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AR8S ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The SPARK PLUG is a the manufacturer industrial component. Key specifications include body_style: ELECTRICALLY SHIELDED, FULL INSULATOR, GASKET SEAT, reach_length: 0.375 INCHES NOMINAL IN, usage_design: ENGINE OTHER THAN AIRCRAFT, electrode_style: SINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4), pressure_rating: 140.0 POUNDS PER SQUARE INCH (PSI) NOMINAL MEAN EFFECTIVE LBS, width_across_flats: 0.812 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2920-00-294-3746, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
AR8S
NSN: 2920-00-294-3746
FSC: 2920
CAGE: 95689 — WOODSTOCK DIE CASTING AN ELTRA CO (USA)
SPECIFICATIONS
body_styleELECTRICALLY SHIELDED, FULL INSULATOR, GASKET SEAT
reach_length0.375 INCHES NOMINAL IN
usage_designENGINE OTHER THAN AIRCRAFT
electrode_styleSINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4)
pressure_rating140.0 POUNDS PER SQUARE INCH (PSI) NOMINAL MEAN EFFECTIVE LBS
width_across_flats0.812 INCHES NOMINAL IN
seat_major_diameter0.775 INCHES MAXIMUM IN
shield_thread_length0.375 INCHES NOMINAL IN
nondefinitive_spec/std_data1 TYPE AND A CLASS
dc_resistance_rating_in_ohms10000.0 NOMINAL
height_above_mounting_surface2.625 INCHES NOMINAL IN
top_to_shield_thread_distance0.125 INCHES NOMINAL IN
NSN2920-00-294-3746
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SPARK PLUG TITLE COMPONENT PN AR8S MFR SPARK PLUG
KEY FEATURES
•
REACH LENGTH: 0.375 INCHES NOMINAL IN
•
ELECTRODE STYLE: SINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4)
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 5/8-24 UNEF SHIELD
•
DC RESISTANCE RATING IN OHMS: 10000.0 NOMINAL
•
NONDEFINITIVE SPEC/STD DATA: 1 TYPE AND A CLASS
•
TOP TO TERMINAL CONTACT DISTANCE: 1.125 INCHES NOMINAL IN
•
TOP TO SHIELD THREAD DISTANCE: 0.125 INCHES NOMINAL IN
•
HEIGHT ABOVE MOUNTING SURFACE: 2.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
REACH LENGTH0.375 INCHES NOMINAL IN
ELECTRODE STYLESINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4)
THREAD SIZE AND SERIES/TYPE DESIGNATOR5/8-24 UNEF SHIELD
DC RESISTANCE RATING IN OHMS10000.0 NOMINAL
NONDEFINITIVE SPEC/STD DATA1 TYPE AND A CLASS
TOP TO TERMINAL CONTACT DISTANCE1.125 INCHES NOMINAL IN
TOP TO SHIELD THREAD DISTANCE0.125 INCHES NOMINAL IN
HEIGHT ABOVE MOUNTING SURFACE2.625 INCHES NOMINAL IN
TERMINAL SLEEVE INSIDE DIAMETER0.312 INCHES NOMINAL IN
PRESSURE RATING140.0 POUNDS PER SQUARE INCH (PSI) NOMINAL MEAN EFFECTIVE LBS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
66117Interchangeable
interchangeable cross-reference
interchangeable
52879AInterchangeable
interchangeable cross-reference
interchangeable
SR6F14Interchangeable
interchangeable cross-reference
interchangeable
WS506Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AR8S?
AR8S is a SPARK PLUG.
What parts can replace AR8S?
There are 4 known substitutes for AR8S: 66117, 52879A, SR6F14 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AR8S?
AR8S is cataloged in the Federal Logistics Information System (FLIS) under NSN 2920-00-294-3746. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026