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1884920 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

1884920: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY, hole_diameter: 0.203 INCHES NOMINAL IN, body_thickness: 0.156 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN, inside_diameter: 4.000 INCHES NOMINAL IN, flange_thickness: 0.250 INCHES NOMINAL IN, outside_diameter: 5.495 INCHES MINIMUM AND 5.500 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-078-2436, 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
1884920
NSN: 5340-01-078-2436
FSC: 5340 — Hardware, Commercial
CAGE: 21877 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
materialCOPPER ALLOY
hole_diameter0.203 INCHES NOMINAL IN
body_thickness0.156 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN
inside_diameter4.000 INCHES NOMINAL IN
flange_thickness0.250 INCHES NOMINAL IN
outside_diameter5.495 INCHES MINIMUM AND 5.500 INCHES MAXIMUM IN
special_features3 ADDED OPENINGS AND MTG HOLE MODREQUIRED PER DWG 1884920 FSCM 21877
surface_treatmentPAINT
bolt_circle_diameter5.120 INCHES MINIMUM AND 5.130 INCHES MAXIMUM IN
inside_corner_radius0.125 INCHES MAXIMUM IN
securing_device_typeTHREADED FASTENER
peripheral_shape_styleROUND, MULTI HOLES
NSN5340-01-078-2436
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1884920 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
•
FLANGE THICKNESS: 0.250 INCHES NOMINAL IN
•
BOLT CIRCLE HOLE QUANTITY: 6
•
INSIDE CORNER RADIUS: 0.125 INCHES MAXIMUM IN
•
FIRST RECESS INSIDE HEIGHT: 1.062 INCHES NOMINAL IN
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
CROSS-SECTIONAL SHAPE STYLE: CIRCULAR RECESS
•
OUTSIDE DIAMETER: 5.495 INCHES MINIMUM AND 5.500 INCHES MAXIMUM IN
•
SECURING DEVICE TYPE: THREADED FASTENER
TECHNICAL CHARACTERISTICS
FLANGE THICKNESS0.250 INCHES NOMINAL IN
BOLT CIRCLE HOLE QUANTITY6
INSIDE CORNER RADIUS0.125 INCHES MAXIMUM IN
FIRST RECESS INSIDE HEIGHT1.062 INCHES NOMINAL IN
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
CROSS-SECTIONAL SHAPE STYLECIRCULAR RECESS
OUTSIDE DIAMETER5.495 INCHES MINIMUM AND 5.500 INCHES MAXIMUM IN
SECURING DEVICE TYPETHREADED FASTENER
INSIDE DIAMETER4.000 INCHES NOMINAL IN
BOLT CIRCLE DIAMETER5.120 INCHES MINIMUM AND 5.130 INCHES MAXIMUM 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

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 1884920?
1884920 is a COVER,ACCESS.
What is the NSN for 1884920?
1884920 is cataloged in the U.S. Government catalog under NSN 5340-01-078-2436. 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.