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		                             National Stock Number: 4820-01-039-3225
  Federal Supply Class: 4820
  National Item Identification Number: 010393225
  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:
 | 2177917-4-30 | 80064 | NAVAL SHIP SYSTEMS COMMAND |  | 51150N | 76364 | MILWAUKEE VALVE CO, INC |  | 803-2177917 | 53711 | NAVAL SEA SYSTEMS COMMAND |  | 803-2177917-4-02 | 53711 | NAVAL SEA SYSTEMS COMMAND |  | 810-2177917-4-02 | 53711 | NAVAL SEA SYSTEMS COMMAND |  | 803-2177917 4IN | 80064 | NAVAL SHIP SYSTEMS COMMAND |  | 84448 | 76364 | MILWAUKEE VALVE CO, INC |   
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  Techincal Specification:
 | STYLE DESIGNATOR | PLAIN THREADED |  | OVERALL HEIGHT | 0.688 INCHES NOMINAL |  | BODY INSIDE DIAMETER | 3.937 INCHES NOMINAL |  | MATERIAL | NICKEL ALLOY OVERALL |  | SURFACE TREATMENT | NICKEL SEAT |  | SEATING SURFACE SHAPE | FLAT |  | THREAD SERIES DESIGNATOR | UNS SINGLE THREADED PORTION |  | NOMINAL THREAD SIZE | 4.812 INCHES SINGLE THREADED PORTION |  | THREAD QUANTITY PER INCH | 12 SINGLE THREADED PORTION |  | THREAD CLASS | 3A SINGLE THREADED PORTION |  | THREAD LENGTH | 0.562 INCHES NOMINAL SINGLE THREADED PORTION |  | SPECIAL FEATURES | WRENCHING FACITLITY CONSISTS OF 4 SLOTS,EQUALLY SPACED,ON THE INSIDE DIAMETER,SLOTS 1/16 IN. DEEP BY 5/16 IN. WIDE |   
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