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Engine Poppet Valve

NSN: 2990-00-386-2907 | Model: 1F3474

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.

NSN Properties and Flags
NATO Stock Number
2990-00-386-2907
DEMIL
NO
Head Style
Flat
Head Height
0.1540 inches
Chamfer Angle In Deg
45.0
Chamfer Length
0.0312 inches
Outside Diameter
1.7500 inches
Seat Angle In Deg
45.0
Stem Style
Double grooved
Carbon Relief Groove
Not included
Neck Radius
0.3125 inches
Stem Length
6.8740 inches
Stem Diameter
0.3720 inches
Distance From First Groove To Stem End
0.3700 inches
Distance From Second Groove To Stem End
0.5250 inches
First Groove Diameter
0.3125 inches
Second Groove Diameter
0.3125 inches
First Groove Width
0.0625 inches
Second Groove Width
0.0625 inches
Material And Location
Steel
Special Features
0.095 in. Lg, 0.517 in. Diameter shoulder on stem 5.750 in. From tip end

Pricing and Availability

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NSN 2990-00-386-2907 Datasheet

Supply Class (FSC):
Nonaircraft Miscellaneous Engine Accessories
Cross Reference:
  • 1F3474
  • V1843
  • IPD1F3474
  • T1843
  • 4819
Cage Codes:
  • Caterpillar Inc. (CAGE 11083)
  • Eaton Industrial Corporation (CAGE 59875)
  • Industrial Parts Depot Inc (CAGE 55883)
  • Toledo Pickling & Steel Sales (CAGE 78557)
  • Eaton Corp Spring Div (CAGE 80900)
Identification:
HMIC

N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

PMIC

U - Precious metal content is unknown

CRITL

- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Freight Information:
  • NMFC:

    133300 - Machinery/machines noi

  • WCC:

    593 - Motors and parts, (machinery and parts),(less than 35 feet)

  • SHC:

    9 - Other or no special handling required (sh)

  • ADC:

    A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.

  • ACC:

    V - Trailers, vehicles, machinery, shop and warehouse equipment and supplies including special tools and equipment, ground servicing

  • LTL:

    W - Rating variable

  • TCC:

    Z - No special type of cargo code applicable

NSN Management Codes:
  • SOS
    S9c
  • AAC
    V
  • Quantity per pack
    1
  • Unit of Measure
    Ea
  • Shelf Life
    N/A
  • Classification Control
    U
  • MGMT_CTL
    9c--00-
  • Repariability

Questions & Answers:
What are the historical prices recorded for this stock number?
Historical data shows pricing from $47.55 to $79.25..
Does NSN 2990-00-386-2907 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Panama Canal Company, Kuwait, Republic Of Korea, Italy, Greece, and Turkey
What is the NIIN of NSN 2990-00-386-2907?
003862907 or 00-386-2907
Does NSN 2990-00-386-2907 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 2990-00-386-2907?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Jan 01, 1963