1、 INCH-POUND MIL-DTL-2726C 14 February 2006SUPERSEDING MIL-R-2726B(SH) 3 July 1986 DETAIL SPECIFICATION RECEPTACLE, RECEPTACLE PLUGS, SWITCH AND RECEPTACLES, AND OUTLETS (ELECTRICAL), GENERAL SPECIFICATION FOR MIL-DTL-2726C, dated 3 July 1986, is hereby reactivated and may be used for either new or e
2、xisting design acquisition. This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers the general requirements for power type electrical plugs, receptacles, switch and receptacle combinations, and outlets for us
3、e in direct current (dc) circuits up to 250 volts, or in alternating current (ac) circuits up to 600 volts at frequencies up to and including 400 Hz. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4 and 5 of this specification. This section doe
4、s 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 specified requirements documents cited in sec
5、tion 3, 4 and 5 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 herein. Unless otherwise specified, the issues
6、of these documents are those cited in the solicitation or contract (see 6.2). FEDERAL SPECIFICATIONS TT-P-645 - Primer, Paint, Zinc Chromate, Alkyd Type. W-C-596 - Connector, Electrical, Power, General Specification for. Comments, suggestions, or questions on this document should be addressed to: De
7、fense Supply Center, Columbus, Attn: DSCC-VAI, P.O. Box 3990, Columbus, OH, 43218-3990 or emailed: CircularConnectordscc.dla.mil. Since contact information can change, you may want to verify the currency of this address information using the ASSIST Online database at http:/assist.daps.dla.milAMSC N/
8、A FSC 5935 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-2726C 2FEDERAL STANDARDS FED-STD-H28 - Screw-Thread Standards for Federal Services FED-STD-H28/2 - Unified Threads of Special Diameters, Pitches, and Lengths of Engagement COMMERCIAL
9、ITEM DESCRIPTIONS A-A-59142 - Rosins: Gum, Wood, and Tall Oil DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-C-21567 - Compound, Silicone, Soft Film MIL-DTL-15024 - Plates, Tags and Bands for Identification of Equipment MIL-DTL-16377 - Fixtures, Lighting; and Associated Parts; Shipboard Use, General Speci
10、fication for MIL-DTL-3950 - Switch, Toggle, Environmentally Sealed General Specification for MIL-DTL-5423 - Boots, Dust and Water Seal (For Toggle and Push-Button Switches, Circuit Breakers, and Rotary-Actuated Parts), General Specification for MIL-DTL-5423/2 - Boot, Dust and Water Seal, Type A (For
11、 Toggle Switches), Style 3 (One-Hole Mounting, Through) MIL-E-24142 - Enclosures for Electrical Fittings and Fixtures, General Specification for MIL-E-917 - Electric Power Equipment, Basic Requirements (Naval Shipboard Use) MIL-I-24768/1 - Plastic Sheet, Laminated, Thermosetting, Glass-Cloth, Melami
12、ne-Resin MIL-P-15024/5 - Plate, Identification MIL-PRF-900 - Rubber Gasket Material, Durometer Hardness 45 MIL-DTL-15291 - Switches, Rotary, Snap Action and Detent/Spring Return Action, General Specification for MIL-S-901 - Shock Tests, H. I. (High Impact); Shipboard Machinery, Equipment and Systems
13、, Requirements for (See supplement 1 for list of specification sheets.) DEPARTMENT OF DEFENSE STANDARDS MIL-STD-108 - Definitions of and Basic Requirements for Enclosures for Electric and Electronic Equipment MIL-STD-167-1 - Mechanical Vibrations of Shipboard Equipment (Type I - Environmental and Ty
14、pe II - Internally Excited) MIL-STD-1760 Aircraft/Store Electrical Interconnection System MIL-STD-1916 - DoD Preferred Methods for Acceptance of Product MIL-STD-202 - Test Methods for Electronic and Electrical Component Parts MIL-STD-810 - Environmental Engineering Considerations and Laboratory Test
15、s (Copies of these documents are available online at http:/assist.daps.dla.mil or http:/assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094.) Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
16、ense from IHS-,-,-MIL-DTL-2726C 3DEPARTMENT OF DEFENSE HANDBOOKS MIL-HDBK-454 - GENERAL GUIDELINES FOR ELECTRONIC EQUIPMENT (Copies of these documents are available online at http:/assist.daps.dla.mil/quicksearch/ or http:/assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robb
17、ins 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 issues of these documents are those cited in the solicitation or contract. AMERICAN NATIONAL ST
18、ANDARDS INSTITUTE (ANSI) ANSI/AWS D1.1 - Structural Welding Code Steel. (Copies of these documents are available online from http:/www.ansi.org or from the American National Standard Institute, 25 West 43 Street, 4thFloor, New York, NY 10036.) ASTM INTERNATIONAL ASTM-A342/A342M - Materials, Feebly M
19、agnetic, Permeability of, Standard Test Methods for ASTM-B133 - Copper Rod, Bar, and Shapes. (Metric) ASTM-B187/B187M - Copper, Bus Bar, Rod, and Shapes and General Purpose Rod, Bar, and Shapes ASTM-B209 - Aluminum and Aluminum-Alloy Sheet and Plate. ASTM-B221 - Aluminum and Aluminum-Alloy Extruded
20、Bars, Rods, Wire, Profiles, and Tubes ASTM-B26/B26M - Aluminum-Alloy Sand Castings ASTM-B3 - Copper Wire, Soft or Annealed ASTM-B49 - Copper Rod Drawing Stock for Electrical Purposes ASTM-B633 - Zinc on Iron and Steel, Electrodeposited Coatings of ASTM-B700 - Silver Plating, Electrodeposited, Genera
21、l Requirements for ASTM-D2000 - Rubber Products in Automotive Applications ASTM-D295 - Cotton Fabrics, Varnished. Used for Electrical Insulation ASTM-D3935 - Material, Polycarbonate (PC) Unfilled and Reinforced ASTM-D4066 - Nylon Injection and Extrusion Materials (PA) ASTM-D5948 - Compounds, Molding
22、, Thermosetting ASTM-E-18 - Materials, Metallic, Rockwell Hardness and Rockwell Superficial Hardness of ASTM-F1836M - Tubes, Stuffing, Nylon, and Packing Assemblies (Copies of these documents are available online at http:/www.astm.org or from the American Society for Testing and Materials, P.O. Box
23、C700, 100 Barr Harbor Drive, Conshohocken, PA 19428-2959). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-2726C 4ELECTRONIC INDUSTRIES ASSOCIATION (EIA) EIA-364 - Test Methods for Electrical Connectors. EIA-364-06 - Contact Resistance Test P
24、rocedure for Electrical Connectors EIA-364-09 - Durability Test Procedure for Electrical Connectors and Contacts EIA-364-20 - Withstanding Voltage Test Procedure for Electrical Connectors, Sockets and Coaxial Contacts EIA-364-21 - Insulation Resistance Test Procedure for Electrical Connectors, Socke
25、ts, and Coaxial Contacts EIA-364-42 - Impact Test Procedure for Electrical Connectors (Copies of these documents are available online at http:/www.eia.org or from the Electronic Industries Alliance, Technology Strategy however, it may be used in manufacturing, or test processes for materials and par
26、ts provided that, in such use, no contamination of the delivered materials or parts can result. g. Asbestos. f. Cadmium. 3.3.2 Fungus resistant. Materials used in the construction of these connectors shall be fungus inert and in accordance with MIL-HDBK-454 Guideline 4 (see 4.8). 3.3.3 Arc-resistant
27、 materials. Arc-resistant materials shall be in accordance with MIL-HDBK-454 Guideline 26. 3.3.4 Metals. Metals shall be selected or processed and applied in a manner that provides corrosion resistance. Metals that are not inherently corrosion resistant (see 3.3.4.2) shall be processed (treated, pla
28、ted or painted) to provide corrosion resistance. 3.3.4.1 Selection of metals in direct contact. To minimize corrosion attack due to electrolytic action between dissimilar metals in contact with each other, metal-to-metal contacts shall be limited to those metals which, when coupled, are in accordanc
29、e with MIL-E-917. 3.3.4.2 Corrosion-resisting metals. The following commonly used metals when properly applied are considered to be inherently corrosion resistant without further processing: a. Brass b. Bronze c. Copper d. Copper-nickel alloy e. Copper-beryllium alloy f. Copper-nickel-zinc alloy g.
30、Nickel-copper alloy h. Nickel-copper silicon alloy I. Nickel-copper-aluminum alloy j. Austenitic steels, AISI types 202, 302, 303, 304, 304L, 309, 310, 316, 316L, 321, 324A, 347. 3.3.4.3 Aluminum. Aluminum alloys, including castings, shall be in accordance with ASTM-B26/B26M, ASTM-B209 and ASTM-B221
31、, as applicable. 3.3.4.4 Copper and copper alloys. Unless otherwise specified (see 3.1), all current-carrying parts and wire binding screws and lugs shall be copper or copper alloy in accordance with ASTM-B3, ASTM-B49, ASTM-B133, and ASTM-B187/B187M (as applicable). 3.3.4.5 Nonferrous material (exce
32、pt aluminum). Unless otherwise specified (see 3.1), nonferrous materials, except aluminum, shall be in accordance with commercial standards. 3.3.5 Laminated insulating material. Laminated plastic insulating material shall be a glass cloth bonding with melamine resin, in accordance with MIL-I-24768/1
33、 type GME. 3.3.6 Thermosetting insulating material. Thermosetting, molded insulating parts shall be in accordance with ASTM-D5948 type MAI-30 or type MMI-30. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-2726C 63.3.7 Thermoplastics. Thermop
34、lastic materials for molding noninsulating parts (including shells, caps handles, and similar items) shall be polyamide (nylon) in accordance with ASTM-D4066 or polycarbonate in accordance with ASTM-D3935. 3.3.8 Nonmagnetic materials. When specified (see 3.1), enclosures and installed parts shall be
35、 of a nonferrous material or a material generally considered nonmagnetic. 3.3.9 Rubber compounds. Rubber compounds and compositions shall be in accordance with ASTM-D2000 or MIL-PRF-900. The compound grade shall be as specified in the applicable specification sheet. 3.3.10 Recovered materials. Unles
36、s otherwise specified herein, all material and articles incorporated in the products covered by this specification shall be new and may be fabricated using materials produced from recovered materials to the maximum extent practicable without jeopardizing the intended use. The term “recovered materia
37、ls” means materials which have been collected or recovered from solid waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean that the use of used or rebuilt products is allowed under this specification unless othe
38、rwise specifically specified. 3.3.10.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, an
39、d promotes economically advantageous life cycle costs. 3.4 Design and construction. Plugs, receptacles, switch and receptacle combinations, and outlets shall conform to the design, construction, and physical dimensions specified herein and in the applicable specification sheets. The dimensions shown
40、 are after all plating and finish is applied. 3.4.1 Castings. Castings shall be free from cold shuts, blow holes or any imperfections that may affect strength. Surfaces of castings shall have burrs and fins removed. 3.4.2 Molded parts. Molded parts shall be free of sinks or bubbles, streaking, charr
41、ed areas, flow lines and incomplete fill. Flash shall be removed from molded parts and the width of the flash edges made thereby shall be not greater than .031 inch. Flash edges shall be buffed smooth. For parts thermosetting material, buffed or cut areas shall be given two coats of varnish in accor
42、dance with ASTM-D295. For parts of thermoplastic material, no treatment is necessary unless a filled thermoplastic material is used; then the treatment is the same as for thermosetting material. 3.4.2.1 Polyamide (nylon) parts. Molded polyamide (nylon) parts shall be in accordance with ASTM-D4066, g
43、roup 1, class 8, grade 1. 3.4.2.2 Polycarbonate parts. Moisture content of the polycarbonate material prior to molding shall be controlled as specified by the manufacturer of the material. Processing and molding techniques of the material manufacturer shall be followed. 3.4.2.3 Stress relief. Measur
44、es shall be taken in molding or processing plastic to ensure that stress build-up does not occur or is satisfactorily treated to relieve these stresses to prevent deterioration or failure of a part or assembly. The stress-relieving process shall be as recommended by the contractor of the raw materia
45、l. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-2726C 73.4.2.4 Molded assemblies. Molded assemblies shall have the manufacturers name or identification and part number molded in a visible location. Phase, polarity or pin number markings sh
46、all be molded on both sides as indicated in the applicable specification sheet. Molded assemblies and parts may be marked with the applicable superseded drawing where the molds have been built with identification markings of the superseded drawing, except that the marking of this specification shall
47、 be used when the molds require reworking or replacing. In addition, when complete assemblies have molded superseded assembly identification, the assembly identification as specified in the applicable specification sheet shall be indelibly marked on the assembly. 3.4.3 Contacts. Unless otherwise spe
48、cified (see 3.1), material for contacts (male and female) shall be copper or copper alloy, having the Rockwell hardness specified in the applicable specification sheet. Contacts shall incorporate an anti-rotational device to prevent turning of the contact in its respective plug or receptacle assembl
49、y. Contact terminals shall be of the solder or pressure grip type. Binding head screws may be used on bladed contacts. Female contacts shall be designed to ensure a good electrical connection throughout their length by crimping the contact end or by the use of a spring clip. Contacts shall be designed for ease of ins
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