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164998 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

164998: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 7.120 INCHES NOMINAL IN, length: 13.620 INCHES NOMINAL IN, material: ALUMINUM ALLOY 6061, hole_diameter: 0.271 INCHES MINIMUM AND 0.276 INCHES MAXIMUM IN, body_thickness: 0.090 INCHES NOMINAL IN, surface_treatment: CHROMATE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-254-0940, 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
164998
NSN: 5340-01-254-0940
FSC: 5340 — Hardware, Commercial
CAGE: 21877 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
width7.120 INCHES NOMINAL IN
length13.620 INCHES NOMINAL IN
materialALUMINUM ALLOY 6061
hole_diameter0.271 INCHES MINIMUM AND 0.276 INCHES MAXIMUM IN
body_thickness0.090 INCHES NOMINAL IN
special_featuresFURNISHED WITH ALUMINUM BRACKET,ELECTRONIC SHIELDING GASKET,14 PANEL SCREWS,9 PLAIN NUTS AND 8 RIVETS; 16 ADDITIONAL HOLESAND ADHESIVES
surface_treatmentCHROMATE
corner_bevel_length0.019 INCHES NOMINAL IN
securing_device_typeSPECIAL
peripheral_shape_styleRECTANGLE, MULTI HOLES
hole_quantity_along_width4
hole_quantity_along_length10
NSN5340-01-254-0940
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 164998 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
•
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG WIDTH: 2.060 INCHES NOMINAL IN
•
LENGTH: 13.620 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-5541,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE
•
DISTANCE BETWEEN HOLES ALONG LENGTH: 2.750 INCHES NOMINAL IN
•
HOLE QUANTITY ALONG LENGTH: 10
•
DISTANCE BETWEEN HOLE CENTERLINE AND FIRST HOLE ALONG LENGTH: 1.000 INCHES NOMINAL IN
•
CORNER BEVEL LENGTH: 0.019 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLES ALONG WIDTH: 3.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG WIDTH2.060 INCHES NOMINAL IN
LENGTH13.620 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-5541,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE
DISTANCE BETWEEN HOLES ALONG LENGTH2.750 INCHES NOMINAL IN
HOLE QUANTITY ALONG LENGTH10
DISTANCE BETWEEN HOLE CENTERLINE AND FIRST HOLE ALONG LENGTH1.000 INCHES NOMINAL IN
CORNER BEVEL LENGTH0.019 INCHES NOMINAL IN
DISTANCE BETWEEN HOLES ALONG WIDTH3.000 INCHES NOMINAL IN
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/11,T6 FED SPEC SINGLE MATERIAL RESPONSE
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 164998?
164998 is a COVER,ACCESS.
What is the NSN for 164998?
164998 is cataloged in the U.S. Government catalog under NSN 5340-01-254-0940. 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.