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751-6402323-1 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

751-6402323-1: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 2.750 INCHES NOMINAL IN, length: 6.375 INCHES NOMINAL IN, material: NICKEL ALLOY, corner_radius: 0.250 INCHES NOMINAL IN, body_thickness: 0.622 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN, inverted_radius: 0.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-478-2109, 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
751-6402323-1
NSN: 5340-01-478-2109
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
width2.750 INCHES NOMINAL IN
length6.375 INCHES NOMINAL IN
materialNICKEL ALLOY
corner_radius0.250 INCHES NOMINAL IN
body_thickness0.622 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN
inverted_radius0.250 INCHES NOMINAL IN
special_featuresRETAINER
securing_device_typeTHREADED FASTENER
peripheral_shape_styleRECTANGLE, IRREGULAR ENDS, FOUR HOLES
cross-sectional_shape_styleFLAT
distance_between_holes_along_width0.938 INCHES NOMINAL IN
distance_between_holes_along_length2.875 INCHES NOMINAL IN
NSN5340-01-478-2109
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 751-6402323-1 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: 0.906 INCHES NOMINAL IN
•
CORNER RADIUS: 0.250 INCHES NOMINAL IN
•
LENGTH: 6.375 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLES ALONG LENGTH: 2.875 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLES ALONG WIDTH: 0.938 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-P-286 FED SPEC SINGLE MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: FLAT
•
INVERTED RADIUS: 0.250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG WIDTH0.906 INCHES NOMINAL IN
CORNER RADIUS0.250 INCHES NOMINAL IN
LENGTH6.375 INCHES NOMINAL IN
DISTANCE BETWEEN HOLES ALONG LENGTH2.875 INCHES NOMINAL IN
DISTANCE BETWEEN HOLES ALONG WIDTH0.938 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-P-286 FED SPEC SINGLE MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLEFLAT
INVERTED RADIUS0.250 INCHES NOMINAL IN
SECURING DEVICE TYPETHREADED FASTENER
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG LENGTH0.312 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 6
751-6402302-11Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
751-6402323 ITEM 1Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
211068978Reference document
Same NSN cross-reference
Reference document — Secondary reference
751-6402301 FIND 11Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
751-6402302 FIND 11Reference document
Same NSN cross-reference
Reference document — Secondary reference
751-6402301 ITEM 11Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
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 751-6402323-1?
751-6402323-1 is a COVER,ACCESS.
What parts can replace 751-6402323-1?
There are 6 known substitutes for 751-6402323-1: 751-6402302-11, 751-6402323 ITEM 1, 211068978 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 751-6402323-1?
751-6402323-1 is cataloged in the U.S. Government catalog under NSN 5340-01-478-2109. 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.