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01-166-2180 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

01-166-2180: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 6.299 INCHES NOMINAL IN, length: 6.299 INCHES NOMINAL IN, material: ALUMINUM ALLOY 3003, inside_width: 3.937 INCHES NOMINAL IN, securing_device_type: THREADED FASTENER, peripheral_shape_style: RECTANGLE, FOUR HOLES. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-166-2180, 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
01-166-2180
NSN: 5340-01-166-2180
FSC: 5340 — Hardware, Commercial
CAGE: 59155 — MARINE DIESEL, INC. DBA MARINE DIESEL (USA)
SPECIFICATIONS
width6.299 INCHES NOMINAL IN
length6.299 INCHES NOMINAL IN
materialALUMINUM ALLOY 3003
inside_width3.937 INCHES NOMINAL IN
securing_device_typeTHREADED FASTENER
peripheral_shape_styleRECTANGLE, FOUR HOLES
cross-sectional_shape_styleSQUARE OR RECTANGULAR RECESS
distance_between_holes_along_width4.000 INCHES NOMINAL IN
distance_between_holes_along_length5.512 INCHES NOMINAL IN
distance_from_first_hole_centerline_to_end_along_width1.142 INCHES NOMINAL IN
distance_from_first_hole_centerline_to_end_along_length0.394 INCHES NOMINAL IN
NSN5340-01-166-2180
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 01-166-2180 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: 1.142 INCHES NOMINAL IN
•
INSIDE WIDTH: 3.937 INCHES NOMINAL IN
•
LENGTH: 6.299 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLES ALONG LENGTH: 5.512 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLES ALONG WIDTH: 4.000 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: SQUARE OR RECTANGULAR RECESS
•
SECURING DEVICE TYPE: THREADED FASTENER
•
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH: 0.394 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG WIDTH1.142 INCHES NOMINAL IN
INSIDE WIDTH3.937 INCHES NOMINAL IN
LENGTH6.299 INCHES NOMINAL IN
DISTANCE BETWEEN HOLES ALONG LENGTH5.512 INCHES NOMINAL IN
DISTANCE BETWEEN HOLES ALONG WIDTH4.000 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLESQUARE OR RECTANGULAR RECESS
SECURING DEVICE TYPETHREADED FASTENER
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH0.394 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLERECTANGLE, FOUR HOLES
WIDTH6.299 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
10504478Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 01-166-2180?
01-166-2180 is a COVER,ACCESS.
What parts can replace 01-166-2180?
There is 1 known substitute for 01-166-2180: 10504478. Substitute compatibility should be verified for your specific system.
What is the NSN for 01-166-2180?
01-166-2180 is cataloged in the U.S. Government catalog under NSN 5340-01-166-2180. 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.