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489406 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

489406: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include material: STEEL, slot_width: 0.180 INCHES NOMINAL IN, body_thickness: 0.062 INCHES NOMINAL IN, inside_diameter: 6.250 INCHES NOMINAL IN, flange_thickness: 0.062 INCHES NOMINAL IN, outside_diameter: 6.375 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-787-8523, 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
489406
NSN: 5340-00-787-8523
FSC: 5340 — Hardware, Commercial
CAGE: 78385 — MEGGITT TROY INC (USA)
SPECIFICATIONS
materialSTEEL
slot_width0.180 INCHES NOMINAL IN
body_thickness0.062 INCHES NOMINAL IN
inside_diameter6.250 INCHES NOMINAL IN
flange_thickness0.062 INCHES NOMINAL IN
outside_diameter6.375 INCHES NOMINAL IN
special_features4 SLOTS 0.250 IN.WIDE SPACED45 DEG APART IN
inside_corner_radius0.031 INCHES NOMINAL IN
securing_device_typeTHREADED FASTENER
peripheral_shape_styleROUND, MULTI HOLES
first_recess_inside_height0.500 INCHES NOMINAL IN
hole_quantity_along_length3
NSN5340-00-787-8523
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 489406 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: 0.062 INCHES NOMINAL IN
•
INSIDE CORNER RADIUS: 0.031 INCHES NOMINAL IN
•
FIRST RECESS INSIDE HEIGHT: 0.500 INCHES NOMINAL IN
•
HOLE QUANTITY ALONG LENGTH: 3
•
DISTANCE BETWEEN HOLE CENTERS: 1.375 INCHES MINIMUM AND 1.850 INCHES MAXIMUM IN
•
MOUNTING OPENING SHAPE STYLE: OPEN VERTICAL SLOT
•
CROSS-SECTIONAL SHAPE STYLE: CIRCULAR RECESS
•
OUTSIDE DIAMETER: 6.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
FLANGE THICKNESS0.062 INCHES NOMINAL IN
INSIDE CORNER RADIUS0.031 INCHES NOMINAL IN
FIRST RECESS INSIDE HEIGHT0.500 INCHES NOMINAL IN
HOLE QUANTITY ALONG LENGTH3
DISTANCE BETWEEN HOLE CENTERS1.375 INCHES MINIMUM AND 1.850 INCHES MAXIMUM IN
MOUNTING OPENING SHAPE STYLEOPEN VERTICAL SLOT
CROSS-SECTIONAL SHAPE STYLECIRCULAR RECESS
OUTSIDE DIAMETER6.375 INCHES NOMINAL IN
BOLT HOLE CENTERLINE TO NEAREST EDGE DISTANCE1.062 INCHES NOMINAL IN
SECURING DEVICE TYPETHREADED FASTENER
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 489406?
489406 is a COVER,ACCESS.
What is the NSN for 489406?
489406 is cataloged in the U.S. Government catalog under NSN 5340-00-787-8523. 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.