INCH-POUND
A-A-52448A
April 14, 2010
SUPERSEDING
A-A-52448
7 May 1993
COMMERCIAL ITEM DESCRIPTION
COCK, PLUG: AIR SUPPLY, VEHICULAR, AIR BRAKE SYSTEM
The General Services Administration has authorized the use of this commercial item description
(CID) as a replacement for MS500046B for all federal agencies.
1. SCOPE. This CID covers one type of plug cock, which is used in the vehicular air brake
system.
2. SALIENT CHARACTERISTICS
2.1 Materials. Unless otherwise specified herein, the materials used shall be in accordance with
the manufacturer's material specifications for plug cocks. The use of recovered material made in
compliance with regulatory requirements is acceptable provided all the requirements of this CID
are met (see note d).
2.1.1 Body and plug. The body and plug shall be made from copper alloy, brass forging, or
copper alloy calling material. Forging hardness shall be in accordance with the manufacturer s
specifications/drawings. Casting condition shall be as cast.
2.1.2 Fittings and hardware. Fittings and hardware shall be zinc plated in accordance with
ASTM B633-85, Type Class SC3 (FE/Zn13).
2.2 Design and construction. Unless otherwise specified in figure 1, the plug cock shall be
designed and constructed in accordance with the manufacturer's specifications/drawings.
Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data that
may improve this document should be sent to DAMI_STANDARDIZATION@conus.army.mil or
U.S. Army RDECOM, Tank Automotive Research, Development and Engineering Center,
ATTN: RDTA-EN/STND/TRANS MS #268, 6501 E. 11 Mile Road, Warren, MI 48397-5000.
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/online.
AMSC N/A
FSC 2530
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
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