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NSN 4820-01-125-9773

Valve Seat Insert

About this product

20.700 inches flange diameter, 13.000 inches body inside diameter, 3.250 inches under flange height, seating surface shape: flat.

Manufacturer part number 87643-7503 ITEM 3 for national stock number 4820011259773.

Datasheet

  • Product description

    Valve Seat NSN 4820-01-125-9773.

  • MPN or Model

    87643-7503 ITEM 3

  • Schedule B
    8481.90.9090 (Parts of taps, cocks, valves and similar appliances, nesoi)
  • NMF (National Motor Freight)
    050855 - Cocks R Valves Etc Bbc
  • Unit Weight (Est.)
    186 lb
  • Flange Diameter
    20.700 inches
  • Body Outside Diameter
    16.000 inches
  • Body Inside Diameter
    13.000 inches
  • Under Flange Height
    3.250 inches
  • Seating Surface Shape
    Flat
  • Material
    Bronze, nickel aluminum
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Valve Seat

A replaceable item designed to provide a 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.

Mechanic Bill explains Valve Seat Insert

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NSN 4820011259773

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
87643-7503 ITEM 3 Electric Boat Corporation
501-4675697 ITEM 3 Naval Ship Systems Command
501-4675697 Naval Ship Systems Command
87643-7503 Electric Boat Corporation
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