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Technical Data Sheet
PartsTable / COMPONENT / 270321S
270321S ✓ 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: UNSHIELDED,SOLID OR THREADED POST,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: 185.0 POUNDS PER SQUARE INCH (PSI) NOMINAL MEAN EFFECTIVE LBS, special_features: COMMERCIAL-INDUSTRIAL-TRANSPORT STYLE SERIES. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2920-00-172-3511, 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
270321S
NSN: 2920-00-172-3511
FSC: 2920
CAGE: 55469 — ESSEX INDUSTRIES, INC. DBA ESSEX INDUSTRIES (USA)
SPECIFICATIONS
body_styleUNSHIELDED,SOLID OR THREADED POST,GASKET SEAT
reach_length0.375 INCHES NOMINAL IN
usage_designENGINE OTHER THAN AIRCRAFT
electrode_styleSINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4)
pressure_rating185.0 POUNDS PER SQUARE INCH (PSI) NOMINAL MEAN EFFECTIVE LBS
special_featuresCOMMERCIAL-INDUSTRIAL-TRANSPORT STYLE SERIES
width_across_flats0.812 INCHES NOMINAL IN
seat_major_diameter0.8125 INCHES MAXIMUM IN
height_above_mounting_surface2.310 INCHES NOMINAL IN
NSN2920-00-172-3511
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SPARK PLUG TITLE COMPONENT PN 270321S MFR SPARK PLUG
KEY FEATURES
•
ELECTRODE STYLE: SINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4)
•
TEST DATA DOCUMENT: 81348-WS506 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
•
BODY STYLE: UNSHIELDED,SOLID OR THREADED POST,GASKET SEAT
•
WIDTH ACROSS FLATS: 0.812 INCHES NOMINAL IN
•
HEIGHT ABOVE MOUNTING SURFACE: 2.310 INCHES NOMINAL IN
•
SEAT MAJOR DIAMETER: 0.8125 INCHES MAXIMUM IN
•
PRESSURE RATING: 185.0 POUNDS PER SQUARE INCH (PSI) NOMINAL MEAN EFFECTIVE LBS
TECHNICAL CHARACTERISTICS (FLIS)
ELECTRODE STYLESINGLE FLAT SHELL GROUND ELECTRODE (SEE ALSO STYLE 4)
TEST DATA DOCUMENT81348-WS506 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
SPECIAL FEATURESCOMMERCIAL-INDUSTRIAL-TRANSPORT STYLE SERIES
BODY STYLEUNSHIELDED,SOLID OR THREADED POST,GASKET SEAT
WIDTH ACROSS FLATS0.812 INCHES NOMINAL IN
HEIGHT ABOVE MOUNTING SURFACE2.310 INCHES NOMINAL IN
SEAT MAJOR DIAMETER0.8125 INCHES MAXIMUM IN
PRESSURE RATING185.0 POUNDS PER SQUARE INCH (PSI) NOMINAL MEAN EFFECTIVE LBS
USAGE DESIGNENGINE OTHER THAN AIRCRAFT
REACH LENGTH0.375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
6NBC914MILG3278Interchangeable
interchangeable cross-reference
interchangeable
AT6PANG25Interchangeable
interchangeable cross-reference
interchangeable
AT6Interchangeable
interchangeable cross-reference
interchangeable
LA-6Interchangeable
interchangeable cross-reference
interchangeable
ADR6Interchangeable
interchangeable cross-reference
interchangeable
60-702Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 270321S?
270321S is a SPARK PLUG.
What parts can replace 270321S?
There are 16 known substitutes for 270321S: 6NBC914MILG3278, AT6PANG25, AT6 and 13 more. Substitute compatibility should be verified for your specific system.
Is 270321S still available?
270321S is currently cancelled.
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Last verified: July 2026