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Technical Data Sheet
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AS3121-04 — PLUG,EXPANSION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

AS3121-04: PLUG,EXPANSION.

The PLUG,EXPANSION is a the manufacturer industrial component. Key specifications include end_item_identification: MV-22 AIRCRAFT, criticality_code_justification: AGAV. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-501-4808, 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
AS3121-04
NSN: 5340-01-501-4808
FSC: 5340 — Hardware, Commercial
CAGE: 92555 — THE LEE CO DBA THE LEE CO (USA)
SPECIFICATIONS
end_item_identificationMV-22 AIRCRAFT
criticality_code_justificationAGAV
NSN5340-01-501-4808
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AS3121-04 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
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CRITICALITY CODE JUSTIFICATION: AGAV
TECHNICAL CHARACTERISTICS
CRITICALITY CODE JUSTIFICATIONAGAV
END ITEM IDENTIFICATIONMV-22 AIRCRAFT
SUBSTITUTES & CROSS-REFERENCES 1
SAE-AS3121Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
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 AS3121-04?
AS3121-04 is a PLUG,EXPANSION.
What parts can replace AS3121-04?
There is 1 known substitute for AS3121-04: SAE-AS3121. Substitute compatibility should be verified for your specific system.
What is the NSN for AS3121-04?
AS3121-04 is cataloged in the U.S. Government catalog under NSN 5340-01-501-4808. This indicates validated use in U.S. government and defense supply chains.
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