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		                        | National Stock Number:
 4820-01-066-9474
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 010669474
 
 Description:
 VALVE,VACUUM BREAKING
 
 Detail:
 AN ITEM DESIGNED TO AUTOMATICALLY RELIEVE VACUUM, BY THE INTAKE OF AIR, WHEN THE INTERNAL PRESSURE FALLS BELOW ATMOSPHERIC PRESSURE. SEE ALSO VALVE, VACUUM REGULATING.
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 Manufacturer Information:
 
 | 975509-1 | 3B150 | RAYTHEON COMPANY |  | 975509-1 | 49956 | RAYTHEON COMPANY |  | P4-2628 | 91816 | CIRCOR AEROSPACE, INC. |  | P4-262B | 91816 | CIRCOR AEROSPACE, INC. | 
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 Techincal Specification:
 
 | FLOW CONTROL DEVICE | CONE |  | TEMP ADJUSTABILITY | NOT ADJUSTABLE |  | BODY STYLE | SINGLE CONNECTION, STRAIGHT FLOW |  | BODY MATERIAL | BRASS, QQ-B-626, ALLOY 360, 1/2H |  | FLOW CONTROL DEVICE MATERIAL | BRASS, QQ-B-626, ALLOY 360, 1/2H |  | END CONNECTION QUANTITY | 1 |  | FIRST END CONNECTION TYPE | THREADED EXTERNAL PIPE |  | FIRST END STYLE DESIGNATOR | PLAIN |  | FIRST END NOMINAL PIPE SIZE ACCOMMODATED | 0.250 INCHES |  | FIRST END THREAD DIRECTION | RIGHT-HAND |  | MEDIA FOR WHICH DESIGNED | ANY ACCEPTABLE |  | ABSOLUTE PRESSURE SETTING | 0.5 | 
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