.5 3.3.1 3.3.4 3.3.5 3.3.2 3.3.3 3.3.6 4.7.1 4.7.1 4.7.1 4.7.1 4.7.2 4.7.5 4.7.6 4.7.3 4.7.4 4.7.7 4.4.3 Failures. No failure
41、s shall be allowed for first article inspection; a failure shall be anything that does not meet the requirements of the specification. 4.5 Conformance inspection. 4.5.1 Inspection of product for delivery. Inspection of product for delivery shall consist of group A. 4.5.1.1 Inspection lot. An inspect
42、ion lot shall consist of all mountings produced under essentially the same conditions, and offered for inspection at one time. The lot size shall not exceed 200. 4.5.1.2 Group A inspection. Group A inspection shall consist of the examination and tests specified in table III, in the order shown. 4.5.
43、1.2.1 Inspection plans. This specification utilizes an accept on zero defect (c = 0) sampling plan. Sampling shall be in accordance with table III. Sample categories indicated in table III shall be cross referenced to the appropriate sample sizes in table IV. TABLE III. Group A inspection. Examinati
44、on or test Requirement paragraph Test paragraph Sample category Subgroup I Visual and mechanical Marking Workmanship Weight Subgroup II Reliability 3.2 3.4 3.5 3.2.5 3.3.6 4.7.1 4.7.1 4.7.1 4.7.1 4.7.7 A B B A 1/ 1/ Monthly sample size shall be a minimum of three per lot. Provided by IHSNot for Resa
45、leNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32054B 7 TABLE IV. Sampling plans. Sample category Sample size A B C Lot size 2 to 8 9 to 15 16 to 25 26 to 50 51 to 90 91 to 150 151 to 200 All All All All All All All All All 16 20 20 20 20 all all all 26 32 32 32 4.5.1
46、.3 Rejected lots. If an inspection lot is rejected, the supplier may rework it to correct the defects, or screen out the defective units, and resubmit for re-inspection. Resubmitted lots shall be inspected using sample size C in accordance with table IV in place of sample size B for group A inspecti
47、on until at least three consecutive lots have passed. Such lots shall be clearly separate from new lots, and shall be clearly identified as re-inspected lots. 4.5.1.4 Disposition of sample units. Sample units which have been subjected to group A, subgroup II inspection shall not be delivered on the
48、contract or purchase order. 4.5.2 Group B inspection. Group B inspection shall consist of the tests specified in table V, in the order shown. Group B inspection shall be made on sample units which have passed group A subgroup I inspection. Except where the results of these inspections show noncompli
49、ance with the applicable requirements, delivery of products which have passed group A shall not be delayed pending the results of these verification inspections. TABLE V. Group B inspection. 1/ Test Requirement paragraph Test paragraph Thermal shock - - - - - - - - - - - Random vibration - - - - - - - - - Shock - - - - - - - -
