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561-6404325-40 — PLATE,MOUNTING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

561-6404325-40: PLATE,MOUNTING.

The PLATE,MOUNTING is a the manufacturer industrial component. Key specifications include shape: RECTANGULAR, width: 0.937 INCHES NOMINAL0.937 INCHES NOMINAL IN, length: 6.500 INCHES NOMINAL6.500 INCHES NOMINAL IN, material: COPPER, thickness: 0.281 INCHES NOMINAL0.281 INCHES NOMINAL IN, aperture_type: COUNTERBORED. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-423-5026, 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
561-6404325-40
NSN: 5340-01-423-5026
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
shapeRECTANGULAR
width0.937 INCHES NOMINAL0.937 INCHES NOMINAL IN
length6.500 INCHES NOMINAL6.500 INCHES NOMINAL IN
materialCOPPER
thickness0.281 INCHES NOMINAL0.281 INCHES NOMINAL IN
aperture_typeCOUNTERBORED
aperture_shapeROUND
special_featuresTHREADS .190-24UNC-2B
aperture_diameter0.375 INCHES NOMINAL IN
counterbore_depth0.281 INCHES NOMINAL0.281 INCHES NOMINAL IN
features_providedAPERTURE
mounting_hole_typeTHREADED
NSN5340-01-423-5026
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 561-6404325-40 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
•
MOUNTING HOLE QUANTITY: 2
•
APERTURE TYPE: COUNTERBORED
•
LENGTH: 6.500 INCHES NOMINAL6.500 INCHES NOMINAL IN
•
MOUNTING HOLE DIAMETER: 0.145 INCHES MINIMUM AND 0.156 INCHES MAXIMUM ALL HOLES IN
•
SHAPE: RECTANGULAR
•
APERTURE DIAMETER: 0.375 INCHES NOMINAL IN
•
COUNTERBORE DEPTH: 0.281 INCHES NOMINAL0.281 INCHES NOMINAL IN
•
FEATURES PROVIDED: APERTURE
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY2
APERTURE TYPECOUNTERBORED
LENGTH6.500 INCHES NOMINAL6.500 INCHES NOMINAL IN
MOUNTING HOLE DIAMETER0.145 INCHES MINIMUM AND 0.156 INCHES MAXIMUM ALL HOLES IN
SHAPERECTANGULAR
APERTURE DIAMETER0.375 INCHES NOMINAL IN
COUNTERBORE DEPTH0.281 INCHES NOMINAL0.281 INCHES NOMINAL IN
FEATURES PROVIDEDAPERTURE
COUNTERBORE DIAMETER0.375 INCHES NOMINAL0.375 INCHES NOMINAL IN
SPECIAL FEATURESTHREADS .190-24UNC-2B
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 561-6404325-40?
561-6404325-40 is a PLATE,MOUNTING.
What is the NSN for 561-6404325-40?
561-6404325-40 is cataloged in the U.S. Government catalog under NSN 5340-01-423-5026. 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.