1、 INCH-POUND DETAIL SPECIFICATION CONNECTORS, GENERAL PURPOSE, ELECTRICAL, MINIATURE, CIRCULAR, ENVIRONMENT RESISTING, GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers an enviro
2、nment-resisting family of miniature, circular, electrical connectors (plugs and receptacles), designed to meet the requirements of aerospace vehicles. 1.2 Physical characteristics. The physical characteristics for connectors include a series of plugs and receptacles in which both the socket contact
3、inserts and the mating pin inserts have resilient faces. The available forms are as shown below: a. Coupling types - Threaded (type T) and bayonet (type B). b. Nine shell sizes - (8, 10, 12, 14, 16, 18, 20, 22, and 24). c. Various contact arrangements and sizes, including low frequency shielded cont
4、acts. d. Six different shell polarization positions. e. Six classes - Environment resisting (class R); hermetic (class H); stainless steel (class E); fluid resisting (class F); grounding (class G); firewall (class K). f. Contact styles - “P“ pin, “S“ socket, “C“ pin solder cup, “E“ pin solder eyelet
5、 (styles C and E only for hermetic). Comments, suggestions, or questions on this document should be addressed to DLA Land and Maritime, ATTN: VAI, P.O. Box 3990, Columbus, OH 43218-3990 or emailed to CircularConnectordla.mil. Since contact information can change, you may want to verify the currency
6、of this address information using the ASSIST Online database at https:/assist.daps.dla.mil. AMSC N/A FSC 5935 MIL-DTL-26500G 22 July 2011 SUPERSEDING MIL-DTL-26500F 6 February 2004 Inactive for new design after 12 March 1973. For new design, use MIL-DTL-83723, series III. Provided by IHSNot for Resa
7、leNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-26500G 2 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specif
8、ication 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 specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they
9、 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 herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or
10、contract (see 6.2). FEDERAL STANDARDS FED-STD-H28 - Screw-Thread Standards for Federal Services. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-PRF-5606 - Hydraulic Fluid, Petroleum Base, Aircraft, Missile, and Ordnance. MIL-DTL-5624 - Turbine Fuel, Aviation Grades JP-4 and JP-5. MIL-S-7742 - Screw Thread
11、s, Standard, Optimum Selected Series; General Specification for. MIL-PRF-7808 - Lubricating Oils, Aircraft Turbine Engine, Synthetic Base. MIL-A-8625 - Anodic Coatings for Aluminum and Aluminum Alloys. MIL-DTL-8777 - Wire, Electrical, Silicone-Insulated, Copper, 600-volt, 200C. MIL-L-10547 - Liners,
12、 Case, and Sheet, Overwrap, Water-Vaporproof or Waterproof, Flexible. MIL-DTL-16878 - Wire, Electrical, Insulated, General Specification for. MIL-PRF-23699 - Lubricating Oil, Aircraft Turbine Engine, Synthetic Base, NATO Code Number O-156. MIL-DTL-25038 - Wire, Electrical, High Temperature, Fire Res
13、istant, and Flight Critical. MIL-PRF-46010 - Lubricant, Solid Film, Heat Cured, Corrosion Inhibiting, NATO Code S-1738. MIL-M-83521/6 - Maintenance Kit, Electrical Connectors, Contacts, Connector and Cable. Accessories: Maintenance Kit, General Purpose Use. MIL-DTL-83723/59 - Connectors, Electrical,
14、 (Circular, Environment Resisting), Protective Covers, Plugs (for MIL-DTL-26500 and MIL-DTL-83723, Series III, Classes A, M, R, T, W and Z). MIL-DTL-83723/60 - Connectors, Electrical, (Circular, Environment Resisting), Protective Covers, Electrical, Connector, Receptacles for MIL-DTL-26500 and MIL-D
15、TL-83723, Series III, Classes A, M, R, T, W and Z) . MIL-DTL-83723/61 - Connectors, Electrical, (Circular, Environment Resisting), Dummy Connector, Receptacles for MIL-DTL-26500 and MIL-DTL-83723, Series III, Classes A, M, R, T, W and Z). Provided by IHSNot for ResaleNo reproduction or networking pe
16、rmitted without license from IHS-,-,-MIL-DTL-26500G 3 DEPARTMENT OF DEFENSE STANDARDS MIL-STD-202 - Test Methods for Electronic and Electrical Component Parts. MIL-STD-889 - Dissimilar Metals. MIL-STD-1554 - Insert Arrangements for MIL-DTL-83723 Series III and MIL-DTL- 26500 Environment Resisting, C
17、ircular, Electrical Connectors. MS24265 - Connector, Receptacle, Electrical, Single Hole Mount Miniature, Classes E, F, G, H and R (Inactive for new design). MS25471 - Wire, Electrical, Silicone-Insulated, Copper, 600 Volt, 200C Polyester Jacket. MS27034 - Connector, Receptacle, Electrical, Pin Inse
18、rt, Cylindrical, Miniature, Hermetic, Solder Mount. MS27291 - Support, Cable, Electrical Connector. MS27488 - Plug, End Seal, Electrical Connector. MS27558 - Support, Cable, Right Angle, Closed. MS27559 - Support, Cable, Right Angle. MS27657 - Short Support, Cable, Electrical Connector, (For Class E
19、 and K Connectors). MS27658 - Long Support, Cable, Electrical Connector (For Class E and K Connectors) MS27659 - 90 Degree Support, Cable, Electrical Connector (For Class E and K Connectors) (See supplement 1 for list of specification sheets.) (Copies of these documents are available online at https
20、:/assist.daps.dla.mil/quicksearch/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) 2.3 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the iss
21、ues of these documents are cited in the solicitation or contract (see 6.2). ASTM INTERNATIONAL ASTM-B211 - Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes. ASTM-A342/A342M - Standard Test Methods for Permeability of Feebly Magnetic Materials. ASTM-A967 - Chemical Passivati
22、on Treatments for Stainless Steel Parts. (Copies of these documents are available online at http:/www.astm.org or ASTM International, P.O. Box C700, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.) ELECTRONIC COMPONENTS ASSOCIATION (ECA) EIA-364 - Electrical Connector/Socket Test Procedures
23、 including Environmental Classifications. EIA-364-20 - Withstanding Voltage Test Procedure for Electrical Connectors, Sockets and Coaxial Contacts. EIA-364-21 - Insulation Resistance Test Procedure for Electrical Connectors, Sockets, and Coaxial Contacts. Provided by IHSNot for ResaleNo reproduction
24、 or networking permitted without license from IHS-,-,-MIL-DTL-26500G 4 EIA-364-26 - Salt Spray Test Procedures for Electrical Connectors, Contacts and Sockets. EIA-364-27 - Mechanical Shock (Specified Pulse) Test Procedures for Electrical Connectors. EIA-364-28 - Vibration Test Procedure for Electri
25、cal Connectors and Sockets. EIA-364-29 - Contact Retention Test Procedure for Electrical Connectors. EIA-364-31 - Humidity Test Procedure for Electrical Connectors and Sockets. (Copies of these documents are available online at http:/ec-central.org or from the Electronic Components Association, Engi
26、neering Department, 2500 Wilson Boulevard, Arlington, VA 22201.) NCSL INTERNATIONAL NCSL-Z540.1 - Laboratories, Calibration, and Measuring and Test Equipment. (Copies of these documents are available online at http:/www.ncsli.org or from NCSL International 2995 Wilderness Place, Suite 107, Boulder,
27、Colorado 80301-5404) SAE INTERNATIONAL SAE-AIR1351 - Manufacturers Identification of Aerospace Electrical and Electronic Wiring Devices and Accessories. SAE-AMS-QQ-A-200 - Aluminum Alloy, Bar, Rod, Shapes, Structural Shapes, Tube, and Wire, Extruded: General Specification for. SAE-AMS-QQ-A-367 - Alu
28、minum Alloy Forgings. SAE-AMS-QQ-S-763 - Steel Bars, Wire, Shapes, and Forgings; Corrosion Resistant. SAE-AS22759 - Wire, Electrical, Fluoropolymer-Insulated, Copper or Copper Alloy. SAE-AS39029 - Contacts, Electrical Connector, General Specification for. SAE-AS39029/31 - Contacts, Electrical Connec
29、tor, Pin, Crimp Removable. SAE-AS39029/32 - Contacts, Electrical Connector, Socket, Crimp Removable. SAE-AS39029/54 - Contacts, Electrical Connector, Pin, Crimp Removable, Shielded. SAE-AS39029/55 - Contacts, Electrical Connector, Socket, Crimp Removable, Shielded. (Copies of these documents are ava
30、ilable at http:/www.sae.org or SAE World Headquarters, 400 Commonwealth Drive, Warrendale, PA 15096-0001.) 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 (except for related speci
31、fication sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein and in ac
32、cordance with the applicable specification sheet. In the event of any conflict between the requirements of this specification and the specification sheet, the latter shall govern. 3.2 Qualification. Connectors and accessories furnished under this specification shall be products that are authorized b
33、y the qualifying activity for listing on the applicable qualified products list (QPL) before contract award (see 6.3). 3.3 Materials. Materials shall be as specified herein, however, when a definite material is not specified, a material shall be used which will enable the connectors to meet the perf
34、ormance requirements of this specification. Acceptance or approval of any constituent material shall not be construed as a guarantee for acceptance of the finished product. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-26500G 5 3.3.1 Finish
35、. Aluminum parts other than class G connectors shall be anodic coated and sealed in accordance with MIL-A-8625 to meet the performance requirements herein. The resulting finish shall be dark gray to black in color. The finish of hermetic receptacles shall be suitable for soldering or brazing to the
36、mounting surface. The finish on class G connectors shall be such as to provide an electrically conductive path from the cable clamp screws on the plug to the receptacle mounting flange and shall meet the other requirements herein. Classes E and K stainless steel, shall be passivated in accordance wi
37、th ASTM-A967. 3.3.2 Dissimilar metals and compatible couples. When dissimilar metals are used in intimate contact with each other, protection against galvanic corrosion shall be provided. The use of dissimilar metals in contact, which tend toward active galvanic corrosion (particularly brass, copper
38、, or steel used in contact with aluminum or an aluminum alloy) is not acceptable. However, metal plating of dissimilar base metals to provide similar or suitable abutting surfaces is permitted. The use of dissimilar metals separated by a suitable insulating material is also permitted. Dissimilar met
39、als and compatible couples are specified in MIL-STD-889. 3.3.3 Pure tin. The use of pure tin, as an underplate or final finish, is prohibited both internally and externally. Tin content of connectors, their components and solder shall not exceed 97 percent, by mass. Tin shall be alloyed with a minim
40、um of 3 percent lead, by mass (see 6.8). 3.4 Design, construction, and physical dimensions. Connectors shall be of the design, construction, and physical dimensions specified (see 3.1). Connectors shall be so designed that neither the pins nor the sockets will be damaged during normal mating of coun
41、terpart connectors. Each complete plug or receptacle is an assembly of specific parts, such as: a. Body, comprising the shell, dielectric inserts, and on plugs, the coupling ring. b. Contacts, pin or socket type as specified. c. Plug end seal (except on hermetically sealed receptacles). d. Cap, prot
42、ective plastic. e. Instruction sheet (except for class H). 3.4.1 Body. The design and construction of the body portion of the plug and receptacle shall be as follows: 3.4.1.1 Shell. 3.4.1.1.1 Shell material. The shell for the plug or receptacle for classes R, F, and G shall be aluminum alloy in acco
43、rdance with SAE-AMS-QQ-A-367, SAE-AMS-QQ-A-200, or ASTM-B211. Other materials for classes R, F, and G will be permitted provided they show equal or better mechanical strength and meet the performance requirements herein. Shell material for class E shall be 300 series stainless steel. All materials s
44、hall be corrosion resistant or protected to meet the performance requirements herein. The shell material for the hermetic receptacles shall be suitable for soldering or brazing to a mounting surface of steel or aluminum alloy. 3.4.1.1.2 Shell keying. The polarizing of the mating plug and receptacles
45、 shall be accomplished by integral keys and keyways on plug and receptacle shells in accordance with MIL-STD-1554. Keys shall be designed to prevent engagement of the contacts with the mating contacts or with the insert surface of the counterpart connector until the keyways are properly aligned for
46、engagement. 3.4.1.1.3 Mating connectors. The shells and their resilient inserts shall be designed to achieve a face-to-face resilient seal, in accordance with MIL-STD-1554. Figure 1 shows typical mating characteristics for type T connectors. The seals thus provided shall be sufficient to allow engag
47、ed connectors to comply with the performance requirements specified herein. Complete mating of threaded types shall occur when the plug shell bottoms against the receptacle shell. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-26500G 6 NOTES
48、: 1. Dimensions are in inches. 2. Metric equivalents are given for information only. Millimeters are in parentheses. 3. When inserts first meet, the shells shall lack .039 inch (0.99 mm) to .011 inch (0.28 mm) of meeting. Complete mating occurs when shells meet. 4. Allow .020 inch (0.51 mm) minimum
49、clearance between insert and shell to a depth of .350 inch (8.89 mm) .050 inch (1.27 mm) back from face of insert for swelling. 5. When barriers are provided on socket insert, the insert mating line above indicates top of barriers. When barriers are not used, the socket openings of the insert shall be tapered as shown by dotted lines. FIGURE 1. Typical mating characteristics f
