1、MIL-C-38271B b 1995345 119 W I INCH-POUNDI MIL-C-38271B (USAF) 04 November 1994 SUPERSEDING 11 March 1968 MIL-C-38271A (USAF) MILITARY SPECIFICATION CONNECTOR, OXYGEN MASK TO REGULATOR CRUGOP This specification is approved for use by the Department of the Air Force and is available for use by all De
2、partments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scow. This specification covers one type of connector for connecting aircr,?ft-panel-mounted oxygen regulator delivery tube and emergency o,ygen cylinder assemblies to the oxygen demand brezithing mask. The connector is designated Typ
3、e CRUGOP. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Smcifications and standards. The following specifications and standards form a pirt of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Depart
4、ment of Defense Index for Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). SPECIFICATIONS FEDERAL BB-A-1034 Compressed Air, BrGithing BB-N-4 1 1 Nitrogen, technical MILITARY MIL-P-116 Preservalion, Methods Of MIL-C-5040 Cord, Fibrous, Nylon MIL-W-685
5、8 MIL-S-7742 MIL-A-8625 MIL0272 10 MIL-T-3 1000 Welding, Resistance. Spot and SGim Scrcw Threads, Skmdard, Optimum Selected Series, General Specification For Anodic Coatings, For Aluminum And Aluminum Alloys Oqgcn, Aviators Breathing, Liquid And Gas Technical Daia Packages, General Specification For
6、 Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use improving this document should be addressed to: Technology and Industrial Services Division, SA-ALCEILDD, 485 Quentin Roosevelt Rd. Kelly AFB, TX 782416425 by using the Standardization Document Im
7、provement Proposil D Form 1426) appearing at the end of this document or by lclter. AMSC N/A FSC 1660 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Licensed by Information Handling ServicesProvided by IHSNot for ResaleNo reproduction or networking permitted withou
8、t license from IHS-,-,-flIL-C-3827LB = Ob L534b 055 m MIL-C-38271B (USAF) STANDARDS FEDERAL FED-STD-595 FED-STD-60 1 MILITARY MIL-STD- 130 MIL-STD-470 MIL-STD-47 1 MIL-STD-756 MIL-STD-78 1 MIL-STD-889 MIL-STD-970 MIL-STD-2 175 MIL-STD-22 19 MS22055 MS22058 MS27796 MS21964 Colors Used In Government P
9、rocurement Rubber: Sampling And Testing U.S. Military Property, Identification Marking Of Maintainability Program For Systems and Equipments Maintainability Verification/Demonstratiovaltion Reliability Modeling And Prediction Reliability Testing For Engineering Development, Qualification, And Dissim
10、ilar Metals Standards and Specifications. Order of Precedence for the Selection of Castings, Classification And Inspection of Fusion Welding For Aerospace Applications Hose Assemblies-xygen Breathing Connector To Regulator Connector, Oxygen Hose To Regulator Connector-Bayonet, Three Pin, Oxygen Mask
11、 Valve Assembly, Emergency Oxygen Cylinder Production (Unless otherwise indicated, copies of federal and military specifications, and standards are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Ave, Philadelphia, PA 191 11-5094) 2.1.2 Other Government documents. d
12、rawings. and publications. The following other Government documents, drawings, and publications form a patt of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. DRAWINGS AIR FORCE 44A23992 44A23994 45A 19096 45A19097 45A19099 56
13、A3696 57B3623 57B3657 Check-xygen Emergency Cylinder, To Demand Mask, Adapter Sleeve-xygen Emergency Cylinder, To Demand Mask, Adapter Gasket-Coupling, Connector, Oxygen Coupling-Connector, Oxygen Washer-Sleeve, Connector, Oxygen Gasket-Connector, Oxygen Ring-Retaining, Demand Mask To Regulator Tube
14、 Internal Plate-Mounting Oxygen Mask To Regulator, Female Assembly Of (Applications for copies should be addressed to SA-ALCKILDD, Kelly AFB, TX 7824 1-5000) 2.1.2 Other Government documents. drawings. and Dubiications. The following other Government documents, drawings, and publications form a part
15、 of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. 7944858 Cleaning and Marking Instnictions for Life Support Oxygen Breathing Devices and Components (Applications for copies should be addressed to SA-ALULGTPL, Kelly AFi3, TX
16、 7824 1-5000) c 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-3827LB 9999906 1935347 T9L MIL-C-38271B (USAF) 2.2 -. The following document forms a part of this document to the extent specified herein. Unless otherwise specified, the issues
17、of the documents which are DOD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). American Society Of Mechanical Engineers (AS
18、ME) ASME B 46.1 Surface Texture (Surface Roughness, Waviness And Lay) (Application for copies should be addressed to the American Society of Mechanical Engineers, 345 Easi 47th Street, New York, NY 10017) American Society For Testing And Materials (ASTM) ASTM B633 ASTh4 DI 149 ASTM D 1974 ASTM F104
19、ASTM D5 1 18D5 I 18M Standard Specification For Electrodeposited Coatings Of Zinc On Iron And Standard Test Method For Rubber Deterioration - Surface Ozone Cracking In Standard Practice for Methods of Closing, Sealing, and Reinforcing Fiberboard Standard Classification System For Nonmetallic Gasket
20、Materials Standard Practice for Fabrication of Fiberboard Shipping Boxes Steel A Chamber Shipping Containers (Application for copies should be addressed to the American Society For Testing Materials, 1916 Race St, Philadelphia, PA 19103-1 187) Society of Automotive Engineers SAE AMs 2417 Nickel Zinc
21、 Alloy Plating (Application for copies should be addressed to the Society Of Automotive Engineers, Inc., 400 Commonwealth Drive, Warrendale, PA 15096-0001) (Non-Govenunent standards and other publications are normally available from the organizations that prepare or distribute the documents. These d
22、ocuments also may be available in or through libraries or other informational services. 2.3 Order of Precedence. In the event of a conflict between the text of this document and the references cited herein (except for related associated detail specifications, specification sheets, or MS slandards),
23、the text of this documents takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Qualification. The connector furnished under this specification shall be products which are authorized by the
24、qualifying activity for listing on the applicable qualified products list at the time set for opening of bids (see 4.4 and 6.3). 3.2 Selection of suecification and standards. Specifications and standards for necessary commodities and services not specified herein shall be selected in accordance with
25、 MIL-STD-970. 3.3 Metals. Metals shall be of the corrosioii-resistant type or suitably treated to resist corrosion due to fuels, salt spray, or any atmospheric conditions likely to be met in storage or normal service. Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
26、se from IHS-,-,-MIL-C-3827LB = 9999906 3995348 928 MIL-C-3827 1B (USAF) 3.3.1 Dissimilar metals. Unless suitably protected against electrolytic corrosion, dissimilar metais shall not be used in intimate contact with each other. Dissimilar metals are defined in MIL-STD-889. 3.3.2 Nonmametic materials
27、. Except where magnetic materials offer definite advantages, nonmagnetic materiais shall be used for all components. 3.3.3 Nonmetallic niaterials. The use of nonmetallic materials shall require the approval of the procuring activity for the specific application involved. 3.3.3.1 NeoDrene rubber. Neo
28、prene rubber that has been formulated and processed to meet the requirements of this specification shall be used for any connector tubing. It shall be smooth and free of flash, foreign materials, tackiness, odors, or any other imperfections. The material shall have the following properties: a. Tensi
29、le strength - 1500 psi min. b. Tear resistance - 230 pounds per inch. c. Ozone resistance. d. Brittle point - (-40“ F min). 3.3.4 Funms-resistant materials. Materials that are not susceptible to fungus attack shall be used to the greatest extent possible. If niaterials that are susceptible to fungus
30、 attack are used, they shall be treated with a fungicidal agent. 3.3.4.1 Reclaimed materials. The use of reclaimed materiais shall be encouraged to the maximum extent possible. 3.3.5 Protective treatnient. If niaterials that are subject to deterioration when exposed to climatic and environmenkli con
31、ditions likely to occur during service usage are used in the construction of the connector, they shall be protected against such deterioration in a manner that will in no way prevent compliance with the performance requirements of this specification. The use of any protective coating that will crack
32、, chip or scale with age or extreme climatic or environmental conditions shall be avoided. 3.3.5.1 Anodizing. All aluminum parts shall be anodized in accordance wiih type II, class 2, color black, of MIL-A-8625. All exposed parts shall be processed after anodizing with a potassium dichromate seai. 3
33、.3.5.2 Nickel zinc dating. Unless made of corrosion resisting steel, ali steel parts shall be protected in accordance with AMs 2417 or ASTM B633. Cadmium coating or plating shall no1 be used, as it is a toxic material unacceptable for use in an oxygen breathing system. 3.3.6 Weight. The materials us
34、ed in the construction of the components of the connector shall be made of the lightest possible materials consistent with configuration, strength, and ail other requirements specified herein. 3.3.7 Elastomers. All elastomers shall be free from foreign agents that might cause objectionable odors. Al
35、l elastomers used in the construction of the connector shall have been manufactured not more than 12 months before the date the connector is manufactured. if there is sunicient area, the cure date (quarter and year) shall be stamped in O. 1875 inch figures on the elastomer component. Cure dates and
36、age limitations shall not apply to silicone. 3.4 Desim. The design of the connector shall conform to figures 1 through 7. The aircraft supply port, see figure 7, shall be designed to flex or swivel, with respect to the connector housing, see figure 2, to facilitate separation of the mating connectio
37、n assembly MS22058-2 when it is subjected to angular forces up to 180 to the longitudinal axis of the connector. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-382iLB = 0b I1795349 864 H MIL-C-38271B (USAF) 3.4.1 Aircraft SUDDV rt. The aircr
38、aft supply port of the connector shall have a restrictor valve that will permit the user to breathe normally up through the connector when the restrictor valve is inserted into a connector conforming to MS22058. The restrictor valve shall be guided internally to prevent tilting of the valve mechanis
39、m. The guide shall not cause jamming of the valve. The valve actuator shall be positively locked to the restrictor valve. When disconnected, the valve shall permit inhalation, but a noticeable resistance shall be introduced to indicate that disconnection has occurred. The body of the connector shall
40、 contain a spring-loaded relief valve that is adjusted to allow oxygen from the bailout cylinder to escape whenever the mask pressure exceeds a pressure equal to 12 inches of water more than ambient pressure. The relief valve may vent small flows before the mask pressure reaches 12 inches of water m
41、ore than ambient pressure. Two slots located on opposite sides of the supply connector shall accommodate the valve actuator (see figure 7). The length of the slots shall be determined by the travel of the valve. The male end housing shall be an all metal one piece construction. 3.4.2 Bailout SUDDY a
42、ttachment. The side bailout supply attachment shall be designed to engage the type MS21964-20 connector and shall contain a check valve that conforms to figure 2. The bailout supply port shall be instailed on the connector so that it can be rotated freely and does not leak. A locking mechanism withi
43、n the connector housing shall provide positive means for retaining the attachment on the connector. Rotation of the connector shall not create or cause shavings within the housing. 3.4.3 Alignment. The alignment of fitting and mating surfaces shall be accurate to a degree that will permit the proper
44、 functioning of the unit in the environmental conditions expected to be encountered during the service life of the unit. 3.5 Construction. The connector shall be constructed so that no parts will become loose in service. It shall be built to withstand the strains, jars, vibrations, and any other con
45、ditions incident to shipment, Storage installation and service. 3.5.1 Dovetail mountinp flanne. The connector shall have a male dovetail flange conforming to figures 1,2, 3, and 4. The flange shall have a manual lock and release that shall be readily accessible for use. 3.5.2 Omnidirectional aircraf
46、t suDPlv wrt. If neoprene-rubber tubing is used to connect the aircraft supply port to the connector housing, it shall be constructed as specified (see 3.5.2. I). 3.5.2.1 NeoDrene-rubber tubing. The tubing shall be constructed of neoprene rubber that will meet the performance requirements specified
47、herein. The tubing shall be attached at each end by a hose clamp conforming to Scott Aviation Part No 266632 or equal. To limit the stretch of the tube, a nylon cord, 100 pound test type IA in accordance with MIL-C-5040 shall be used inside the tube between the hose end fittings. The cord shall be d
48、esigned to prevent gouging or cutting of the tube or excessive wear of the cord or the cord attachments points. When the aircraft supply connector is subjected to lateral or torsional movement, the tubing shall not crimp, collapse, or be pinched between the cord and the supply port or connector body
49、. The flexible cord inside the tube shall be attached to the body and aircra supply port in such a manner to permit easy removal and replacement of the hose without special tools. 3.5.2.2. Neoprene rubber cover. A neoprene rubber cover, 0.625 inches wide, made of the same material as the hose shall be installed over the clamp at the connector housing of the tubing. The rubber covers shall have a tight fit to prevent slippage. 3.5.3 Welding. Welding shall be accomplished in acc
