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Worldwide distributor of NSN parts and consumables located in the USA.

Valve Seat

Model / MPN: 6859371 | NSN: 4820-01-104-6770
ITAR Registered seal

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.

Product Details
NATO Stock Number
4820-01-104-6770
Sold in multiples of
1 EA
DEMIL
NO
Flange Diameter
Between 1.122 inches and 1.123 inches
Body Outside Diameter
Between 1.008 inches and 1.012 inches
End Application
T-56 engine
Seat Radius
Between 0.030 inches and 0.040 inches
Flange Seat To Disk End Height
0.259 inches
Under Flange Height
Between 0.165 inches and 0.170 inches
Hardness Rating
32.0 rockwell c and 36.0 rockwell c
Seating Surface Shape
Radial
Body Stepped Inside Diameter
0.500 inches first step and 0.505 inches first step
Body Stepped Inside Diameter
0.978 inches third step and 0.983 inches third step
Body Stepped Inside Diameter
0.920 inches second step
Material
Steel
Style Designator
Plain flanged
68593 Series Parts

Pricing and Availability

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6859371 Cross Reference
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