A-A-52531 Kingpin, Fifth Wheel, 2 Inch And 3.5 Inch, UniversalThis CID covers the requirements for a universal kingpin used in coupling military trailer to a truck-tractor or a trailer converter dolly fifth wheel. It also includes the requirements for kingpins used in trailers when transported on flat cars.

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A-A-52531

6.1 Addresses for obtaining referenced documents.

6.1.1 Government publications. Copies of “The Code of Federal Regulations (CFR)” are available from the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.

6.1.2 Non-Government publications. Copies of SAE J133 “Fifth Wheel Kingpin Performance-Commercial Trailers and Semitrailers”, SAE J700 “Upper Coupler Kingpin- Commercial Trailers and Semitrailers”, and SAE J848 “Fifth Wheel Kingpin, Heavy Duty Commercial Trailers and Semitrailers” are available from the Society of Automotive Engineers (SAE), 400 Commonwealth Drive, Warrendale, PA 15096. Association of American Railroads document M931-88 “Highway Trailers, All Types, for TOFC Service” is available from the Association of American Railroads (AAR), 50 F Street, N.W., Washington, DC 20001. Copies of ANSI/ASME B46.1 “Surface Texture (Surface Roughness, Waviness, and Lay)” are available from The American National Standards Institute, 11 West 42nd Street, New York, NY 10036.

6.2 Ordering data. Acquisition documents must specify the following:

a. Title, number, and date of this CID.

b. Issue of Department of Defense Index of Specifications and Standards (DODISS) to be cited in the solicitation, and if required, the specific issue of individual documents referenced.

c. PIN.

d. Selection of applicable level and packaging requirements.

6.3 Associated fifth wheels. See MS53034 for associated fifth wheel used with this kingpin.

6.3.1 Associated socket. See CID A-A-52532 for associated socket used with this kingpin.

6.4 Cross-reference data. Kingpins conforming to this CID are interchangeable/substitutable with kingpins conforming to MS53038-1.

6.5 International standardization agreement. Certain provisions of this specification (see figure 1) are the subject of international standardization agreement QSTAG 284 and NATO-STANAG 4009. When amendment, revision, or cancellation of this specification is proposed that will modify the international agreement concerned, the preparing activity will take appropriate action through international standardization channels, including departmental standardization offices, to change the agreement or make other appropriate accommodations.