NSN 4820-00-739-1777
Valve Seat Insert
About this product
Between 1.175 inches and 1.180 inches flange diameter, 0.630 inches body inside diameter, between 0.440 inches and 0.445 inches flange seat to disk end height, under flange height: between 0.495 inches and 0.500 inches .
Manufacturer part number 66-4908 for national stock number 4820007391777.
Datasheet
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Product description
Valve Seat NSN 4820-00-739-1777.
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MPN or Model
66-4908
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Schedule B
8481.90.9090 (Parts of taps, cocks, valves and similar appliances, nesoi) -
NMF (National Motor Freight)
133300 - Machinery/machines NOI -
Flange Diameter
Between 1.175 inches and 1.180 inches -
Body Outside Diameter
0.750 inches -
Body Inside Diameter
0.630 inches -
Flange Seat To Disk End Height
Between 0.440 inches and 0.445 inches -
Under Flange Height
Between 0.495 inches and 0.500 inches -
Seal Accommodation Type
Grooved -
Hardness Rating
27.0 rockwell c and 33.0 rockwell c -
Seating Surface Shape
Flat -
Material
Steel comp 4130 -
Material Specification
Mil-s-6758 military specification single material response -
Style Designator
Plain flanged
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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](/public/images/billy-thinking.png)
Pricing and Availability
Get a quote for 4820-00-739-1777 valve seatManufacturer Part Numbers and Alternates
MPN manufacturer part number | Registrant or Supplier |
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66-4908 | The Boeing Company |
Stock Check
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