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		                        | National Stock Number:
 4820-00-138-2079
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 001382079
 
 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:
 
 | 2640-801X1PC20 | 96169 | ELECTRIC BOAT CORPORATION |  | 2643-820-86 ITEM 10 | 96169 | ELECTRIC BOAT CORPORATION |  | 845-7284928 ITEM 10 | 53711 | NAVAL SEA SYSTEMS COMMAND | 
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 Techincal Specification:
 
 | STYLE DESIGNATOR | PLAIN |  | OVERALL HEIGHT | 0.375 INCHES NOMINAL |  | BODY OUTSIDE DIAMETER | 2.938 INCHES NOMINAL |  | BODY INSIDE DIAMETER | 1.938 INCHES NOMINAL |  | MATERIAL | PLASTIC ACETAL OVERALL |  | SEATING SURFACE SHAPE | ANGULAR |  | SEAT ANGLE IN DEG | 30.000 NOMINAL | 
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