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		                        | National Stock Number:
 4820-01-245-7639
 
 Federal Supply Class:
 4820
 
 National Item Identification Number:
 012457639
 
 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:
 
 | A47638MFF | 34889 | HUNT VALVE COMPANY INC |  | A47638MFFVM | 03950 | NAVAL INVENTORY CONTROL POINT MECHANICSBURG | 
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 Techincal Specification:
 
 | REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICS | MAGNETIC PERMEABILITY SHALL NOT EXCEED 2.0 AFTER FABRICATION | 
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