Model: C657

Engine Poppet Valve

Properties:

Head Style
Flat
Head Height
0.1719 inches
Chamfer Angle In Deg
45.0
Chamfer Length
0.0312 inches
Taper Angle In Deg
15.0
Outside Diameter
Between 1.2450 inches and 1.2550 inches
Minor Outside Diameter
Between 0.1960 inches and 0.2000 inches
Minor Diameter Length
0.0940 inches
Seat Angle In Deg
45.0
Stem Style
Tapered
Carbon Relief Groove
Not included
Neck Radius
0.2500 inches
Stem Length
Between 4.5319 inches and 4.5460 inches
Stem Diameter
Between 0.3080 inches and 0.3090 inches
Distance From Minor Diameter To Stem End
Between 0.1740 inches and 0.1760 inches
Material And Location
Steel, federal standard 66, aisi/sae 8645 head
Material And Location
Steel, federal standard 66, aisi/sae 8645 stem
Material And Location
Steel, federal standard 66, sae vf2 seat face
Metallic Hardness Rating And Location
43.0 shore scleroscope tip
Fsc Application Data
Gasoline engine
NSN
2805-00-353-5830
Part Number
C657
Description
Valve,poppet,engine
CAGE
80900

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 C657 NSN 2805-00-353-5830

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

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
133300
UFC:
63220
LTL:
RATING VARIABLE
LCL:
85.0
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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