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AS3123-57 — PLUG,EXPANSION

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

AS3123-57: PLUG,EXPANSION.

The PLUG,EXPANSION is a the manufacturer industrial component. Key specifications include height: 0.2480 INCHES MINIMUM AND 0.2620 INCHES MAXIMUM IN, material: ALUMINUM ALLOY 2024, outside_diameter: 0.2903 INCHES MINIMUM AND 0.2912 INCHES MAXIMUM IN, style_designator: CUP, material_thickness: 0.0251 INCHES NOMINAL IN, material_document_and_classification: ALLOY 2024, T4 NATIONAL SPEC SINGLE MATERIAL RESPONSE. This part is cataloged in the U.S.

Government catalog under NSN 5340-01-358-5677, 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
AS3123-57
NSN: 5340-01-358-5677
FSC: 5340 — Hardware, Commercial
CAGE: 0U583 — SAE INTERNATIONAL DBA SAE INTERNATIONAL (USA)
SPECIFICATIONS
height0.2480 INCHES MINIMUM AND 0.2620 INCHES MAXIMUM IN
materialALUMINUM ALLOY 2024
outside_diameter0.2903 INCHES MINIMUM AND 0.2912 INCHES MAXIMUM IN
style_designatorCUP
material_thickness0.0251 INCHES NOMINAL IN
material_document_and_classificationALLOY 2024, T4 NATIONAL SPEC SINGLE MATERIAL RESPONSE
NSN5340-01-358-5677
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AS3123-57 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
•
OUTSIDE DIAMETER: 0.2903 INCHES MINIMUM AND 0.2912 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: CUP
•
MATERIAL DOCUMENT AND CLASSIFICATION: ALLOY 2024, T4 NATIONAL SPEC SINGLE MATERIAL RESPONSE
•
MATERIAL THICKNESS: 0.0251 INCHES NOMINAL IN
•
HEIGHT: 0.2480 INCHES MINIMUM AND 0.2620 INCHES MAXIMUM IN
•
MATERIAL: ALUMINUM ALLOY 2024
TECHNICAL CHARACTERISTICS
OUTSIDE DIAMETER0.2903 INCHES MINIMUM AND 0.2912 INCHES MAXIMUM IN
STYLE DESIGNATORCUP
MATERIAL DOCUMENT AND CLASSIFICATIONALLOY 2024, T4 NATIONAL SPEC SINGLE MATERIAL RESPONSE
MATERIAL THICKNESS0.0251 INCHES NOMINAL IN
HEIGHT0.2480 INCHES MINIMUM AND 0.2620 INCHES MAXIMUM IN
MATERIALALUMINUM ALLOY 2024
SUBSTITUTES & CROSS-REFERENCES 2
SAE-AS3123Reference document
Same NSN cross-reference
Reference document — Secondary reference
PLGA2915010Reference document
Same NSN cross-reference
Reference document — Secondary 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 AS3123-57?
AS3123-57 is a PLUG,EXPANSION.
What parts can replace AS3123-57?
There are 2 known substitutes for AS3123-57: SAE-AS3123, PLGA2915010. Substitute compatibility should be verified for your specific system.
What is the NSN for AS3123-57?
AS3123-57 is cataloged in the U.S. Government catalog under NSN 5340-01-358-5677. 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.