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		                        | National Stock Number:
 4820-01-065-4631
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 010654631
 
 Description:
 SEAT,VALVE
 
 Detail:
 A replaceable item designed to provide a circular stationary seating surface for a mating, moveable item such as a valve disk or the like. The body may have a flange of various shapes. For diesel and gasoline reciprocating engines, see INSERT, ENGINE VALVE SEAT.
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 Manufacturer Information:
 
 | 100579-1 | 91816 | CIRCOR AEROSPACE, INC. |  | 100579-1BU | 19562 | BABCOCK AND WILCOX CO CONTROL COMPONENTS INTERNATIONAL |  | 100579-1BUCP | 03950 | NAVAL INVENTORY CONTROL POINT MECHANICSBURG |  | J100579-1CP | 03950 | NAVAL INVENTORY CONTROL POINT MECHANICSBURG |  | J100579-1 | 11243 | COSMODYNE, LLC |  | J100579-1 | 91816 | CIRCOR AEROSPACE, INC. | 
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 Techincal Specification:
 
 | CRITICALITY CODE JUSTIFICATION | ZZZY |  | REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | CLEANING, PACKAGING, AND MARKING IAW THE LATEST REVISION OF MIL-STD-1330 | 
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