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12940857 — PLATE,MOUNTING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

12940857: PLATE,MOUNTING.

The PLATE,MOUNTING is a the manufacturer industrial component. Key specifications include shape: SQUARE, width: 7.280 INCHES NOMINAL IN, length: 14.450 INCHES NOMINAL IN, material: ALUMINUM ALLOY 6061, thickness: 1.780 INCHES NOMINAL IN, end_item_identification: M109A6. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-399-5824, 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
12940857
NSN: 5340-01-399-5824
FSC: 5340 — Hardware, Commercial
CAGE: 19200 — COMBAT CAPABILITIES DEVELOPMENT COMMAND (CCDC) ARMAMENTS CENTER DBA CCDC DIV LOGISTICS RESEARCH AND ENGINEERING DIRECTORATE (USA)
SPECIFICATIONS
shapeSQUARE
width7.280 INCHES NOMINAL IN
length14.450 INCHES NOMINAL IN
materialALUMINUM ALLOY 6061
thickness1.780 INCHES NOMINAL IN
end_item_identificationM109A6
material_document_and_classificationQQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-399-5824
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12940857 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: 14.450 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
•
SHAPE: SQUARE
•
WIDTH: 7.280 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY 6061
•
THICKNESS: 1.780 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
LENGTH14.450 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-250/11 FED SPEC SINGLE MATERIAL RESPONSE
SHAPESQUARE
WIDTH7.280 INCHES NOMINAL IN
END ITEM IDENTIFICATIONM109A6
MATERIALALUMINUM ALLOY 6061
THICKNESS1.780 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: Insurance item — stocked against contingency demandNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 12940857?
12940857 is a PLATE,MOUNTING.
What is the NSN for 12940857?
12940857 is cataloged in the U.S. Government catalog under NSN 5340-01-399-5824. 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.