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Engine Poppet Valve

Model / MPN: 170291 | NSN: 2810-00-505-9087
ITAR Registered seal

A mushroom or tulip-shaped item having a circular head with a conical face and an extended stem used to regulate the flow of incoming fuel-air mixture or air into the combustion chamber or exhaust gases from the combustion chamber of a reciprocating internal combustion engine.

Product Details
NATO Stock Number
2810-00-505-9087
Sold in multiples of
DEMIL
NO
Head Style
Mushroom
Head Height
0.4750 inches
Chamfer Angle In Deg
45.0
Groove Diameter
0.6350 inches
Chamfer Length
0.0200 inches
Groove Width
0.2840 inches
Outside Diameter
3.3000 inches
Seat Angle In Deg
37.0
Stem Style
Grooved
Carbon Relief Groove
Not included
Neck Radius
0.7200 inches
Stem Length
Between 5.4260 inches and 5.4360 inches
Stem Diameter
Between 0.7455 inches and 0.7460 inches
Distance From Groove To Stem End
0.0900 inches
Material And Location
Sodium internal filling
Material And Location
Steel head
Material And Location
Steel stem
Metallic Hardness Rating And Location
54.0 rockwell c tip
Fsc Application Data
Gasoline engine aircraft
17029 Series Parts

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170291 Cross Reference