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803788-401 — BLOCK ASSEMBLY,SEAT

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

803788-401: BLOCK ASSEMBLY,SEAT.

The BLOCK ASSEMBLY,SEAT is a the manufacturer industrial component. Key specifications include fsc_application_data: AIRCRAFT ACCESSORY EQUIPMENT, end_item_identification: E-3A AIRCRAFT A. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-151-5259, 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
803788-401
NSN: 5340-01-151-5259
FSC: 5340 — Hardware, Commercial
CAGE: 29780 — MAG AEROSPACE INDUSTRIES, LLC DIV SAFRAN CABINS (USA)
SPECIFICATIONS
fsc_application_dataAIRCRAFT ACCESSORY EQUIPMENT
end_item_identificationE-3A AIRCRAFT A
NSN5340-01-151-5259
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 803788-401 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
•
FSC APPLICATION DATA: AIRCRAFT ACCESSORY EQUIPMENT
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATAAIRCRAFT ACCESSORY EQUIPMENT
END ITEM IDENTIFICATIONE-3A AIRCRAFT A
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: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 803788-401?
803788-401 is a BLOCK ASSEMBLY,SEAT.
What is the NSN for 803788-401?
803788-401 is cataloged in the U.S. Government catalog under NSN 5340-01-151-5259. 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.