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5186890 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

5186890: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 1.390 INCHES NOMINAL IN, length: 4.000 INCHES NOMINAL IN, inside_width: 0.550 INCHES NOMINAL IN, peripheral_shape_style: RECTANGLE, MULTI HOLES, cross-sectional_shape_style: SQUARE OR RECTANGULAR RECESS. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-172-0063, 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
5186890
NSN: 5340-01-172-0063
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
width1.390 INCHES NOMINAL IN
length4.000 INCHES NOMINAL IN
inside_width0.550 INCHES NOMINAL IN
peripheral_shape_styleRECTANGLE, MULTI HOLES
hole_quantity_along_width4
hole_quantity_along_length2
cross-sectional_shape_styleSQUARE OR RECTANGULAR RECESS
NSN5340-01-172-0063
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 5186890 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
•
INSIDE WIDTH: 0.550 INCHES NOMINAL IN
•
LENGTH: 4.000 INCHES NOMINAL IN
•
HOLE QUANTITY ALONG LENGTH: 2
•
CROSS-SECTIONAL SHAPE STYLE: SQUARE OR RECTANGULAR RECESS
•
HOLE QUANTITY ALONG WIDTH: 4
•
PERIPHERAL SHAPE STYLE: RECTANGLE, MULTI HOLES
•
WIDTH: 1.390 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
INSIDE WIDTH0.550 INCHES NOMINAL IN
LENGTH4.000 INCHES NOMINAL IN
HOLE QUANTITY ALONG LENGTH2
CROSS-SECTIONAL SHAPE STYLESQUARE OR RECTANGULAR RECESS
HOLE QUANTITY ALONG WIDTH4
PERIPHERAL SHAPE STYLERECTANGLE, MULTI HOLES
WIDTH1.390 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
5340PL0987468Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 5186890?
5186890 is a COVER,ACCESS.
What parts can replace 5186890?
There is 1 known substitute for 5186890: 5340PL0987468. Substitute compatibility should be verified for your specific system.
What is the NSN for 5186890?
5186890 is cataloged in the U.S. Government catalog under NSN 5340-01-172-0063. 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.