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2278403-00 — PLATE,MOUNTING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

2278403-00: PLATE,MOUNTING.

The PLATE,MOUNTING is a the manufacturer industrial component. Key specifications include shape: RECTANGULAR, width: 0.750 INCHES NOMINAL IN, material: ALUMINUM ALLOY 6061, thickness: 0.190 INCHES NOMINAL IN, end_item_identification: 4931-00-121-8707 TEST SET,FIRE CONTROL SUBSYSTEM AN/GSM-249, material_document_and_classification: QQ-A-200/8, T-6 FED SPEC 1ST MATERIAL RESPONSE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-151-8718, 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
2278403-00
NSN: 5340-01-151-8718
FSC: 5340 — Hardware, Commercial
CAGE: 06401 — L3 TECHNOLOGIES, INC. DBA COMMUNICATION SYSTEMS-WEST DIV COMMUNICATION SYSTEMS-WEST (USA)
SPECIFICATIONS
shapeRECTANGULAR
width0.750 INCHES NOMINAL IN
materialALUMINUM ALLOY 6061
thickness0.190 INCHES NOMINAL IN
end_item_identification4931-00-121-8707 TEST SET,FIRE CONTROL SUBSYSTEM AN/GSM-249
material_document_and_classificationQQ-A-200/8, T-6 FED SPEC 1ST MATERIAL RESPONSE
NSN5340-01-151-8718
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 2278403-00 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-200/8, T-6 FED SPEC 1ST MATERIAL RESPONSE
•
SHAPE: RECTANGULAR
•
WIDTH: 0.750 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY 6061
•
THICKNESS: 0.190 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-200/8, T-6 FED SPEC 1ST MATERIAL RESPONSE
SHAPERECTANGULAR
WIDTH0.750 INCHES NOMINAL IN
END ITEM IDENTIFICATION4931-00-121-8707 TEST SET,FIRE CONTROL SUBSYSTEM AN/GSM-249
MATERIALALUMINUM ALLOY 6061
THICKNESS0.190 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 2278403-00?
2278403-00 is a PLATE,MOUNTING.
What is the NSN for 2278403-00?
2278403-00 is cataloged in the U.S. Government catalog under NSN 5340-01-151-8718. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.