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A51B99003-409 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

A51B99003-409: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 29.000 INCHES NOMINAL IN, length: 21.000 INCHES NOMINAL IN, features_provided: SEALING CAPABILITY, securing_device_type: THREADED FASTENER, peripheral_shape_style: RECTANGLE, ROUNDED CORNERS, MULTI HOLES, end_item_identification: AIRCRAFT MODEL F-14A A. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-213-1909, 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
A51B99003-409
NSN: 5340-01-213-1909
FSC: 5340 — Hardware, Commercial
CAGE: 79RG9 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
width29.000 INCHES NOMINAL IN
length21.000 INCHES NOMINAL IN
features_providedSEALING CAPABILITY
securing_device_typeTHREADED FASTENER
peripheral_shape_styleRECTANGLE, ROUNDED CORNERS, MULTI HOLES
end_item_identificationAIRCRAFT MODEL F-14A A
hole_quantity_along_width18
hole_quantity_along_length14
NSN5340-01-213-1909
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: A51B99003-409 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
•
LENGTH: 21.000 INCHES NOMINAL IN
•
HOLE QUANTITY ALONG LENGTH: 14
•
FEATURES PROVIDED: SEALING CAPABILITY
•
SECURING DEVICE TYPE: THREADED FASTENER
•
HOLE QUANTITY ALONG WIDTH: 18
•
PERIPHERAL SHAPE STYLE: RECTANGLE, ROUNDED CORNERS, MULTI HOLES
•
WIDTH: 29.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
LENGTH21.000 INCHES NOMINAL IN
HOLE QUANTITY ALONG LENGTH14
FEATURES PROVIDEDSEALING CAPABILITY
SECURING DEVICE TYPETHREADED FASTENER
HOLE QUANTITY ALONG WIDTH18
PERIPHERAL SHAPE STYLERECTANGLE, ROUNDED CORNERS, MULTI HOLES
WIDTH29.000 INCHES NOMINAL IN
END ITEM IDENTIFICATIONAIRCRAFT MODEL F-14A 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 — no further procurement; issued until stock is exhaustedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is A51B99003-409?
A51B99003-409 is a COVER,ACCESS.
What is the NSN for A51B99003-409?
A51B99003-409 is cataloged in the U.S. Government catalog under NSN 5340-01-213-1909. 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.