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NSN 4820-00-397-9527

Valve Seat Insert

About this product

1.720 inches body inside diameter, 0.250 inches seat radius, 80.0 rockwell b and 100.0 rockwell b hardness rating, seating surface shape: radial.

Manufacturer part number 61258P20 for national stock number 4820003979527.

Datasheet

  • Product description

    Valve Seat NSN 4820-00-397-9527.

  • MPN or Model

    61258P20

  • Schedule B
    8481.90.9090 (Parts of taps, cocks, valves and similar appliances, nesoi)
  • Overall Height
    Between 0.409 inches and 0.414 inches
  • Body Outside Diameter
    2.117 inches
  • Body Inside Diameter
    1.720 inches
  • Seat Radius
    0.250 inches
  • Hardness Rating
    80.0 rockwell b and 100.0 rockwell b
  • Seating Surface Shape
    Radial
  • Material
    Copper alloy 614
  • Style Designator
    Plain
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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 4820003979527

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Manufacturer Part Numbers and Alternates
MPN manufacturer part number Registrant or Supplier
61258P20 Textron Lycoming Inc
60645P20 Textron Lycoming Inc
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