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5209539 — PLATE,MOUNTING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

5209539: PLATE,MOUNTING.

The PLATE,MOUNTING is a the manufacturer industrial component. Key specifications include shape: RECTANGULAR, width: 4.000 INCHES NOMINAL4.000 INCHES NOMINAL IN, length: 12.250 INCHES NOMINAL12.250 INCHES NOMINAL IN, material: ALUMINUM ALLOY 5052 OR ALUMINUM ALLOY 5083 OR ALUMINUM ALLOY 5086, thickness: 0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN, thread_size: 0.138-32. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-317-7594, 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
5209539
NSN: 5340-01-317-7594
FSC: 5340 — Hardware, Commercial
CAGE: 53711 — NAVAL SEA SYSTEMS COMMAND (USA)
SPECIFICATIONS
shapeRECTANGULAR
width4.000 INCHES NOMINAL4.000 INCHES NOMINAL IN
length12.250 INCHES NOMINAL12.250 INCHES NOMINAL IN
materialALUMINUM ALLOY 5052 OR ALUMINUM ALLOY 5083 OR ALUMINUM ALLOY 5086
thickness0.250 INCHES NOMINAL0.250 INCHES NOMINAL IN
thread_size0.138-32
surface_treatmentANODIZE
mounting_hole_typeTHREADED AND UNTHREADED
mounting_hole_diameter0.138 INCHES NOMINAL ALL HOLES IN
mounting_hole_quantity8 AND 2
screw_thread_series_designatorNC
material_document_and_classificationH32 ASSN STD 1ST MATERIAL RESPONSE OR H112 ASSN STD 2ND MATERIAL RESPONSE
NSN5340-01-317-7594
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 5209539 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: 8 AND 2
•
LENGTH: 12.250 INCHES NOMINAL12.250 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625, TY 2, CL 2 MIL SPEC SINGLE TREATMENT RESPONSE
•
MATERIAL DOCUMENT AND CLASSIFICATION: H32 ASSN STD 1ST MATERIAL RESPONSE OR H112 ASSN STD 2ND MATERIAL RESPONSE
•
MOUNTING HOLE DIAMETER: 0.138 INCHES NOMINAL ALL HOLES IN
•
SHAPE: RECTANGULAR
•
THREAD SIZE: 0.138-32
•
SCREW THREAD SERIES DESIGNATOR: NC
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY8 AND 2
LENGTH12.250 INCHES NOMINAL12.250 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625, TY 2, CL 2 MIL SPEC SINGLE TREATMENT RESPONSE
MATERIAL DOCUMENT AND CLASSIFICATIONH32 ASSN STD 1ST MATERIAL RESPONSE OR H112 ASSN STD 2ND MATERIAL RESPONSE
MOUNTING HOLE DIAMETER0.138 INCHES NOMINAL ALL HOLES IN
SHAPERECTANGULAR
THREAD SIZE0.138-32
SCREW THREAD SERIES DESIGNATORNC
SURFACE TREATMENTANODIZE
WIDTH4.000 INCHES NOMINAL4.000 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

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 5209539?
5209539 is a PLATE,MOUNTING.
What is the NSN for 5209539?
5209539 is cataloged in the U.S. Government catalog under NSN 5340-01-317-7594. 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.