Model: 646421

Engine Poppet Valve

Properties:

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
NSN
2805-00-293-9701
Part Number
646421
Description
Valve,poppet,engine
CAGE
34623

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.

Part 646421 NSN 2805-00-293-9701

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
15884
FIIG:
A11200
Concept No.:
1
App. Key:
A
Cond. Code:
2
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
U
ESD:
ESD:
MMAC:
CRITL:
X

Packaging & Shipping

Est. Pack Size
Est. Pack Weight
Est. Item Weight
Est. Item Dim.
Pack Size:
--
Paclk Weight:
1.7000lbs
Item Weight:
--
Item Dim:
--
OPI
SPI No.
SPI Rev.
SPC Mkg.
LVL A
LVL B
OPI:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
Q
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
133300
UFC:
63220
LTL:
RATING VARIABLE
LCL:
--
WCC:
593
TCC:
Z
SHC:
9
ACC:
Trailers/Vehicles

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Schedule B and Export
  • Schedule B: 8409918000
  • SITC: 71391
  • End Use: Industrial engines
  • NAICS: 333618
  • USDA: 1

Freight Class: Parts for spark-ignition internal combustion piston engines, nesoi

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