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6539786-2 — PLATE,MOUNTING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

6539786-2: PLATE,MOUNTING.

The PLATE,MOUNTING is a the manufacturer industrial component. Key specifications include shape: RECTANGULAR, width: 3.0000 INCHES NOMINAL IN, length: 4.1250 INCHES NOMINAL IN, material: ALUMINUM ALLOY, thickness: 0.3440 INCHES MINIMUM AND 0.3640 INCHES MAXIMUM IN, special_features: THE ITEM IS SURFACED COATED TO MIL-C-26074, CL 4, GR A. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-459-2563, 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
6539786-2
NSN: 5340-01-459-2563
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
shapeRECTANGULAR
width3.0000 INCHES NOMINAL IN
length4.1250 INCHES NOMINAL IN
materialALUMINUM ALLOY
thickness0.3440 INCHES MINIMUM AND 0.3640 INCHES MAXIMUM IN
special_featuresTHE ITEM IS SURFACED COATED TO MIL-C-26074, CL 4, GR A
aperture_diameter1.7450 INCHES MINIMUM AND 1.7650 INCHES MAXIMUM IN
features_providedAPERTURE
surface_treatmentNICKEL
NSN5340-01-459-2563
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 6539786-2 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
•
LENGTH: 4.1250 INCHES NOMINAL IN
•
SHAPE: RECTANGULAR
•
APERTURE DIAMETER: 1.7450 INCHES MINIMUM AND 1.7650 INCHES MAXIMUM IN
•
FEATURES PROVIDED: APERTURE
•
SURFACE TREATMENT: NICKEL
•
WIDTH: 3.0000 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY
TECHNICAL CHARACTERISTICS
LENGTH4.1250 INCHES NOMINAL IN
SHAPERECTANGULAR
APERTURE DIAMETER1.7450 INCHES MINIMUM AND 1.7650 INCHES MAXIMUM IN
FEATURES PROVIDEDAPERTURE
SPECIAL FEATURESTHE ITEM IS SURFACED COATED TO MIL-C-26074, CL 4, GR A
SURFACE TREATMENTNICKEL
WIDTH3.0000 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY
THICKNESS0.3440 INCHES MINIMUM AND 0.3640 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 6539786-2?
6539786-2 is a PLATE,MOUNTING.
What is the NSN for 6539786-2?
6539786-2 is cataloged in the U.S. Government catalog under NSN 5340-01-459-2563. 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.