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

Engine Poppet Valve

Model / MPN: 646421 | NSN: 2805-00-293-9701
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
2805-00-293-9701
Sold in multiples of
1 EA
DEMIL
NO
Head Style
Inverted cone
Head Height
0.1562 inches
Chamfer Angle In Deg
45.0
Groove Diameter
Between 0.2480 inches and 0.2520 inches
Chamfer Length
0.0312 inches
Groove Width
Between 0.3105 inches and 0.3145 inches
Outside Diameter
2.0000 inches
Seat Angle In Deg
45.0
Stem Style
Grooved
Carbon Relief Groove
Not included
Neck Radius
0.7500 inches
Stem Length
4.6250 inches
Stem Diameter
Between 0.3733 inches and 0.3738 inches
Distance From Groove To Stem End
0.1875 inches
Material And Location
Steel, federal standard 66, aisi/sae 5150
Metallic Hardness Rating And Location
52.0 rockwell c tip
Fsc Application Data
Gasoline engine
64642 Series Parts

Pricing and Availability

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646421 Cross Reference
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  • V1353
  • 8329697
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  • I-302
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