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5550278-7 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

5550278-7: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 2.640 INCHES NOMINAL IN, length: 7.250 INCHES MINIMUM AND 7.280 INCHES MAXIMUM IN, material: ALUMINUM ALLOY 6061, body_thickness: 0.400 INCHES NOMINAL IN, securing_device_type: SPECIAL, peripheral_shape_style: BAND TYPE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-231-8437, 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
5550278-7
NSN: 5340-01-231-8437
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
width2.640 INCHES NOMINAL IN
length7.250 INCHES MINIMUM AND 7.280 INCHES MAXIMUM IN
materialALUMINUM ALLOY 6061
body_thickness0.400 INCHES NOMINAL IN
securing_device_typeSPECIAL
peripheral_shape_styleBAND TYPE
cross-sectional_shape_styleFLAT
NSN5340-01-231-8437
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 5550278-7 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: 7.250 INCHES MINIMUM AND 7.280 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: FLAT
•
SECURING DEVICE TYPE: SPECIAL
•
PERIPHERAL SHAPE STYLE: BAND TYPE
•
WIDTH: 2.640 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY 6061
•
BODY THICKNESS: 0.400 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
LENGTH7.250 INCHES MINIMUM AND 7.280 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLEFLAT
SECURING DEVICE TYPESPECIAL
PERIPHERAL SHAPE STYLEBAND TYPE
WIDTH2.640 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY 6061
BODY THICKNESS0.400 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 1
5550275 ITEM 10Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 5550278-7?
5550278-7 is a COVER,ACCESS.
What parts can replace 5550278-7?
There is 1 known substitute for 5550278-7: 5550275 ITEM 10. Substitute compatibility should be verified for your specific system.
What is the NSN for 5550278-7?
5550278-7 is cataloged in the U.S. Government catalog under NSN 5340-01-231-8437. 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.