Model: AC181

Spark Plug

Properties:

Body Style
Electrically shielded, full insulator, gasket seat
Dc Resistance Rating In Ohms
1500.0
Reach Length
Between 0.792 inches and 0.812 inches
Usage Design
Aircraft engine
Width Across Flats
Between 0.870 inches and 0.878 inches
Electrode Style
Two flat ground electrode
Thread Size And Series/type Designator And Location
5/8-24 unef shielding
Thread Size And Series/type Designator And Location
18-1.5mm base
Mean Effective Pressure Rating
340.0 pounds per square inch
Seat Major Diameter
0.960 inches
Height Above Mounting Surface
Between 2.188 inches and 2.312 inches
Top To Terminal Contact Distance
Between 1.000 inches and 1.070 inches
Top To Shield Thread Distance
Between 0.105 inches and 0.145 inches
Shield Thread Length
0.375 inches
Terminal Sleeve Inside Diameter
Between 0.378 inches and 0.388 inches
NSN
2925-00-142-8731
Part Number
AC181
Description
Spark Plug
CAGE
7X677

An item containing two or more electrodes across which an electric spark is discharged to ignite a fuel and air mixture, primarily in internal combustion engines. Excludes glow plug; and electrode.

Part AC181 NSN 2925-00-142-8731

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
00294
FIIG:
A10400
Concept No.:
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:
P
ESD:
ESD:
MMAC:
CRITL:
X

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Schedule B and Export
  • Schedule B: 8511100000
  • SITC: 77831
  • End Use: Engines and engine parts (carburetors, pistons, rings, and valves)
  • NAICS: 336320
  • USDA: 1

Freight Class: Spark plugs for internal combustion engines

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