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

Engine Poppet Valve

Model / MPN: 138874 | NSN: 2810-00-306-5846
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
2810-00-306-5846
Sold in multiples of
DEMIL
NO
Head Style
Mushroom
Head Height
0.4750 inches
Chamfer Angle In Deg
45.0
Groove Diameter
Between 0.6340 inches and 0.6360 inches
Chamfer Length
0.0200 inches
Groove Width
0.2670 inches
Outside Diameter
Between 3.2950 inches and 3.3050 inches
Seat Angle In Deg
37.0
Stem Style
Grooved
Carbon Relief Groove
Not included
Neck Radius
1.4400 inches
Stem Length
Between 5.4260 inches and 5.4360 inches
Stem Diameter
Between 0.6835 inches and 0.6840 inches
Distance From Groove To Stem End
Between 0.2230 inches and 0.2430 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
Aircraft eng r1300
13887 Series Parts

Pricing and Availability

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138874 Cross Reference
  • 128895