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1339AS321-1 — PLATE,MOUNTING

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

1339AS321-1: PLATE,MOUNTING.

The PLATE,MOUNTING is a the manufacturer industrial component. Key specifications include shape: RECTANGULAR, width: 4.120 INCHES NOMINAL IN, length: 55.880 INCHES NOMINAL IN, material: ALUMINUM ALLOY 6061, thickness: 0.090 INCHES NOMINAL IN, material_document_and_classification: QQ-A-200/8, T-6 FED SPEC 1ST MATERIAL RESPONSE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-406-5030, 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
1339AS321-1
NSN: 5340-01-406-5030
FSC: 5340 — Hardware, Commercial
CAGE: 30003 — NAVAL AIR SYSTEMS COMMAND MANAGED ORIGINAL DESIGN ACTIVITY NOT MATERIAL/PARTS SUPPLIER (USA)
SPECIFICATIONS
shapeRECTANGULAR
width4.120 INCHES NOMINAL IN
length55.880 INCHES NOMINAL IN
materialALUMINUM ALLOY 6061
thickness0.090 INCHES NOMINAL IN
material_document_and_classificationQQ-A-200/8, T-6 FED SPEC 1ST MATERIAL RESPONSE
NSN5340-01-406-5030
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 1339AS321-1 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
•
LENGTH: 55.880 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-200/8, T-6 FED SPEC 1ST MATERIAL RESPONSE
•
SHAPE: RECTANGULAR
•
WIDTH: 4.120 INCHES NOMINAL IN
•
MATERIAL: ALUMINUM ALLOY 6061
•
THICKNESS: 0.090 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
LENGTH55.880 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-200/8, T-6 FED SPEC 1ST MATERIAL RESPONSE
SHAPERECTANGULAR
WIDTH4.120 INCHES NOMINAL IN
MATERIALALUMINUM ALLOY 6061
THICKNESS0.090 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 1339AS321-1?
1339AS321-1 is a PLATE,MOUNTING.
What is the NSN for 1339AS321-1?
1339AS321-1 is cataloged in the U.S. Government catalog under NSN 5340-01-406-5030. 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.